News: Global related to Chalmers University of TechnologyWed, 23 Aug 2017 14:56:06 +0200 Wittung-Stafshede elected to Council of Biophysical Society<p><b>​Chalmers Professor Pernilla Wittung-Stafshede is the first Swede for over fifty years to be elected to the Council of the International Biophysical Society.</b></p>​Pernilla Wittung-Stafshede was somewhat sceptical when she got an unknown US phone call. Was it a marketing call? But it turned out to be the president of the Biophysical Society who wanted to give her the news in person that she was one of four Society members that had just been elected to the Council.<br /><br />“I was very delighted. I am very much involved in academic research and science policy here in Sweden, but I would also like to make a contribution at the international level,” says Wittung-Stafshede.<br /><br />She is the second Swede and the first Swedish woman ever to have been elected to the Council of the Biophysical Society – a major, well-established society whose focus matches Wittung-Stafshede’s research interests well. The field of biophysics is involved in mapping the biological world all the way down to the molecular level. The Biophysical Society was founded in 1958 to encourage development and dissemination of knowledge in biophysics. It does so through its many programs, including its meetings, publications, and committee outreach activities. It has over 9000 members.<br /><br />“In my research group, we try to understand the molecular mechanisms of life and various diseases by performing biophysical and biochemical experiments on various strategic proteins,” explains Wittung-Stafshede.<br /><br />Among the issues she plans to emphasize during her three years on Council are gender issues, something she has already been involved in through one of the Biophysical Society’s committees. She would also like to try to get more young researchers interested in pursuing biophysics research, and she will make sure a range of topics are included in the program at the Society’s annual conference.<br /><br /><strong>Text</strong>: Ingela RoosWed, 23 Aug 2017 00:00:00 +0200 management for Production Area of Advance<p><b>​Lars Nyborg and Anette Larsson take over the management of Chalmers Production Area of Advance after Rikard Söderberg and Johan Stahre.</b></p>​There are two new leaders of the Production Area of Advance, both very well-known at Chalmers. <a href="/en/Staff/Pages/lars-nyborg.aspx" target="_blank">Lars Nyborg </a>was previously Head of the Department of Materials and Manufacturing Technology and <a href="/en/Staff/Pages/anette-larsson.aspx" target="_blank">Anette Larsson</a> is in charge of the <a href="/en/centres/sumo/Pages/default.aspx">SuMo BIOMATERIALS</a> research center.<br /><br /><a href="/en/Staff/Pages/lars-nyborg.aspx" target="_blank">Lars Nyborg</a> has been appointed Director, succeeding Rikard Söderberg. He also continues as responsible for the profile area of manufacturing processes. Lars Nyborg is professor in surface technology and a very active researcher in powder and surface technology. He is also prominent in the highly topical research field additive manufacturing. Until recently, Lars Nyborg has been in charge of the former Department of Materials and Manufacturing Technology and is now also Vice Head of Department and Responsible for Utilization at the <a href="/en/departments/ims/Pages/default.aspx">Department of Industrial and Materials Science</a>. Here he describes how he sees the future in the production area.<br /><br />– &quot;Society faces major challenges in areas such as digitization and life sciences, and not least the environment and the climate. We researchers need to gather all our skills and work together with industry and other actors in society to find the best solutions in these areas, &quot;says Lars Nyborg.<br /><br /><a href="/en/Staff/Pages/anette-larsson.aspx" target="_blank">Anette Larsson</a> is Assistant Professor of Pharmaceutical Technology at the Department of Chemistry and Chemical Engineering. She has previously been employed at <a href="">AstraZeneca R &amp; D in Mölndal</a> as a researcher, before returning to Chalmers. Today she is doing research about controlled release of drugs and customized pharmaceutical products. In addition, Anette Larsson is responsible for the <a href="/en/centres/sumo/Pages/default.aspx">SuMo BIOMATERIALS</a> research center. From this autumn, she is appointed Co-Director, succeeding Johan Stahre.<br /><br />Anette Larsson has not participated in the Production Area of Advance earlier and looks forward to learning more about the research conducted. She clearly sees what she can contribute with.<br /><br />– &quot;I have been working in the industry for many years and have also been in charge of a research center that has six major industrial companies as partners. I have gathered experiences that are valuable for an area of advance that has so many links to industrial challenges as Production has.<br /><br />In the immediate future, the focus for the new management is to support active fields and review how the strengths can support internationalization, education and, not least, cooperation. Lars Nyborg gives a few examples of the latter.<br /><br />– &quot;One of our areas is continuous production that can be linked to life sciences, and by being reinforced by Anette we can be even better in, for example, drug production. Another link that we will continue to develop is that between Production and Materials, where we believe there are great opportunities for both areas.<br /><br />Lars Nyborg and Anette Larsson also have the ambition to find new meeting forms and are about to launch a new concept this autumn.<br /><br />–  ”We want to invite everyone to a recurring Afternoon tea! Our three profile areas will be asked to present an urgent topic for each area. In addition, we would like to ask anyone who is curious about additive manufacturing, or 3D printing in metal, to sign up for our <a href="/en/areas-of-advance/production/calendar/Pages/initiative-seminar-2017-AM.aspx">initiative seminar on Frontiers of Additive Manufacturing</a> which is planned for <strong>October 11-12</strong>.”<br /><br /><br />Text: Nina SilowMon, 21 Aug 2017 14:00:00 +0200 start for conference on low temperature physics<p><b>​&quot;28th International Conference on Low Temperature Physics&quot; got a flying start on Wednesday with an inspiring lecture by Nobel Prize winner J Michael Kosterlitz. &quot;I first thought it was a joke, but when I got to Stockholm and received the price, I realized it must be true,&quot; he told.</b></p>Actually, Nobel Prize winner J Michael Kosterlitz would rather climb cliffs. But as a young doctor at the University of Birmingham, there were no mountains in sight – so Kosterlitz continued researching instead, he said in his speech at the Swedish Exhibition &amp; Congress Centre on 9 August.<br /><br />The major conference &quot;28th International Conference on Low Temperature Physics&quot; brings together 900 researchers from around the world on 9-16 August. The conference started with a keynote speech by J Michael Kosterlitz, who was awarded the Nobel Prize in Physics 2016 together with David Thouless and Duncan Haldane for their work in the physics of condensed matter. Kosterlitz opened the conference with the lecture &quot;Topological Order and Defects, and Phase Transitions in Two Dimensions&quot;.<br /><br />In front of an interested audience, he told about his inspiring journey up to the Nobel Prize, and how it happened when he received the happy message.<br />&quot;I was waiting at an underground car park when the phone rang. Then I had this weird conversation; a person with a strong Swedish accent said something about the Swedish National Academy and something about a Nobel Prize. I first thought it was a joke, but when I got to Stockholm and received the price, I realized it was true, said Michael Kosterlitz.<br />He is a professor at Brown University in Providence, Rhode Island, USA.<br />&quot;Our work was done early in the 1970s, so we had to wait a long time for the Nobel Prize, which came last year.&quot;<br /><img src="/SiteCollectionImages/Institutioner/MC2/News/kosterlitz_665x330_a.jpg" alt="" style="margin:5px" /><br />In his youth, Michael Kosterlitz was one of Britain's most skilled rock climbers. He even has his own mountain named in Italy – Fessura Kosterlitz in the famous Orco Valley, where he renewed the climbing during his time at the University of Torino (Instituto di Fisica Teorica) in the 60s and 70s. Kosterlitz was employed as a postdoctoral student in Torino after attending the University of Oxford in Britain.<br />&quot;I carried out long tedious calculations on the Veneziano Model which was actually a precursor to modern string theory. But when I wanted to go to Cern, I succeeded in submitting a delayed application, thanks to my usual chaotic lack of organisation. My wife then helped me look for vacancies in Britain instead and I applied for and got a place in Birmingham. &quot;Sit down and apply!&quot;, she urged me.<br />But, in fact, Birmingham was the last place he wanted to come to. So it was with some reluctance that Michael Kosterlitz accepted the service he was offered. In Birmingham, he worked alone with continued calculations in high temperature physics, but eventually became increasingly frustrated:<br />&quot;I was repeatedly scooped by a research team in Washington, who was actually doing the same thing what I was trying to do but they always managed to do it first. I was on my own and just couldn't keep up with them. So after this had happened at least twice, probably three times, I got really fed up and started walking around the department asking people if they had some problem maybe we could look at.&quot;<br />He continued his fascinating story:<br />&quot;I eventually found myself in David Thouless office listening to him, talking of all sorts of weird and wonderful things that I knew very little about, that's actually an exaggeration, that I knew nothing about; things like topology and phase transitions in two-dimensions. David had a related problem that they had broken for 20 years and we said we might be able to investigate it further&quot;, Michael Kosterlitz told us.<br />The rest is, as it is called, history. In 2016, Thouless and Kosterlitz were awarded the Nobel Prize in Physics for their groundbreaking discoveries in Birmingham. At the Swedish Exhibition &amp; Congress Centre, Kosterlitz praised his colleague:<br />&quot;David Thouless is a most remarkable man, he has the most incredible mind, he knew everything about everything and was a brilliant mathematician as well&quot;, he said about his friend and colleague.<br /><br />Per Delsing, Professor of Experimental Physics at the Department of Microtechnology and Nanoscience – MC2 – at Chalmers, is chairman of the Local Organization Committee for the Conference &quot;28th International Conference on Low Temperature Physics – LT28&quot;. It is the most important conference in low temperature physics, and is organized every three years, alternating in Europe, Asia and America. This year's conference is organized by MC2 in collaboration with the Department of Physics at the University of Gothenburg.<br />The target group is physicist who works at low temperatures.<br />&quot;I think and hope that this conference will be a success. We have around 900 registered participants, and I'm sure we have a very exciting week ahead&quot;,said Per Delsing in his welcome speech.<br />The LT conferences are of ancient lineage. The first was arranged in Cambridge in the late 40's, already.<br />&quot;My first conference was LT17 in Karlsruhe 33 years ago. You who are here for the first time can look forward to arranging LT40 around the year 2050&quot;, said Per Delsing (picture below).<br /><img src="/SiteCollectionImages/Institutioner/MC2/News/delsing_665x330.jpg" alt="" style="margin:5px" /><br />He also thanked the conference's main sponsors: The International Union of Pure and Applied Physics (IUPAP), Oxford Instruments and BlueFors Cryogenics. The organizers also receive a certain contribution from the Nobel Institute of Physics in Stockholm.<br />&quot;As you can imagine there are quite a lot of people who have been working with this conference  already before we start and I want to thank these people for putting in a lot of hard work to make this thing happen. Especially the programme committee chairs have put in a lot of effort to make the program and to sort all abstracts and everything, said Per Delsing.<br /><br />The local organizing committee has consisted of Per Delsing, Jonas Bylander, Mikael Fogelström, Floriana Lombardi, Thilo Bauch, Susannah Carlsson, Tord Claeson, Henrik Johannesson, Göran Johansson, Sergey Kubatkin, Tomas Löfwander, Vitaly Shumeiko, Janine Splettstoesser, Dag Winkler, August Yurgens and Stellan Östlund.<br />The five program committees have been chaired by Mikael Fogelström, Floriana Lombardi, Stellan Östlund, Göran Johansson and Thilo Bauch.<br />&quot;As you know there are also satellite conferences around the LT conferences. This year there are four of them; in Helsinki, Stockholm, Heidelberg and Leipzig. The Helsinki conference has just ended and I know that several of you were there. The ones in Stockholm, Heidelberg and Leipzig will start directly after we finish here&quot;, said Per Delsing.<br /><br />Text and photo: Michael Nystås<br /><br /><a href="">Read more about J Michael Kosterlitz</a> &gt;&gt;&gt;<br />Fri, 11 Aug 2017 08:00:00 +0200 research is highlighted in Electronics Letters<p><b>​​Ewa Simpanen, PhD student at the Photonics Laboratory at MC2, gets attention for her research in the June issue of the renowned scientific journal Electronics Letters.</b></p>Electronics Letters is internationally renowned for its rapid communication of new developments and emerging topics across the broad and interdisciplinary field of modern electronics and electrical engineering.<br /><br />In the June 2017 issue, the turn came to Ewa Simpanen, who's research interests concern lasers for data communication. She is being interviewed in the new issue, in which her latest scientific paper – co-written with colleagues at Chalmers and Hewlett Packard Enterprise in the U.S – is published as well.<br /><br /><img src="/SiteCollectionImages/Institutioner/MC2/News/vcsel_array_350px.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />Ewa Simpanen's research is about increasing the wavelength for low-cost laser and fiber technology to meet the growing needs of optical interconnects in the massive data centres – operated by giant service providers like Facebook and Google – that underpin our Internet-enabled world. <br />“The purpose of this work is to develop high-speed, longer wavelength those while still using the GaAs-based material systems as it enables the fabrication of VCSELs which are superior to those based on other material systems in terms of speed, efficiency, manufacturability, and cost”, says Ewa Simpanen.<br /><br />In the June issue of Electronics Letters she and her colleagues present a VCSEL design operating at 1060 nanometer, equal to one millionth of a metre.<br />“We have limited the wavelength extension to 1060 nm since the long-term reliability of GaAs-based VCSELs may be compromised if extending the wavelength beyond ∼1100 nm”. It is a longer wavelength than the current GaAs standards, located at 850 and 980 nm, to reduce chromatic dispersion and attenuation in the fiber, which is crucial for reaching the longer ranges of data centers. We have tried to find a sweet spot with the wavelength in between, explains Ewa Simpanen for Electronics Letters.<br /><br />VCSEL means vertical-cavity surface-emitting laser.<br /><br />Text and photo: Michael Nystås<br /><br />Caption: <br />A microscope image of an array of VCSEL devices on chip; newly fabricated and ready for characterisation.<br /><br /><a href="">Read the article in Electronics Letters</a> &gt;&gt;&gt;<br /><br />Source: Electronics Letters, Volume 53, Issue 13, 22 June 2017, page 819<br />DOI:  10.1049/el.2017.2117 , Print ISSN 0013-5194, Online ISSN 1350-911X<br />Tue, 08 Aug 2017 09:00:00 +0200 pioneer and faithful servant leaves MC2<p><b>​He was the first employee hired when MC2 was founded. Now the appreciated pioneer and faithful servant Lars-Åke Sidenberg clocks out after a total of 33 years at Chalmers. &quot;When I came here, the nanofabrication lab was just a big empty floor&quot;, he recalls.</b></p><div>Lars-Åke Sidenberg can look back on a long working life. He entered the labor market on June 1, 1970. We met him to get to know a little about how it feels to retreat after so many years.</div> <div>&quot;It feels joyful, but strange. One has had this routine for so many years, in working life, for 47 years&quot;, says Lars-Åke.</div> <div> </div> <div>His Chalmers history began at the Civil Engineering department (Väg-och vattenbyggnad) in 1984. Lars-Åke Sidenberg was employed as a research engineer with the task of maintaining and repairing the lab equipment.</div> <div>&quot;I worked at an institution called Water Supply Technology (Vattenförsörjningsteknik), which had a water analysis laboratory. In addition to making lab equipment, there was also some construction work; among other things, I improved measurement methods. That's also when the computers started to come out of the measure perspective, so you had to start scratching this with programming and the like for measurement collection systems&quot;, he says.</div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/la_sidenberg_665x330a.jpg" alt="" style="margin:5px" /><br /><em>Lars-Åke and his brand new bike.</em><br /><br />The title research engineer and duties have followed him all the way. </div> <div>&quot;Yes, it has basically been identical at all three places I've been here at Chalmers; service, maintenance and electronic construction activities. There have only been different types of equipment. You have learned the equipment that has been at each place.&quot;</div> <div> </div> <div>His time on Väg-och vattenbyggnad became quite short. In 1986, Lars-Åke was offered a post at the Department of Physics. He remained there until he was employed at MC2 at the year-end 1999-2000.</div> <div>&quot;I had the same job at Physics, I entertained and serviced measuring and process equipment. There was also some construction activities there; improvement of equipment and so on, and some new construction as well&quot;, says Lars-Åke.</div> <div> </div> <div>For the past 17 years, the Department of Microtechnology and Nanoscience – MC2 – has been his permanent point of residence. He was the first employee in the new state-of-the-art research environment built around the nanofabrication laboratory.</div> <div>&quot;The house was not even ready when I was hired. I was sitting in an office in Vasa's old hospital area and planned the systems, the media supply here; ventilation, process cooling and ... we sat with thick bins and flipped through drawings and looked them through. After six months, the lab started to be ready for occupation.</div> <div> </div> <h5 class="chalmersElement-H5">You can say that you were building up the business?</h5> <div>&quot;Yes, when I got here the lab was just a big empty floor. I've seen how it the floor was installed inside, how waterbeds were put in process one after another, and then the whole lab was growing up; the machines started coming ... I'm the pioneer!&quot;</div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/la_sidenberg_665x330c.jpg" alt="" style="margin:5px" /><br />Lars-Åke Sidenberg has been enjoying his time at Chalmers and MC2. That's why he has remained in the house for all these years. </div> <div>&quot;It's a nice crew, good task assignments and relatively high freedom, and you can plan your work at the same pace as you like. If something is urgent, you put down the lower priorities and take on what's urgent, and then you're working on that. It has been good. In that sense, you are a little self-employed person in the service almost. That's what has made it possible to stay and that the years have passed&quot;, he says.</div> <div> </div> <h5 class="chalmersElement-H5">What did you like about your duties?</h5> <div>&quot;I've been most commited to the construction business, I think. To build things – a measurement system or something that will then be used in the business. Repairs are also nice because it is about problem solving. You can rub the bumps of genius a bit, start unravel things and see how to solve the knot.&quot;</div> <div> </div> <div>Over the years, Lars-Åke has met many different people. Over the years at the Department of Physics, he collaborated with the PhD students in a smaller research group that supported them.</div> <div>&quot;When the PhD students wanted a device that would work in a certain way, I built and arranged it so that it worked as they wanted. Often it was the measurement system. It was very nice because I worked with researchers and graduates from almost the whole world. One got the most insight into how it was in their culture and how they lived.&quot;</div> <div>On MC2 it has looked a little different:</div> <div>&quot;Here I'm not as intimate with the researchers as we are our own staff who do service and maintenance. This means that you do not have the same close contact with the researchers; you only get the assignments and then you do it, you fix what is broken. Then you don't see that person anymore. It is a little different, but on the other hand, you have more contact with your colleagues instead, so it is leveling out.&quot;</div> <div> </div> <div>The memories are of course many after such a long career. Lars-Åke explains how it happened when he was employed at Chalmers. It turns out to be a fate of a fate and something that happened by chance.</div> <div>&quot;I worked in a laboratory called IVL (current Swedish Environmental Research Institute) before I arrived at Chalmers. IVL was an institute that also had a lab for water analysis and air particle analysis. Then it turned out they had some cooperation with Chalmers. A colleague at IVL asked me to go to Chalmers and look at a broken tool. No one else wanted to do it and then he asked me as the last person: &quot;Please, please, they almost prayed on their bare knees, can you go up to Chalmers?&quot; Okay, kind as I was, I went up and looked at it, and the machine turned out to be identical to the one we had at IVL. Then I fixed it so that it started and then it was fine. The lab engineer, who was the head, humbly thanked.</div> <div>&quot;A year passed and then a post at that department was announced, and I thought I would apply for it. I got there for a job interview and was shown around. When I got into that lab, the manager I met earlier greeted me happily: &quot;Hey, are you here!?&quot; The professor was surprised and said, &quot;Well, do you two know each other?&quot; &quot;Yes, he was here and fixed a machine, it works great still!&quot;</div> <div>&quot;After talking for a while, the professor said, &quot;You can consider yourself employed!&quot; I've never experienced that before. It was only because this lab director knew me since I had been there earlier and repaired the tool. Had I not been there that time I might not have been here at all today. It was really just a coincidence that made me come to a new place&quot;, says Lars-Åke.</div> <div> </div> <h5 class="chalmersElement-H5">Is there anything you will miss now when you stop?</h5> <div>&quot;Yes, of course. I will miss the fact that I no longer can go into the lab, fix tools and solve problems. But it's like they say, you don't get younger. Some day you reach the end of the road, but it will of course feel strange. Then my free time is also enriched; I have many interests and I don't think I will have any problems getting time pass.&quot;</div> <div> </div> <div>Lars-Åke Sidenberg was born in 1951 and grew up in Utby in northern Gothenburg. He is a real &quot;original gothenburger&quot;, who turned 66 years earlier this year.</div> <div>&quot;I've been staying on overtime here, but it's fine as long as you can keep your health, then you'll get along.&quot;</div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/la_sidenberg_665x330b.jpg" alt="" style="margin:5px" /><br /><em>Inspecting his new bike with colleagues Fredrik Johansson and Johan Persson. Lars-Åke to the right.</em><br /> </div> <div>Now he wants to devote his newly acquired freedom to the family and his other interests. Lars-Åke is married and has two adult sons. Last year he also became a grandfather of a little girl.</div> <div>&quot;There I have to do! I don't think I will have any trouble doing things in my leisure time. I also have a wife! House and garden. The whole kit. It's only work, he laughs.</div> <div> </div> <div>Otherwise, he does not like planning too much, but thinks it's best to take the day as it comes. Cycling is a major leisure interest and he thinks he will stick to it. He was given a fancy bike as retirement gift from the colleagues at MC2.</div> <div>&quot;No, you really should not care about planning. But if I knew I'd be 95 years old, maybe I could start repairing the house, fix it and travel a bit. One can safely spend time with the grandchild; these are the traditional things many want to do; I don't differ so much from the crowd. Of course I will take a ride on the bike one day a week! I promised everyone here to do so and then I have to keep it! I'll take a round and just like sliding past here, say hi and then cycle on.&quot;</div> <div> </div> <div>He also looks forward to being able to get sleep-in mornings in the future:</div> <div>&quot;Yes, I like sleep-in mornings! Because I sleep a little bad at night, it will be sweet to stay in bed. There are many who are jealous of not having to get up! In summer, it's usually no problem, but imagine in winter, when it's dark, then it's much harder!&quot;</div> <div> </div> <div>Lars-Åke Sidenberg was thanked for his services with cake and flowers at MC2 on 30 June. Many colleagues stopped by to wish him a warm good luck in his new life as a pensioner, and thank for all his efforts over the years. We will miss him!</div> <div> </div> <div>Text and photo: Michael Nystås</div>Mon, 07 Aug 2017 07:00:00 +0200 to know the Jubilee Professor Steven G Louie<p><b>​Professor Steven G Louie, UC Berkeley, USA, has been honored with a Jubilee Professorship at Chalmers in 2017. He is hosted by the Department of Microtechnology and Nanoscience – MC2 – and paid his first visit during the professorship a few months ago. We got the opportunity to ask him a few questions.</b></p><div>Steven G Louie is a professor of physics at University of California since 1984, where he has his own group of graduate and postdoc researchers.</div> <div>&quot;My group is in the size of about 12 to 15 people totally. At this moment I have 8 students and a couple of visitors. We're working on various different projects&quot;, says Steven G Louie, who is a very polite man.</div> <div> </div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/sglouie_220x180.jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px" />Professor Louie was born 1949 in the city Taishan in China. Taishan lies close to Hong Kong.</div> <div>&quot;My family moved to Hong Kong when I was five years old, and we eventually immigrated to US when I was 11. That means that I basically grew up in California. I am much more of an American than I am Chinese&quot;, he says.</div> <div> </div> <div>After going through the American public school system, the young Steven G Louie went to the University of California for his undergraduate and graduate studies. He got his PhD in 1976.</div> <div>&quot;I have enjoyed science and math very much since I was basically a teenager, and therefore decided to go into physics. That has been a great decision. I have enjoyed my career a lot.&quot;</div> <div> </div> <h5 class="chalmersElement-H5">What's your research interests?</h5> <div>&quot;I'm in so-called condensed matter physics, which is to understand the behaviour and the properties of materials. My research interests are pretty bored... covering a number of different classes of materials going anything from semiconductors to metals to superconductors.&quot; </div> <div>&quot;Nowadays I am very much interested in understanding the properties of nanostructure materials and so-called reduced dimensional systems like graphene, which is a twodimensional material basically, and the third dimension is only one atomic dimension thick. My interest and my expertise is basically to try to understand the properties of these materials through the theoretical analysis and computational studies from first principles. That sometimes involve very new and deep theoretical concepts, but at the same time largescale computations, because we want to make connection with real experiments done on those materials.&quot;</div> <div> </div> <div>In 2016, Steven G Louie became the founder and director of a new center for computational studies at Berkeley, The Center for Computational Study of Excited-State Phenomena in Energy Materials.</div> <div>&quot;Yes, it is a very exciting piece of item. It will be quite exciting to bring a group of people together to work on this kind of theoretical computations of materials&quot;, he says.</div> <div> </div> <div>In his spare time Steven G Louie likes to play tennis and work in his garden:</div> <div>&quot;Yes, I enjoy playing tennis and also gardening – that's my two favourite occupations out of physics activities. I also have five grandchildren, they give me a lot of enjoyment. The oldest is six, the youngest one is only five months. I have three children of my own; one boy and two girls&quot;, he says.</div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/mfogelstrom_sglouie_tclaeson_690x330.jpg" alt="" style="margin:5px" /><br /><em>Steven G Louie with his MC2 hosts, head of department Mikael Fogelström, to the left, and Professor Tord Claeson, to the right.</em><br /> </div> <div>Now Steven G Louie is also a proud Jubilee Professor at Chalmers, along with three other renowned colleagues from universities in Europe and USA. He regards the appointment as &quot;very exciting&quot;.</div> <div>&quot;I think it's an honor to be chosen to be a Jubilee Professor. Chalmers is a very well-known world-class university and research center, so I look forward to the opportunity to be able to get to know the people here better and find out more indepth the activities and possible setups and collaborations. The main purpose of this trip is basically to get to know the people here in the department and also explore the possibilities of finding something of mutual interest to work on.&quot;</div> <div> </div> <h5 class="chalmersElement-H5">Do you remember where you were when you got the message about this appointment?</h5> <div>&quot;I think I was in Berkeley and got an email from professor Tord Claeson. But it was no phone call, I don't remember getting a phone call&quot;, he says with a light smile, pronouncing Professor Tord Claeson's surname &quot;Klejson&quot;.</div> <div>&quot;I know people here and I have interacted with for example Professor Claeson earlier, but I have never had a kind of formal collaboration setup of, say, joint projects together. That's why I find it exciting to come here, just trying to get that started.&quot;</div> <div> </div> <div>He is not aware of any formal ceremony at which he will receive his jubilee professorship:</div> <div>&quot;I am not sure of that, but I am told that the president of the university would like to meet me, not during this visit but at my next visit, because apparently he is out of the country right now.&quot;</div> <div> </div> <div>Steven G Louie paid his first visit to Chalmers and MC2 in his new role as Jubilee Professor in late March and early April, and spent a full week in Gothenburg. He likes the city much:</div> <div>&quot;I have only been here for two days but I enjoy it very much. Gothenburg is very nice, it's a goodsized city, not too large but at the same time very friendly. And the food is good!&quot;</div> <div> </div> <h5 class="chalmersElement-H5">How was your journey to Gothenburg?</h5> <div>&quot;It was fine, it was long but fine. My wife is with me this time, and we flew from San Fransisco, California. She is sightseeing somewhere today, enjoying herself.&quot;</div> <div>The last time he visited Gothenburg was at a conference on nanotubes around ten years ago.</div> <div> </div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/sglouie_350px.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />Steven G Louie's first week at MC2 had an extremely busy schedule, and we were lucky to get to meet him for this interview. The professor was going to meet and discuss with many people. Among many other things he gave a talk at the annual Göteborg Mesoscopic Lecture in Kollektorn at MC2 on 30 March.</div> <div> </div> <h5 class="chalmersElement-H5">Are you given the opportunity to see the labs and so on?</h5> <div>&quot;Yes, I will be able to see the labs, but the last two days I have been meeting mostly individually with a couple of people together to discuss the latest and the greatest that's been done here in this building. I find that fascinating and a lot of cutting-edge research has been done here.&quot; </div> <div> </div> <h5 class="chalmersElement-H5">Will you come back more times during the year?</h5> <div>&quot;Yes, my plan in the next couple of years will be basically to try to find time to come for maybe a few times as part of this jubilee professorship, and hopefully there's some fruitful collaborations setup in an even longer term association&quot;, says Steven G Louie.</div> <div> </div> <div>At MC2, Mikael Fogelström, head of department, along with the Applied Quantum Physics Laboratory, will take good care of the professor.</div> <div> </div> <div>The Jubilee Professors of 2017 are Steven G Louie, UC Berkeley, USA, Virpi Kristiina Tuunainen, Aalto University, Finland, Robert Sinclair, Stanford University, USA, and Konstantin Neyman, Universitat de Barcelona, Spain.</div> <div> </div> <div><strong>Text and photo:</strong> Michael Nystås</div> <div> </div> <h5 class="chalmersElement-H5">Facts about Steven G Louie</h5> <div>Steven G Louie is a researcher within condensed matter physics and materials science. He received his Ph.D. in physics from UC Berkeley in 1976. After having worked at the IBM Watson Research Center, Bell Laboratories, and University of Pennsylvania, he joined the UC Berkeley faculty in 1980. He is a member of the National Academy of Sciences (2005), fellow of the American Physical Society (1985), senior faculty scientist and Theory Facility Director of the Molecular Foundry at LBNL, and editor of the journal Solid State Communications. He has been awarded a Sloan Fellowship (1980), a Guggenheim Fellowship (1989), two Miller Professorships (1986, 1995), the U.S. Department of Energy Award for Sustained Outstanding Research in Solid State Physics (1993), the Lawrence Berkeley National Laboratory’s Outstanding Performance Award (1995), the Aneesur Rahman Prize for Computational Physics of the American Physical Society (1996), the Davisson-Germer Prize in Surface Physics of the American Physical Society (1999), and shared with M. L. Cohen the Foresight Institute Richard P. Feynman Prize in Nanotechnology (2003). He is identified by the Web of Science as one of the most highly cited researchers in physics.</div> <div> </div> <div><a href="">Read more about Steven G Louie </a>&gt;&gt;&gt;</div> <div> </div> <h5 class="chalmersElement-H5">Jubilee Professorship at Chalmers</h5> <div>When Chalmers in 1979 celebrated 150 years, the government gave a Jubilee Professorship at Chalmers as a gift. The criteria to be met is that the holders will add Chalmers new skills and that the University's international relations will be strengthened. The chair can be divided into different time intervals during the year and held by different professors. They are designated by the President of Chalmers.</div>Fri, 04 Aug 2017 09:00:00 +0200 Experience in Nepal with Engineer without Border Sweden<p><b>​The project that we do is called “Build up Nepal: Earth Brick and Stone”. The main goal is to help Build up Nepal with the CSEB press machine. Many machines break down easily, making the production process quite inefficient. We are expected to find solutions of the common problems the machine usually have.</b></p><div dir="ltr" style="text-align:justify"><div dir="ltr"><p class="chalmersElement-P"><span lang="IN">Engineers Without Borders (EWB) (France: </span><span><span>Ingénieurs Sans Frontières</span></span><span><span lang="IN">, ISF) is a term used for number of non-governmental organizations in various countries which the activities focus on engineering that is oriented to development of disadvantaged communities, such as building or installing a form of facility that requires a degree of engineering work in underdeveloped countries. The organizations, have various projects driven by students. Many of them usually involve engineering student going down to solve real problems and helping the community.​</span></span></p> <div> </div> <p class="chalmersElement-P"><span><span lang="IN"></span></span><span>There</span><span> is also EWB in Sweden. Often called Ingenjörer utan gränser (IUG), the organization engages and supports projects based on engineering skills, often with collaboration with local organizations in many disadvantaged communities.The network includes students, professionals and seniors. IUG has many active projects in Tanzania, Kenya, Rwanda, Nepal and many other countries. See more about </span><a href="">IUG</a><span> by click here. </span></p></div></div> <div> </div> <div> </div> <div> </div> <div style="text-align:justify"> </div> <div> </div> <div> </div> <div> </div> <p class="chalmersElement-P" style="text-align:justify"><span><span lang="IN"><img src="/en/education/next-stop/stuamb/PublishingImages/Ambassador%20Post%20Images/Napalese%20street.jpg" class="chalmersPosition-FloatRight" alt="" style="width:297px;height:403px" />This summer, 4 bachelor students from Chalmers are sent to Nepal to work on their thesis in as well as to help with rehabilitation of earthquake-struck regions.There is one organization in Nepal called Build up Nepal, which is run by Swedish entrepreneur Björn Soderberg that is actively help rebuilding destroyed villages in Nepal after the famous 2015 Gorkha earthquake, which made about 200000 people homeless (see more at <a href="">Build Up Nepal</a></span></span><span><span lang="IN">). Build up Nepal provides training and tools to build houses made of compressed stabilised earth brick (CSEB), a building material with strength that rivals conventional fired bricks, but using local material and without the need to use fire to produce. The students work on quality control of the brick, building manuals and the roofing construction as their volunteering project as well as their thesis work.​</span></span></p> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <p class="MsoNormal" style="text-align:justify"><span style="font-size:13pt;line-height:107%;font-family:arial, sans-serif;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-attachment:initial;background-origin:initial;background-clip:initial"></span></p> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <p class="MsoNormal" style="text-align:right"><br /></p> <p class="MsoNormal" style="text-align:right"><br /></p> <div> </div> <p class="chalmersElement-P" style="text-align:right"><span>(A</span><span> typical evening in Nepalese street)</span></p> <p class="chalmersElement-P" style="text-align:justify"><span style="background-color:initial"><br /></span></p> <p class="chalmersElement-P" style="text-align:justify"><span></span><span style="background-color:initial">I</span><span style="background-color:initial">n addition, 2 more people were also sent to Nepal as volunteers from IUG. Me, Aksa, Chalmers’ alumni and Student Ambassador, and Johan Larsson, a professional. We go down to Nepal as mechanical engineers to improve the productivity of the machines used to create the CSEBs. Since we are not doing our thesis here, we can be considered a full time volunteer workers. Among the problems we need to tackle are: the difference of working style of people in Nepal, weather, and the un-ideal condition in Nepal. Build up Nepal has installed the CSEB press machine in more than 30 different remote areas in Nepal. Each one requires about 6 hours of driving from Kathmandu, where the main office of Build up Nepal is located. Not to mention that the machine weighs about 200 kilograms each and has to be carried through very bumpy and steep roads.</span></p> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <p class="chalmersElement-P" style="text-align:justify"><span><span><img src="/en/education/next-stop/stuamb/PublishingImages/Ambassador%20Post%20Images/machine.jpg" class="chalmersPosition-FloatLeft" alt="" style="width:445px;height:224px" />The project that we do is called “Build up Nepal: Earth Brick and Stone”. The main goal is to help Build up Nepal with the CSEB press machine. Many machines break down easily, making the production process quite inefficient. We are expected to find solutions of the common problems the machine usually have.</span></span></p> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <p></p> <div> </div> <p class="chalmersElement-P"><span><br /></span></p> <p class="chalmersElement-P"><span><br /></span></p> <p class="chalmersElement-P"><span style="background-color:initial">(D</span><span style="background-color:initial">iscus</span><span style="background-color:initial">sing about the CSEB machine with local engineer)</span></p> <p class="chalmersElement-P"><span style="background-color:initial"><br /></span></p> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <p class="chalmersElement-P" style="text-align:justify"><span lang="IN">You can also join IUG. Chalmers has a good connection with IUG. You can start by visiting </span><a href=""><span><span>Ingenjörer </span><span>U</span><span>tan </span><span>G</span></span><span>ränser </span></a><span><a href=""></a></span><span lang="IN">facebook page</span><span lang="IN">. Often, they will also organize lunch lecture about their projects, such as what did the students do, the results, obstacles, and how you can join and contribute your skills to help the needy. The best part? You can do so while travelling to exotic countries!</span></p> <div> </div> <div style="text-align:justify"> </div> <div> </div> <div style="text-align:justify"> </div> <div> </div> <div style="text-align:justify"> </div> <div> </div> <p class="chalmersElement-P" style="text-align:justify"><span lang="IN">Keep in touch, I will post more stories about my journey here in Nepal.</span></p> <div> </div> <div style="text-align:justify"> </div> <div> </div> <div style="text-align:justify"> </div> <div> </div> <div style="text-align:justify"> </div> <div> </div> <p class="chalmersElement-P" style="text-align:justify"><span><span lang="IN">Story by : </span></span><span><span><a href="/en/education/next-stop/stuamb/Pages/Kurnia-Bijaksana.aspx">Muhammad Kurnia Bijaksana</a></span></span></p> <div> </div> <p class="chalmersElement-P" style="text-align:justify"> </p> <div> </div> <p class="chalmersElement-P" style="text-align:justify"> </p> <div> </div> <p class="chalmersElement-P" style="text-align:justify"> </p> <div> </div> <p class="chalmersElement-P" style="text-align:justify"> </p> <div> </div> <p class="chalmersElement-P" style="text-align:justify"> </p> <div> </div> <p class="chalmersElement-P" style="text-align:justify"> </p> <div> </div> <p class="chalmersElement-P" style="text-align:justify"> </p> <div> </div> <p class="chalmersElement-P" style="text-align:justify"><span>Edited : <a href="/en/education/next-stop/stuamb/Pages/angsusorn-apirajkamol.aspx">Angsusorn Apirajkamol </a></span></p>Thu, 03 Aug 2017 00:00:00 +0200 from Chalmers going to space<p><b>​Schottky diodes fabricated at the Nanofabrication Laboratory at the Department of Microtechnology and Nanoscience – MC2 – are becoming important components of the second generation weather satellite space project MetOp, scheduled for launch in 2019. The diodes were delivered to Omnisys Instruments this last May.</b></p> <div> It is the successful outcome of a five-year journey pursued by Vladimir Drakinskiy and Peter Sobis, and the latest example of research utilisation from MC2. &quot;We are very proud of our achievement and already see the effects in upcoming projects with the European Space Agency (ESA)&quot;, says Vladimir Drakinskiy.</div> <div> </div> <div>The weather satellite project MetOp is one of the biggest projects at the European Space Agency (ESA). Apart from improving the observations of the first MetOp generation, and observing precipitation and cirrus clouds, it will also further improve weather forecasting and climate monitoring from space in Europe and worldwide. The project will yield benefits from 2022 onwards to further improve forecasting.</div> <br /><img src="/SiteCollectionImages/Institutioner/MC2/News/vlad_peter_170630_665x330.jpg" alt="" style="margin:5px" /><br /><span><em>Vladimir Drakinskiy and Peter Sobis are leading the MetOp-project. Photo: Anna-Lena Lundqvist</em><br /><span></span></span><br /> <div>Vladimir Drakinskiy is a research engineer at the Terahertz and Millimetre Wave Laboratory (TML), and responsible for the Schottky diode process line at MC2, Chalmers. In this project, he has collaborated with Peter Sobis, guest researcher at TML and R&amp;D Adviser at Omnisys Instruments, one of Sweden's leading space companies with close connections to Chalmers. In close collaboration with Omnisys, TML has increased the technical maturity of Chalmers Schottky diodes to meet requirements for space applications.</div> <div> </div> <div>&quot;We have created a well-functioning collaboration platform that can efficiently build on ideas and knowledge in a research environment like that at Chalmers, to develop and create competitive products in Swedish industry, including for the commercial space market,&quot; says Peter Sobis in a brief comment.</div> <div> </div> <div>We got the opportunity to ask Vladimir Drakinskiy a few questions about the project and the efforts of him and Peter Sobis.</div> <div> </div> <h5 class="chalmersElement-H5">Could you tell me a bit about the recent activities?</h5> <div>&quot;The recent activities have involved audits and reviews conducted by ESA and Airbus, which we also collaborate with in the project. This has included the Chalmers Schottky process line at the Nanofabrication Laboratory and the delivery of space qualified components to Omnisys Instruments in the frame of the MetOp SG program&quot;, says Vladimir.</div> <div> </div> <h5 class="chalmersElement-H5">What's a Schottky diode?</h5> <div>&quot;A Schottky diode is a very fast two terminal electronic device consisting of a semiconductor to metal interface. The semiconductor in this case is a doped GaAs material with a Titanium-Platinum-Gold metal interface on top. The device can be used for generating and detecting microwave and terahertz radiation. In this case, to characterise various oxygen and water lines, a part of the terahertz frequency spectrum.&quot;</div> <div> </div> <h5 class="chalmersElement-H5">What's the background to all this?</h5> <div>&quot;MetOp SG stands for second generation Metrology Operation and is a second-generation weather and climate research satellite program that was commissioned in 2014, and that will provide weather and atmospheric data to the European countries. Operator is the European Telecommunications Satellite Organization (EUTELSAT).&quot;</div> <div> </div> <h5 class="chalmersElement-H5">Why is this so important?</h5> <div>&quot;MetOp SG is one of the biggest ESA programs and will be used not only for more precise weather forecasting but also for continuous long term atmospheric monitoring, which is crucial for better understanding of the underlying effects of global warming and long term prognosis of earth's climate.&quot;</div> <div> </div> <h5 class="chalmersElement-H5">Could you describe your own roles in the project?</h5> <div>&quot;Chalmers has developed a world class semiconductor process for terahertz Schottky diodes with unique qualities required for space applications. My role was to develop the fabrication technology to meet the formal requirements set by ESA and Airbus. Omnisys provided specifications, circuit demonstrators and carried out most of the reliability tests.&quot;</div> <div> </div> <h5 class="chalmersElement-H5">Has it been a time-consuming project? For how long have you been working with it?</h5> <div>&quot;The project has been part of a larger ongoing effort of developing a state-of–the-art semiconductor process specialised for terahertz space applications at Chalmers. For MetOp, a prequalification phase was initiated by the same team almost five years ago which later lead to a contract for fabrication and delivery of flight components which is where we are now.&quot;</div> <div> </div> <h5 class="chalmersElement-H5">I heard you celebrated with cake. How did this attention feel for you?</h5> <div>&quot;It has been a lot of hard work and it feels great to finally have succeeded. We are very proud of our achievement and already see the effects in upcoming projects with ESA&quot;, says Vladimir Drakinskiy.</div> <div> </div> <h5 class="chalmersElement-H5">What's happening now? What's the next step?</h5> <div>&quot;We have several projects running and will also soon initiate a new ESA project aiming for space qualification of our Schottky and HBV devices at even higher frequencies.&quot;</div> <div> </div> <div>Jan Stake is professor in terahertz electronics and head of the Terahertz Millimetre Wave Laboratory (TML) at MC2, where the project has been conducted. He is very pleased with the results:</div> <div>&quot;Delivering unique technology to one such project is of course a huge achievement of Chalmers. The project has been very challenging, different, but a great learning experience and raised the overall quality and ability related to process and manufacturing of terahertz electronics in the Nanofabrication Laboratory at Chalmers. Vladimir and Peter, clean room staff and everyone involved, have done a great work&quot;, he comments.<br /><br />Peter Modh is head of the Nanofabrication Laboratory:<br />&quot;The project shows that even in a lab that is not really certified, it is possible to get very advanced components that's strong enough to send out in space. It is a strength&quot;, he says.</div> <div> </div> <div>Text: Michael Nystås</div> <div>Photo: Anna-Lena Lundqvist </div> <div>Photo of satellite: ESA – Pierre Carril</div> <div> </div> <h4 class="chalmersElement-H4">METOP FACTS</h4> <div>MetOp is short for The Meteorological Operational satellite programme. It is a European undertaking providing weather data services to monitor the climate and improve weather forecasts. It represents the European contribution to a new co-operative venture with the United States National Oceanic and Atmospheric Administration (NOAA).</div> <div> </div> <div>MetOp is a series of three satellites, forming the space segment of Eumesat's Polar System (EPS). Launched on 19 October 2006, MetOp-A, the first satellite in the series, replaced one of two satellite services operated by NOAA and is Europe’s first polar-orbiting satellite dedicated to operational meteorology. </div> <div> </div> <div>MetOp-B, the second in the series, was launched on 17 September 2012 and operates in tandem with MetOp-A, increasing the wealth of data even further. The third and final satellite, MetOp-C will be launched in 2018. </div> <div> </div> <div>Launching a new satellite every 5–6 years guarantees a continuous delivery of high-quality data for medium- and long-term weather forecasting and climate monitoring until at least 2020. </div> <div> </div> <div><a href="">Read more about the MetOp project</a> &gt;&gt;&gt;</div> <div> </div> <div><a href="">Read more about Schottky diodes</a> &gt;&gt;&gt;</div> <div> </div>Fri, 30 Jun 2017 10:00:00 +0200 Rahiminejad new Wenner-Gren Fellow<p><b>​Postdoc researcher Sofia Rahiminejad at the Electronics Materials and Systems Laboratory (EMSL) at MC2, has been awarded the prestigious Wenner-Gren Foundation&#39;s fellow scholarship for postdoctoral education. It gives her the opportunity to research abroad for three years, followed by two years research at home.</b></p>Sofia Rahiminejad gets her grant for a project with the headline &quot;The use of new metamaterials for high frequency space applications&quot;. She will spend two and a half years at NASA's Jet Propulsion Laboratory (JPL), at California Institute of Technology (Caltech), Pasadena, USA, and the remaining six months at Stanford University, California, USA.<br /><br />The grant is awarded for the years 2017-2020. The sum depends on family situation and which country the fellow is travelling to.<br /><br />Wenner-Gren's fellow scholarship is the foundation's most exclusive program. Of the 75 received applications in 2017, only five were granted, after interviews with 15 candidates. The aim is to give the top young researchers the opportunity to qualify for postdoctoral education abroad for three years and to subsequently conduct research activities in Sweden for two years after renewing application.<br /><br />Text and photo: Michael Nystås<br /><br /><strong>Read more about Wenner-Gren Foundations &gt;&gt;&gt;</strong><br /><a href=""></a><br />Fri, 30 Jun 2017 06:00:00 +0200 spin in graphene can be switched off<p><b>​By combining graphene with another two-dimensional material, researchers at Chalmers University of Technology have created a prototype of a transistor-like device for future computers, based on what is known as spintronics. The discovery is published in the scientific journal Nature Communications.</b></p><div><img src="/SiteCollectionImages/Institutioner/MC2/News/saroj_nature_prm_pic_1_665px.jpg" alt="" style="margin:5px" /><br />Spin as the information carrier can result in electronics that are significantly faster and more energy efficient. It can also lead to more versatile components capable of both data calculation and storage. </div> <div> </div> <div>Just over two years ago, the same research group at Chalmers University of Technology demonstrated that graphene, which is an excellent electrical conductor, also has unsurpassed spintronic properties.</div> <div> </div> <div>The super-thin carbon mesh proved capable of conveying electrons with coordinated spin over longer distances and preserving the spin for a longer time than any other known material at room temperature.</div> Although the distance is still on the scale of a few micrometres and the time is still measured in nanoseconds, this in principle opened the door to the possibility of using spin in microelectronic components. <div> </div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/saroj_prasad_dash_350x305.jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px" />“But, it is not enough to have a good motorway for the spin signal to travel on. You also need traffic lights so the signal can be controlled,” says Associate Professor Saroj Dash, leader of the research group.</div> <div>“Our new challenge became finding a material that can both convey and control the spin. It is hard, since both tasks normally require completely opposite material properties,” he explains.</div> <div> </div> <div>Like many other researchers in the hot field of graphene, the Chalmers researchers therefore chose to test a combination of graphene and another thin, so-called two-dimensional material, with contrasting spintronic properties. <br /></div> &quot;Our material of choice was molybdenum disulphide, MoS2, due to its low spin lifetime steaming from high spin-orbit coupling,&quot; states André Dankert, postdoc researcher in the group. <div> </div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/andre_dankert_2017_350x305.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />André Dankert (to the right) and Saroj Dash designed an experiment where a few layers of molybdenum disulphide were placed on top of a layer of graphene in a type of sandwich, referred to as a heterostructure. With this, they could identify in detail what happens to the spin signal when the electron current reaches the heterostructure:</div> <div> </div> <div>“Firstly, the magnitude of the spin signal and lifetime in graphene is reduced tenfold just through the close contact with molybdenum disulphide. But, we also show how one can control the signal and lifetime by applying electrical gate voltage across the heterostructure,” explains Saroj Dash.</div> <div>This is because the natural energy barrier that exists between the material layers, called the Schottky barrier, reduces when the electrical voltage is applied. With this, the electrons can quantum mechanically tunnel from the graphene into the molybdenum disulphide. This causes spin polarisation to disappear; the spin becomes randomly distributed.</div> <div> </div> <div>Opening or closing a “valve” in this manner by regulating a voltage is similar to how a transistor works in conventional electronics. Nonetheless, Saroj Dash is a little hesitant to call the device a spin transistor.</div> <div>“When researchers proposed on future spin transistors, they often imagined something based on semiconductor technology and so called coherent manipulation of electron spin. What we have done works in a completely different way, but performs a similar switching task,” he says.</div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/saroj_nature_prm_pic_2_665px.jpg" alt="" style="margin:5px" /><br />“This is the first time that anyone has been able to demonstrate that the gate control of spin current and spin lifetime works at room temperature – which naturally increases the possibilities for different applications in the future,” says Saroj Dash. </div> <div> </div> <div>Although it is too early to predict what these would be, Dash points out that a component based on this principle might be extremely versatile because it contains magnetic memory elements, semiconductors and graphene, as well as having the capability of performing spintronic switching.</div> <div>“It points to a multifunctional component that can handle both data storage and processor work – in a single unit.”<br /><br />Text: Björn Forsman<br />Photo of Saroj Prasad Dash: Oscar Mattsson<br />Photo of André Dankert: Michael Nystås<br /></div> <div> </div> <h4 class="chalmersElement-H4">Facts: Molybdenum disulphide, MoS2</h4> <div>Molybdenum disulphide is a semiconducting substance that many have come in contact with, since it is the active ingredient in a certain type of lubricant sold at your local filling station.</div> <div>With its layered structure, molybdenum disulphide has similarities to graphite, which is made up of several layers of graphene that stick together. However, when it comes to spintronics the materials are each others' opposites. Molybdenum disulphide does not allow any polarised electron current to pass through whatsoever. The spin signal meets a sudden death since the electrons quickly return to their natural, random blend of up-spin and down-spin.</div> <div> </div> <h4 class="chalmersElement-H4">Facts: Spin and spintronics</h4> <div>Spin is a quantum mechanical property of electrons and other elementary particles. The spin is either directed up or directed down. The distribution is normally random.</div> <div>But, sometimes all or the majority of electrons in a material have their spin oriented in the same direction – up or down. This is how magnetism occurs.</div> <div>With the help of magnets, an electron current can be homogenised – i.e. polarised – so that all electrons have up-spin, for example. The current is then said to carry a spin signal.</div> <div>Coordinated spin is sensitive to disruptions and can be easily lost, but graphene has proven to be a conductor that allows a current to travel unusually long with its spin intact. Long enough to be able to use the spin as an information carrier in future logic components – spintronics.</div> <div> </div> <h4 class="chalmersElement-H4">Captions: </h4> <div><strong>Image 1 on top:</strong></div> <div>The experiment setup consists of a heterostructure of graphene and molybdenum disulphide spintronic device. By applying a gate voltage across the heterostructure, it is possible to control whether the current that passes will include any spin signal or not.<br /></div> <div> </div> <div><strong>Image 2:</strong></div> <div>Scanning electron microscope image of a fabricated molybdenum disulphide - graphene heterostructure spintronic device at Chalmers nanofabrication facility.</div> Thu, 29 Jun 2017 09:00:00 +0200 conference on low-temperature physics<p><b>On 9-16 August, researchers from all over the world gather at the Swedish Exhibition &amp; Congress Centre in Gothenburg for a major international conference on low temperature physics.</b></p>The &quot;28th International Conference on Low Temperature Physics&quot; gather 900 international top researchers together with the hottest Swedish colleagues in the area. &quot;Do not miss the Nobel Prize winner Michael Kosterlitz,&quot; says Per Delsing, chairman of the local organizing committee.<br /><br />He is Professor of Experimental Physics at the Department of Microtechnology and Nanoscience - MC2 - at Chalmers. The upcoming conference is organized by MC2 in collaboration with the Department of Physics at the University of Gothenburg.<br /><img src="/SiteCollectionImages/Institutioner/MC2/News/LT28-banner_b.jpg" width="679" height="168" alt="" style="margin:5px" /><br />The &quot;28th International Conference on Low Temperature Physics&quot; is the most important conference in low temperature physics. It is held every three years, alternating between Europe, Asia and America. The latest took place in Buenos Aires, the conference before that in Beijing. The target group is physicists who works at low temperatures.<br /><br />To Gothenburg, 900 participants from all over the world are expected, as well as 140 speakers.<br /><br /><strong>What should not be missed?</strong><br />&quot;Nobel laureate Michael Kosterlitz gives the first lecture on 9 August. We also award two prizes; The Simon Memorial Prize is awarded on 14 August and the Fritz London Memorial Prize on the 15th&quot;, says Per Delsing.<br /><br />Michael Kosterlitz, professor at British Brown University in Providence, Rhode Island, was awarded the Nobel Prize in Physics 2016 for his work on the physics of condensed matter. He will open the conference with a lecture entitled &quot;Topological Defects and Phase Transitions&quot;.<br /><br /><strong>Are there any happenings around the conference?</strong><br />&quot;Sunday, 13 August, is set aside for participants to see Gothenburg with surroundings.&quot;<br /><br /><strong>Will we hear some exciting research results?</strong><br />&quot;Absolutely, but what remains to be seen,&quot; concludes Per Delsing.<br /><br />Most members of the organizing committee for the conference are from MC2, but there are also members of the Department of Physics at the University of Gothenburg.<br /><br />Text: Michael Nystås<br />Photo: Peter Widing<br /><br /><strong>Read more about &quot;28th International Conference on Low Temperature Physics&quot; &gt;&gt;&gt;</strong><br /><a href=""></a><br />Wed, 28 Jun 2017 20:00:00 +0200 a robot controlled by the power of thought<p><b>​ Max Ortiz Catalan and Yiannis Karayiannidis, both working as researchers at the department of Electrical Engineering at Chalmers, want to develop robotic technology that can be used to increase the quality of life for people with motor disabilities. They are cooperating in an interdisciplinary project where biomedical engineering and robotics are combined.</b></p><strong>​<table class="chalmersTable-default" width="100%" cellspacing="0" style="font-size:1em"><tbody><tr class="chalmersTableHeaderRow-default"><th class="chalmersTableHeaderFirstCol-default" rowspan="1" colspan="1" style="text-align:center"><span><strong><img src="/SiteCollectionImages/Institutioner/s2/Nyheter%20och%20kalendarium/Max_Ortiz_Catalan_170x200px.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" /><span style="display:inline-block"></span></strong></span></th> <th class="chalmersTableHeaderOddCol-default" rowspan="1" colspan="1">​<span><strong><img src="/SiteCollectionImages/Institutioner/s2/Nyheter%20och%20kalendarium/Yiannis_Karayiannidis_170x200px.jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px" /><span style="display:inline-block"></span></strong></span></th> <th class="chalmersTableHeaderEvenCol-default" rowspan="1" colspan="1">​</th></tr> <tr class="chalmersTableOddRow-default"><th class="chalmersTableFirstCol-default" rowspan="1" colspan="1" style="text-align:right">   ​Max Ortiz Catalan</th> <td class="chalmersTableOddCol-default" style="text-align:left">​         Yiannis <span>Karayiannidis<span style="display:inline-block"></span></span></td> <td class="chalmersTableEvenCol-default">​</td></tr></tbody></table>  <br />What is the aim of your project?</strong><br />The aim is to investigate how the machine’s artificial intelligence can facilitate the achievement of certain task initiated by a human, who has overall control while delegating unnecessary burden to the robot.<br />We are aiming at appropriately blending commands sent to the robot using human myoelectric signals with autonomous robot control driven by the sensors on the robot. A first example that we will consider is a simple robot that is controlled by the human but it can autonomously avoid obstacles.<br /><br /><strong>How is it possible to control a robot by using the power of thought?</strong><br />The “power of thought” results in myoelectric signals that reflect the human intention of motion. By measuring, processing, and decoding these signals, the human intention could be send as a control command to the robot.<br /><br /><strong>In which applications could this be used?</strong><br />There is a variety of relevant applications related to partial automation such as assistive devices like exoskeleton (an external, artificial skeleton that protects and helps the person to move) or powered wheelchairs where the control is shared between a motor impaired human user and the device.  <br /><br /><strong>What are the main challenges you are confronted to?</strong><br />The most important challenge is to make a system that the human user can accept both in terms of performance and ease of use. <br /><br /><strong>This project is a part of an initiative to encourage interdisciplinary research. What can your areas of research learn from each other?</strong><br />Observing how humans are doing things (e.g. through muscles’ activity) can help roboticists to design human-inspired control algorithms so that robots could become more friendly to humans. <br /><br />Read more about interdisciplinary seed projects in Electrical Engineering:<br /><a href="/en/departments/e2/news/Pages/Initiative-that-takes-research-across-boundaries.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" /> Initiative that takes research across boundaries</a><br /><br /><a href="/sv/personal/Sidor/max-jair-ortiz-catalan.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Read more about Dr. Max Ortiz Catalan and his research</a><br /><br /><a href="/en/staff/Pages/yiannis.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Read more about Dr. Yiannis Karayiannidis and his research</a><br />Wed, 28 Jun 2017 15:30:00 +0200 and terahertz waves could lead the way to future communication<p><b>​By utilizing terahertz waves in electronics, future data traffic can get a big boost forward. So far, the terahertz (THz) frequency has not been optimally applied to data transmission, but by using graphene, researchers at Chalmers University of Technology have come one step closer to a possible paradigm shift for the electronic industry.</b></p><div>Over 60 young researchers from all over the world will learn more about this and other topics as they gather in outside of Gothenburg, Sweden, to participate in this week's summer school Graphene Study, arranged by Graphene Flagship.</div> <div> </div> <div>It is the EU's largest ever research initiative, the Graphene Flagship, coordinated by Chalmers, who organises the school this week, 25-30 June 2017. This year it is held in Sweden with focus on electronic applications of the two-dimensional material with the extraordinary electrical, optical, mechanical and thermal properties that make it a more efficient choice than silicon in electronic applications. Andrei Vorobiev is a researcher at the Terahertz and Millimetre Wave Laboratory at the Department of Microtechnology and Nanoscience - MC2 - as well as one of the many leading experts giving lectures at Graphene Study. He explains why graphene is suitable for developing devices operating in the THz range:</div> <div> </div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/andrei_vorobiev_MC2_S8A0112-2_220x180.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />“One of the graphene’s special features is that the electrons move much faster than in most semiconductors used today. Thanks to this we can access the high frequencies (100-1000 times higher than gigahertz) that constitutes the terahertz range. Data communication then has the potential of becoming up to ten times faster and can transmit much larger amounts of data than is currently possible”, says Andrei Vorobiev (to the right).</div> <div> </div> <div>Researchers at Chalmers are the first to have shown that graphene based transistor devices could receive and convert terahertz waves, a wavelength located between microwaves and infrared light, and the results were published in the journal IEEE Transactions on Microwave Theory and Techniques. One example of these devices is a 200-GHz subharmonic resistive mixer based on a CVD graphene transistor integrated on silicon that could be used in high-speed wireless communication links.</div> <div> </div> <div>Another example, taking advantage of graphene’s unique combination of flexibility and high carrier velocity, is a power detector based on a graphene transistor integrated on flexible polymer substrates. Interesting applications for such a power detector include wearable THz sensors for healthcare and flexible THz detector arrays for high resolution interferometric imaging to be used in biomedical and security imaging, remote process control, material inspection and profiling and packaging inspection.</div> <div> </div> <div>“Analysis show that flexible imaging detector arrays is an area where THz applications of graphene has a very high impact potential. One example of where this could be used is in the security scanning at airports. Because the graphene-based terahertz scanner is bendable you’ll get a much better resolution and can retrieve more information than if the scanner's surface is flat,” says Vorobiev.</div> <div> </div> <div>But despite the progress, much work remains before the final electronic products reach the market. Andrei Vorobiev and his colleagues are now working to replace the silicon base on which the graphene is mounted, which limits the performance of the graphene, with other two-dimensional materials which, on the contrary, can further enhance the effect. And Vorobiev hopes that he will be able to inspire the students participating in Graphene Study to reach new scientific breakthroughs.</div> <div> </div> <div>“In the last fifty years, all electronic development has followed Moore's law, which says that every year more and more functions will being applied on ever smaller surfaces. Now it seems that we have reached the physical limit of how small the electronic circuits can become and we need to find another principle for development. New materials can be one solution and research on graphene is showing positive results. Working with graphene-related research is about breaking new ground which involves many difficult challenges, but eventually our work can revolutionise the future of communication and that's what makes it so exciting,&quot; says Andrei Vorobiev.</div> <div> </div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/graphene-mixer-2_750px.jpg" width="676" height="507" alt="" style="margin:5px" /><br /><em>The sandglass shaped 40 μm wide graphene field-effect transistor, seen in the middle of the image, could be a key component in future high-speed wireless communication links. </em><span style="font-family:&quot;helvetica neue&quot;,helvetica,arial,sans-serif;font-size:13px;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;display:inline !important;float:none"><em>Illustration: Michael A. Andersson, Yaxin Zhang and Jan Stake/Chalmers University of Technology</em></span> </div> <div> </div> <div>Photo of discussing participants: Angelika Bernhofer</div> <div>Photo of Andrei Vorobiev: Anna-Lena Lundqvist</div> <div> </div> <h4 class="chalmersElement-H4">The scientific publications:</h4> <div>In the journal IEEE Transactions on Microwave Theory and Techniques 65 (1), 165-172: <a href="">A 185–215-GHz Subharmonic Resistive Graphene FET Integrated Mixer on Silicon</a></div> <div>Authors: Michael A Andersson, Yaxin Zhang and Jan Stake, all from Chalmers University of Technology</div> <div>DOI: 10.1109/TMTT.2016.2615928</div> <div> </div> <div>In the journal IEEE Microwave and Wireless Components Letters 27 (2), 168-170: <a href="">A W-band MMIC Resistive Mixer Based on Epitaxial Graphene FET</a></div> <div>Authors: Omid Habibpour, Zhongxia Simon He, Niklas Rorsman and Herbert Zirath, all from Chalmers University of Technology, and Wlodek Strupinski, Tymoteusz Ciuk and Pawel Ciepielewski from the Institute of Electronic Materials Technology, Poland</div> <div>DOI: 10.1109/LMWC.2016.2646998</div>Wed, 28 Jun 2017 10:00:00 +0200 Arpaia gets the chance to research abroad<p><b>​Postdoc researcher Riccardo Arpaia at the Quantum Device Physics Laboratory (QDP) at MC2, has been awarded an International Postdoc Grant from the Swedish Research Council of 3 150 000 SEK. He is now given the opportunity to research abroad for three years.</b></p>Riccardo Arpaia gets a grant for a project titled &quot;Evolution of nanoscale charge order in superconducting YBCO nanostructures&quot;. He will spend his time at the Physics Department of the Politecnico di Milano (Polytechnic University of Milan) in Italy. It is the largest technical university in Italy, with about 42,000 students. It offers undergraduate, graduate and higher education courses in engineering, architecture and design.<br /><br />The grant is awarded for the years 2017-2020.<br /><br />Apart from Riccardo Arpaia, a grant has been given to Anna Karlsson at the Department of Physics. The Swedish Research Council got a total of 248 applications in this call, of them only 41 recieved a yes.<br /><br />The aim of the International Postdoc Grant is to offer researchers, who recently completed their PhDs at a Swedish Higher Education Institution, the opportunity to extend their networks and improve their qualifications through work stays abroad with secure employment conditions.<br /><br />Text and photo: Michael Nystås<br /><br /><a href="">Read more about the decision</a> &gt;&gt;&gt;<br />Wed, 28 Jun 2017 09:00:00 +0200 hardware design contest on Hawaii<p><b>​​William Hallberg and Sebastian Gustafsson, PhD students at the Microwave Electronics Laboratory (MEL) at MC2, won first prize in the hackathon that was held at the International Microwave Symposium Conference (IMS2017) on Hawaii the other week.</b></p>IMS is one of the world's largest conferences in microwave technology, bringing together 2,500 participants from 50 countries. A lot of travelers came from Chalmers. For six intensive days at the Hawaii Convention Center in Honolulu, 554 presentations were held, which was the highest number in the conference's 60-year history, and an exhibition of 450 companies represented, among other things. Workshops and different types of courses were other parts of the offer.<br /><br /><img src="/SiteCollectionImages/Institutioner/MC2/News/william_sebastian_youtube_dump_400px.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />A hackathon is a programming contest where programmers are sitting and coding together for a limited time. The theme at the IMS conference was &quot;30-minute circuits&quot;, and was hardware focused on building a useful microwave circuit in just half an hour. Sebastian Gustafsson and William Hallberg ranked in the &quot;best isolation&quot; category, where they managed to get the first prize - partly to their own surprise:<br /><br />&quot;The award came as a bit of a surprise for us, since there were a lot of talented RF engineers competing side-by-side. Nevertheless, we are of course very happy for the award and the whole hackathon-experience is something we will remember for a long time&quot;, says Sebastian Gustafsson.<br /><br />William Hallberg comments the competition in an official clip on Youtube:<br />&quot;It was a very fun challenge to do this in such a short time.&quot;<br /><br />The International Microwave Symposium (IMS) is the annual conference and exhibition of the IEEE Microwave Theory and Techniques Society (MTT-S). In 2018, the conference will take place in Philadelphia, USA, on 10-15 June.<br /><br />Text: Michael Nystås<br />Photo: Private<br /><br /><a href="">Read more about the conference IMS 2017</a> &gt;&gt;&gt;<br /><br /><a href="">Read more about the hackathon</a> &gt;&gt;&gt;<br /><br /><a href="">Watch a short movie from the hackathon on Youtube</a> &gt;&gt;&gt;<br />Tue, 27 Jun 2017 09:00:00 +0200