News: Centre: Physics Centrehttp://www.chalmers.se/sv/nyheterNews related to Chalmers University of TechnologyFri, 21 Sep 2018 10:28:52 +0200http://www.chalmers.se/sv/nyheterhttps://www.chalmers.se/en/centres/gpc/news/Pages/Awarded-pioneer-in-plasma-physics-.aspxhttps://www.chalmers.se/en/centres/gpc/news/Pages/Awarded-pioneer-in-plasma-physics-.aspx​Awarded pioneer in plasma-physics faces accelerating challenges<p><b>​They are in x-ray machines at the hospitals and in the safety controls at the airports. They can detect fake artwork and sterilize food. Particle accelerators are fundamental in our society as tools of scientific discovery, but they are very large and expensive. This year’s Gothenburg Lise Meitner Award Laureate Chandrashekhar Joshi’s work promises to pave the way for smaller and cheaper accelerators to face crucial challenges in science and technology. ​</b></p><div><span style="background-color:initial">By using plasma to accelerate particles, Joshi has shown a new paradigm for building accelerators of the future. Professor Joshi is considered the Father of the experimental field of High-Gradient Plasma-based Charged Particle Acceleration. During four decades, Joshi and his colleagues have carried out pioneering experiments. By using plasma, they have managed to accelerate particles thousands of times more rapidly than in a conventional accelerator. </span><br /></div> <div><br /></div> <div>“The goal is to make the accelerators as small and cheap as possible. Aside from their use in high-energy physics, imagine that you have a thumb-sized accelerator that could be inserted into your body to irradiate a tumour or to be carried around in your briefcase.  That’s my dream for future accelerators, “says Chandrashekar Joshi, in connection with the Gothenburg Lise Meitner award ceremony on 20 September 2018.  </div> <div><br /></div> <div>Joshi made the first basic experiments in the field in the 1980’s and since then he has taught generations of students and researchers who are now scientific leaders worldwide. Today, he works at the University of California in the US, but he started his career on the other side of the world. </div> <div><br /></div> <div>In his hometown, 150 kilometres outside Mumbai, it was very unusual to study abroad. </div> <div>“My father gave me a book about great scientists when I was around 10 years old. It was so cool, and I made up my mind: I also wanted to discover something that was not known before,” says Joshi. </div> <div><br /></div> <div>“I was the second person ever who left the place and went abroad. But even though I came from a small town in India, I probably had fewer difficulties in my career than Lise Meitner had in hers, because of her gender. In that context, her achievements are even more remarkable!”</div> <div><br /></div> <div>At that time, when the Austrian-Swedish physicist Lise Meitner understood that it was possible to split an atomic nucleus, women were not even allowed in the laboratories. </div> <div>&quot;She was always running against the wind. She was a real pioneer and I admire her a lot. When I studied nuclear engineering when I was an undergraduate, Lise Meitner and Marie Curie were like Gods of fission to us. Therefore, I’m very pleased to receive the Gothenburg Lise Meitner award. She did get many prizes during her career, but never the Nobel Prize she so well deserved&quot;.</div> <div><br /></div> <div>In connection with the award ceremony in Gothenburg, Chandrashekhar Joshi gave a popular lecture at Chalmers in honour of Lise Meitner. </div> <div>He received the Gothenburg Lise Meitner award 2018 &quot;for conclusively demonstrating the advantages of using relativistically propagating plasma waves for electron acceleration.&quot;</div> <div><br /></div> <div>Text: Mia Halleröd Palmgren, <a href="mailto:mia.hallerodpalmgren@chalmers.se">mia.hallerodpalmgren@chalmers.se</a></div> <div>Foto: Johan Bodell,<a href="mailto:%20johan.bodell@chalmers.se%E2%80%8B"> johan.bodell@chalmers.se </a></div> <div><br /></div> <div><a href="http://www.chalmers.se/en/centres/gpc/activities/lisemeitner/Pages/default.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Read more about Lise Meitner, the Gothenburg Lise Meitner Award and previous laureates.  </a></div>Thu, 20 Sep 2018 00:00:00 +0200https://www.chalmers.se/en/departments/mc2/news/Pages/New-chairman-for-the-teachers.aspxhttps://www.chalmers.se/en/departments/mc2/news/Pages/New-chairman-for-the-teachers.aspxNew chairman for the teachers<p><b>​Sergey Cherednichenko, associate professor at the Terahertz and Millimetre Wave Laboratory at MC2, is the new chairman of the department&#39;s teacher faculty. 19 September, he is also promoted to professor. We had the opportunity to ask a few questions.</b></p><div><h5 class="chalmersElement-H5"><span>Congratulations on your new mission, Sergey! How does it feel?</span></h5></div> <div>&quot;Thanks! The feelings are complicated. On the one hand, it's always fun to start something new; new project, new job, new assignment. On the other hand, I'm a little, or maybe more, worried if I will be able to live up to my colleagues' expectations. I hope so&quot;, says Sergey Cherednichenko.</div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/SCherednichenko_300px.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />He was elected chairman at a meeting recently and took office immediately after that. His predecessor Per Hyldgaard had the mission for many years. MC2's teacher faculty currently consists of about 70 people - all assistant professors, researchers, associate professors and full professors with permanent employment.</div> <div>&quot;It may take a while before I fully understand what the mission means. Together with my colleagues, I hope to find a common model for how the faculty could work. I also see that the faculty's influence over MC2 will increase, for example by co-opt the chairman to the executive group. I look forward to being able to provide instant feedback at the faculty meetings and discuss decisions taken in the executive group. I can then get feedback back from the faculty. So far, all such information has been passed through the laboratory heads.&quot;</div> <div><br /></div> <h5 class="chalmersElement-H5">Do you have any specific thoughts already about what you want to do as chairman?</h5> <div>&quot;One issue that seems to raise questions in the faculty is the new faculty model that is now being implemented at Chalmers. There are several who wonder, for example, how they are affected, whether directly funded or not, and what to do to become part of Chalmers faculty. Another issue is that participation in education is becoming increasingly important - for both younger and more established researchers.&quot;</div> <div><br /></div> <div>This autumn, Sergey Cherednichenko is promoted to professor. On 19 September, he will hold his inauguration lecture titled &quot;Superconducting nano-sensors in space exploration&quot;. He is humble about the task:</div> <div>&quot;I am pleased that my work is appreciated by both Chalmers and the external reviewers, who usually investigate whether a professor's candidate qualifies for a higher status,&quot; says Sergey Cherednichenko.</div> <div>He continues:</div> <div>&quot;At the same time, it brings more responsibility for my own research, supervision, teaching, and cooperation within the department, the university and the outside world. I will try to maintain a good standard so that Chalmers professors continue to be regarded as creative, long-term and as good collaborators on the world stage.&quot;</div> <div><br /></div> <h5 class="chalmersElement-H5">What will the inauguration lecture be about?</h5> <div>&quot;Different materials and electronic components get more interesting features when we get down to nano-scale. For example, thermal processes are really fast, and even single photons are able to change states in such components to allow for the creation of detectors with enormous sensitivity. And it also applies to photons from microwaves to visible light and high energy particles. Such detectors have applications for long distance - hundreds of millions of kilometers - laser communication in space, unencrypted coding, or to study fast processes in real-time molecules.&quot;</div> <div><br /></div> <div>Sergey Cherednichenko joined Chalmers in 1997 at the invitation of MC2's former head of department Dag Winkler, to participate in the development of photo detectors based on high-critical media reel conducting films.</div> <div>&quot;At that time, I was a PhD student in Moscow and in the first years I visited Chalmers several times. After my dissertation, I was recruited to a postdoctoral appointment by professor Erik Kollberg in January 2000. That summer, MC2 was opened, and my lab, Microwave Electronics, was among the labs that moved into Kemivägen 9&quot;, says Sergey.</div> <div><br /></div> <div>His research team was commissioned to contribute terahert mixers to the European Space Agencys (ESA) Herschel space telescope. The project lasted for more than five years, resulting in Chalmers terahertz detectors opening the possibility for astronomers to &quot;see&quot; the universe in &quot;terahertz light&quot;. The telescope was launched into space in 2009.</div> <div>&quot;After that, there have been several projects that are mostly about terahertz detectors and spectroscopy. I also had a project funded by the European Research Council (ERC), where we developed new technologies for thin superconducting films of MgB2, now applied in quantum photon detectors for both terahertz waves and infrared waves (IR). There is a lot of cooperation with other laboratories within MC2, but also with other departments, such as Energy Technology&quot;, says Sergey Cherednichenko.</div> <div><br /></div> <div>Text: Michael Nystås</div> <div>Photo: Anna-Lena Lundqvist</div> <div><br /></div> <h5 class="chalmersElement-H5">INAUGURATION LECTURE</h5> <div><a>Sergey Cherednichenko, Superconducting nano-sensors in space exploration​</a></div> <div>Wednesday 19 September 2018, 10:00</div> <div>Kollektorn, MC2, Kemivägen 9</div> Mon, 17 Sep 2018 09:00:00 +0200https://www.chalmers.se/en/departments/mc2/news/Pages/Nobel-Prize-winner-on-stage-at-upcoming-seminar.aspxhttps://www.chalmers.se/en/departments/mc2/news/Pages/Nobel-Prize-winner-on-stage-at-upcoming-seminar.aspxNobel Prize Laureate on stage at upcoming seminar<p><b>​The Nobel Laureate Konstantin Novoselov is the major highlight at the initiative seminar &quot;2D materials beyond graphene&quot; on 1-2 October in Palmstedtsalen at Chalmers. &quot;I think that it was crucial for him to see that we have managed to gather leading scientists in this growing field of research for our seminar&quot;, says Ermin Malic, associate professor at the Department of Physics and director of the organizing Graphene Centre at Chalmers (GCC).</b></p><div><span style="background-color:initial">Konstantin Novoselov, professor at the University of Manchester, was awarded the Nobel Prize in Physics 2010 for his achievements with the novel material graphene. He will open the seminar's second day with a lecture entitled &quot;Materials in the Flatland&quot;. </span><br /></div> <div>Ermin Malic is very pleased to welcome the prominent guest among the many other well-renowned speakers: </div> <div>&quot;Konstantin Novoselov is very busy and gets many of such invitations. Therefore, we are, of course, very happy that he picked our event. I think that it was crucial for him to see that we have managed to gather leading scientists in this growing field of research for our seminar. Certainly, the talk of Konstantin Novoselov is a highlight, but I am really excited about every single talk&quot;, he says.</div> <div> </div> <div><img class="chalmersPosition-FloatLeft" src="/SiteCollectionImages/Institutioner/MC2/News/emalic_350x305.jpg" alt="" style="margin:5px" />Every year, the Excellence Initiative Nano has a topical event under the title Initiative Seminar. This year, the seminar is organized by the Graphene Center, which is an umbrella for all research at Chalmers on atomically thin 2D materials. </div> <div>&quot;Graphene is the most prominent representative of this class of materials. However, other 2D materials gain more and more importance in the current research. Therefore, we have put the focus of the seminar to 2D materials beyond graphene, in particular including monolayer transition metal dichalcogenides and related van der Waals heterostructures. We have invited leading experts in this emerging and technologically promising field of research&quot;, says Ermin Malic (to the left).</div> <div> </div> <h5 class="chalmersElement-H5">What's not to miss at the seminar? </h5> <div>&quot;The program is relatively dense covering a large spectrum of 2D material research. We will have 18 excellent talks in 8 different sessions including exciton phenomena, novel heterostructures materials, energy applications, opto-electronic applications as well as composite and bio applications.&quot;</div> <div> </div> <div>There will also be a poster session reflecting the 2D material research at Chalmers. </div> <div>&quot;The idea here is to offer Chalmers researchers the opportunity to present their research on 2D materials, now also including graphene. We would like to show the full spectrum and the excellence of 2D materials-based research at Chalmers.&quot;</div> <div> </div> <div>The participants can also look forward to hearing about exciting new research: </div> <div>&quot;Definitely. The field is very dynamic and there are still many open questions that are relevant for fundamental research and possible technological applications. The invited speakers perform cutting-edge research in this field, so we can expect many new insights and hopefully exciting discussions&quot;, says Ermin Malic.</div> <div> </div> <div>The two busy days aim at a broad audience; researchers, postdocs, PhD and master students and even industry representatives who are interested in novel developments in nanotechnology. Already, over 100 people are registered for the seminar, which takes place in the elegant auditorium Palmstedtsalen in Chalmers student union building. </div> <div>&quot;The large majority of the registered participants are researchers and students from Chalmers. However, some of the international speakers bring their own students to the seminar. We have also participants from other Swedish universities as well as company representatives.&quot;</div> <div> </div> <div>The invited speakers come from Sweden, Italy, Germany, Spain, Austria, Switzerland, Denmark, Russia, USA and UK. Among them are Frank Koppens (ICFO, Spain), Paulina Plochocka and Bernhard Urbaszek (CNRS, France), Thomas Müller (University of Vienna, Austria), Kristian Thygesen (DTU, Denmark) and Miriam Vitiello (National Research Council, Italy). Chalmers is represented by Timur Shegai (Physics), Saroj Dash (MC2), and Vincenzo Palermo (IMS).</div> <div> <span style="background-color:initial">&quot;Lunch and coffee breaks will offer a lot of time for deeper discussions&quot;, concludes Ermin Malic.</span></div> <div> </div> <div>Text: Michael Nystås</div> <div>Photo of Konstantin Novoselov: By Sergey Vladimirov (vlsergey) (Konstantin NovoselovUploaded by vlsergey) [CC BY 2.0  (https://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons</div> <div>Photo of Ermin Malic: Private</div> <div><br /> </div> <div>The seminar is free of charge, but don’t forget to register no later than 19 September. <br /><a href="/en/centres/graphene/events/2D%20beyond%20graphene/Pages/Registration.aspx" target="_blank" title="Link to seminar page">Read more, register and see full schedule of the seminar​</a> &gt;&gt;&gt;</div> Thu, 13 Sep 2018 09:00:00 +0200https://www.chalmers.se/en/departments/physics/news/Pages/Chalmers-grant-to-support-postdoctoral-studies-in-the-US0908-6029.aspxhttps://www.chalmers.se/en/departments/physics/news/Pages/Chalmers-grant-to-support-postdoctoral-studies-in-the-US0908-6029.aspxA Chalmers grant to support her postdoctoral studies in the US<p><b>​Postdoctoral researcher Nooshin Mortazavi at the Department of Physics, Chalmers, has recently been granted SEK 135 000 from the Barbro Osher Pro Suecia Foundation. The grant will cover research costs during her first year at Harvard University in Boston, USA.</b></p>Through this foundation, Chalmers can support researchers who spend some time at a University in the United States. The foundation is aimed at researchers who, in collaboration with leading research environments and colleagues at prominent universities in the USA, wish to develop their research by finding new inspiration or guiding it along with new paths.<br /><br /><div>Earlier this year Nooshin Mortazavi was awarded an international postdoctoral grant from the Swedish Research Council (VR) to carry out research on &quot;High-Temperature Thermoelectrics Based on Natural Superlattice Oxides&quot; in John A. Paulson School of Engineering and Applied Science at Harvard. The project has an ambitious goal: conversion of large amounts of waste heat to electricity using an intriguing but poorly characterized class of still-developing high-temperature ceramics, known as natural superlattices (NSLs).</div> <br /><div>Nooshin Mortazavi will spend up to three years abroad before returning to Chalmers. </div> <div><br /></div> <div>Text: Mia Halleröd Palmgren, <a href="mailto:mia.hallerodpalmgren@chalmers.se">mia.hallerodpalmgren@chalmers.se<br /></a></div> <div><a href="mailto:mia.hallerodpalmgren@chalmers.se"><br /></a></div>  <span><a href="/en/Staff/Pages/Nooshin-Mortazavi-Seyedeh.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Read more about Nooshin Mortazavi’s research.</a><a href="/en/Staff/Pages/Nooshin-Mortazavi-Seyedeh.aspx"><span style="display:inline-block"></span></a></span><br /><a href="http://www.chalmers.se/sv/stiftelse/stipendier/Sidor/osher.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Read more about the Barbro Osher Pro Suecia Foundation.</a><br /><a href="http://www.vr.se/"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more about the Swedish Research Council.</a><br />Sat, 08 Sep 2018 00:00:00 +0200https://www.chalmers.se/en/departments/mc2/news/Pages/New-tree-of-knowledge-inaugurated.aspxhttps://www.chalmers.se/en/departments/mc2/news/Pages/New-tree-of-knowledge-inaugurated.aspxNew tree of knowledge inaugurated<p><b>​A beautiful and fragrant dissertation tree was cheerfully inaugurated at MC2 in conjunction with the monthly staff coffee on 5 September. First doctoral student to nail his thesis on &quot;The Tree of Knowledge&quot; was Jens Schulenborg from the Applied Quantum Physics Laboratory.</b></p><div><span style="background-color:initial">To ceremonially nail dissertations on a Tree of Knowledge is a centuries-old academic nailed his famous 95 theses at the castle church in Wittenberg in 1517. The story was told by the head of MC2, Professor Mikael Fogelström, in his opening speech in Café Canyon.</span><br /></div> <div>&quot;One of the biggest outputs we have, which are most important for society, is actually training excellent students. Our new tree of knowledge is twice, we'll see how long it takes to fill this one up&quot;, he said.</div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/cmkihlman_IMG_5220_665x330.jpg" alt="" style="margin:5px" /><br /><span style="background-color:initial">The new tree complements the earlier one, which after 14 years has become so full that it does not hold one single dissertation more. It is made of spruce by MC2's legendary precision mechanician Carl-Magnus Kihlman (above), who has been working on it since May. The story also tells us that Kihlman also made the first tree as well.</span><br /></div> <div>&quot;We need to vigorously continue to train excellent people to take society forward. It is our biggest task&quot;, said Mikael Fogelström (below to the right).</div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/mfogelstrom_IMG_5158_350x305.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />The honor of being the first to cut the band and nail his thesis on the new tree, passed to Jens Schulenborg, PhD student at the Applied Quantum Physics Laboratory. He will defend his thesis &quot;Dynamics of open fermionic nano-systems — a fundamental symmetry and its application to electron transport in interacting quantum dots&quot; on 3 October.</div> <div><span style="background-color:initial">Jens initially had some difficulty cutting the band because of a somewhat slack sax, which caused a lot of cheerfulness in Café Canyon. But at last he finished the task with bravura. Now the tree is inaugurated and Jens Schulenborg's dissertation flashes proudly on one of the branches.</span><br /></div> <div><br /></div> <div>Text and photo: Michael Nystås</div> <div><br /></div> <div><a href="https://research.chalmers.se/publication/504776">Read more about Jens Schulenborg's thesis</a> &gt;&gt;&gt;<span style="background-color:initial">​</span></div>Fri, 07 Sep 2018 09:00:00 +0200https://www.chalmers.se/en/departments/mc2/news/Pages/Martin-Eriksson-receives-Arne-Sjogrens-Prize.aspxhttps://www.chalmers.se/en/departments/mc2/news/Pages/Martin-Eriksson-receives-Arne-Sjogrens-Prize.aspxMartin Eriksson receives Arne Sjögren&#39;s Prize<p><b>​Martin Eriksson, former PhD student at the Department of Physics, is honored with Arne Sjögren&#39;s Prize, which is now awarded for the fifth time. The prize of SEK 30,000 goes to the most innovative dissertation in nanoscience, and was instituted in memory of the chalmerist Arne Sjögren (F68).</b></p><div><span style="background-color:initial"><img src="/SiteCollectionImages/Institutioner/MC2/News/arne_sjogren_a_250px.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />At his passing in 2012, Arne Sjögren (to the right) donated SEK 370,000 to Chalmers, the amount on which the prize was based. Martin Eriksson is rewarded for his dissertation &quot;There's Plenty of Room in Higher Dimensions – Nonlinear Dynamics of Nanoelectromechanical Systems&quot;, which he defended in September 2017. He received his award at a simple ceremony during the recent networking meeting with researchers in the excellence initiative Nanoscience and Nanotechnology at Marstrand.</span><br /></div> <div>&quot;I feel very proud and honored! It's been very exciting to come back and see old colleagues again and to get the opportunity to share my research, since many hours have been spent struggling to achieve the results&quot;, says Martin Eriksson.</div> <div>In connection with the award ceremony, led by the excellence initiative director Bo Albinsson, Martin Eriksson also held a lecture in which he presented his dissertation.</div> <div>&quot;His analysis of nonlinear dynamics in small mechanical systems, has paved the road for for new studies, experimental and theoretical, on this topic&quot;, the jury writes in the motivation.</div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/meriksson_IMG_5060_665x330.jpg" alt="" style="margin:5px" /><br /><span style="background-color:initial">After his dissertation, Martin Eriksson had a postdoctoral service at Chalmers. Then he developed his research through various collaborations with researchers in the United States. The new results are expected to be published in the scientific journals Physics Review Letters and Nature Nanotechnology.</span><br /></div> <div>Martin Eriksson recently took office at the consulting company ÅF in Gothenburg.</div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/balbinsson_IMG_4901_350x305.jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px" />The Excellence Initiative's director, Professor Bo Albinsson (to the left), is very pleased to be able to hand out Arne Sjögren's Prize, which is now awarded to a doctor in nanotechnology from Chalmers for the fifth time:</div> <div>&quot;The doctoral students are the bloodstream of Chalmers research, and awarding an annual prize to the best thesis in nanoscience is a very important task,&quot; he says.</div> <div><br /></div> <div>Text and photo: Michael Nystås</div> <div>Photo of Arne Sjögren: Hans Block</div> <div><br /></div> <div><br /></div> <div><br /></div> <div><a href="https://research.chalmers.se/publication/251102">Read Martin Eriksson's doctoral thesis</a> &gt;&gt;&gt;</div> <div><br /></div> <h5 class="chalmersElement-H5">About Arne Sjögren's Prize &gt;&gt;&gt;</h5> <div>​The prize has been founded to recognize an outstanding student in the Nanoscience and Nanotechnology area, with the prime aim to boost a future career in academia or industry. It has been made possible by a generous donation by Chalmers alumnus Arne Sjögren (F68) who in his will donated part of his estate to be used for the benefit of research in the area of nanoscience and nanotechnology at Chalmers.</div> <div><br /></div> <h5 class="chalmersElement-H5">Earlier Prize winners:</h5> <div>2013 (for best dissertation 2012) Samuel Lara-Avila</div> <div>2014 No prize was awarded</div> <div>2015 Jakob Woller</div> <div>2016 André Dankert</div> <div>2017 Jelena Lovric</div> <div>2018 Martin Eriksson</div> <div><br /></div> <div><a href="http://chalmeristbloggen.wordpress.com/2013/03/20/arne-testamenterade-370-000-till-chalmers">Read more about Arne Sjögren and his will (in Swedish)​</a> &gt;&gt;&gt;</div> Wed, 05 Sep 2018 08:00:00 +0200https://www.chalmers.se/en/departments/physics/news/Pages/A-sophisticated-microscope-to-Gothenburg-after-prize-competiton.aspxhttps://www.chalmers.se/en/departments/physics/news/Pages/A-sophisticated-microscope-to-Gothenburg-after-prize-competiton.aspxA sophisticated microscope to Gothenburg after prize-competiton<p><b>​Steven Jones, PhD student at the Department of Physics, Chalmers, recently won a brand-new Raman microscope together with his supervisor Professor Mikael Käll.</b></p><div><img src="/SiteCollectionImages/Institutioner/F/Blandade%20dimensioner%20inne%20i%20artikel/mikroskopvinstbild200x270.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />The competition took place at a recent International Conference on Raman Spectroscopy (ICORS) on Jeju Island in South Korea. The task was to formulate and motivate the best project to be solved by using the sophisticated instrument from Nanobase.</div> <div><br /></div> <div>Steven Jones’ winning pitch was about his project on measuring the temperature in plasmonic nanoparticles by using so-called anti-Stokes Raman spectroscopy.<br /></div> <div><br /></div> <div>The microscope will be placed in Chalmers Material Analysis Laboratory (CMAL) and the instrument will be available for research activities at both Chalmers and the University of Gothenburg. </div> <div><br /></div> <div>Text: Mia Halleröd Palmgren, <a href="mailto:mia.hallerodpalmgren@chalmers.se">mia.hallerodpalmgren@chalmers.se​</a></div>Mon, 03 Sep 2018 00:00:00 +0200https://www.chalmers.se/en/departments/mc2/news/Pages/150-nano-researchers-at-successful-networking-event.aspxhttps://www.chalmers.se/en/departments/mc2/news/Pages/150-nano-researchers-at-successful-networking-event.aspx150 nano researchers at successful networking event<p><b>​150 participants, 65 research posters and a wide range of reputable speakers. It was a successful community building event for the excellence initiative Nanoscience and Nanotechnology in Marstrand on 20-22 August. &quot;This has evolved into the annual meeting place for the area&#39;s researchers, and with 150 participants it feels like we have established something really good,&quot; says director Bo Albinsson.</b></p><div><span style="background-color:initial"><img src="/SiteCollectionImages/Institutioner/MC2/News/nanoevent_balbinsson_IMG_4530_350x305.jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px" />Chalmers former Nanoscience and Nanotechnology Area of Advance has since been reorganized into an excellence initiative. It was the first time the researchers met in the new form for three days at Marstrands Havshotell, and overall the ninth networking meeting.</span><br /></div> <div>&quot;It is an opportunity to talk about both current and future issues. Those who are interested and active come here and know that it's good to meet and greet. Several have been here since the beginning – and it must mean that some think it's worth coming here,&quot; says Bo Albinsson (to the left), who is a professor of physical chemistry at the Department of Chemistry and Chemical Engineering.</div> <div>He is the director of the excellence initiative together with co-director Göran Johansson, Professor of Applied Quantum Physics and Head of the Applied Quantum Physics Laboratory at MC2.</div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/nanoevent_IMG_4657_robert_hadfield_bra_350x305.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />The participants were invited to a packed program with speakers from Sweden and other countries. Chalmers was represented by, among others, Per Delsing, Julie Gold and Giulia Ferrini. Among the invited international speakers were Robert Hadfield (to the right), University of Glasgow, and Tuomas Knowles, University of Cambridge.</div> <div><br /></div> <div>During the three days, 65 posters were exhibited and judged by a jury consisting of Professor Erwin Peterman, Vrije Universiteit in The Netherlands, and Professor Tero Heikkilä, University of Jyväskylä, Finland. The top three posters were rewarded with SEK 5,000 each, to be used for conference trips.</div> <div>On Wednesday morning, prizes for best posters were awarded to Maja Feierabend, Astrid Pihl and Ludvig de Knoop. Also, Arne Sjögren's award for best doctoral dissertation in the nano area 2017 was awarded to Martin Eriksson from the Department of Physics.</div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/nanoevent_IMG_5050_arrangorer_b_665x330.jpg" alt="" style="margin:5px" /><br /><span style="background-color:initial">The community building event was arranged by Astrid Pihl, </span><span style="background-color:initial">Maja Feierabend and </span><span style="background-color:initial">Ingrid Strandberg (picture above), PhD students at the departments of Chemistry and Chemical Engineering, Physics, and Microtechnology and Nanoscience –</span><span style="background-color:initial"> MC2.</span></div> <div>&quot;Preparations have taken place since April. At the end, there were a lot of logistics before all pieces fell into place,&quot; says Ingrid Strandberg, adding that all three were very pleased with the event.</div> <div><br /></div> <div>Text and photo: Michael Nystås</div> <div><br /></div> <div><a href="/en/research/strong/nano">Read more about the excellence initiative Nano</a> &gt;&gt;&gt;</div>Thu, 30 Aug 2018 10:00:00 +0200https://www.chalmers.se/en/departments/mc2/news/Pages/Now-the-quantum-computer-will-become-reality.aspxhttps://www.chalmers.se/en/departments/mc2/news/Pages/Now-the-quantum-computer-will-become-reality.aspxNow the quantum computer will become reality<p><b>​A billion-dollar research effort will make Sweden a world leader in quantum technology. Now, Chalmers researchers have begun work on developing a quantum computer with far greater computational power than today&#39;s best supercomputers.​</b></p><div><span style="background-color:initial">The days are currently full of interviews. Per Delsing, Professor of quantum device physics at Chalmers, is busy recruiting high-level researchers and doctoral students to help pull through a very challenging project: building a quantum computer that far exceeds today's best computers.</span><br /></div> <div><br /></div> <div>&quot;To get the right staff is the alpha and omega of it all. But it looks promising, we have received many good applications&quot;, says Per Delsing.</div> <div><br /></div> <div>The development of the quantum computer is the main project in the ten-year research program Wallenberg Centre for Quantum Technology, launched at the turn of the year, thanks to a donation of SEK 600 million from the Knut and Alice Wallenberg Foundation. With additional funds from Chalmers, industry and other universities, the total budget is landing nearly SEK 1 billion.</div> <div><br /></div> <div>The goal is to make Sweden a leading player in quantum technology. Indeed, recent research in quantum technology has placed the world on the verge of a new technology revolution – the second quantum revolution.</div> <div><a href="http://www.chalmers.se/SiteCollectionDocuments/Centrum/WACQT/Grafik%20kvantteknologi.pdf"><br />​</a>The first quantum revolution took place in the 20th century, <span><span><span><span><a href="/SiteCollectionDocuments/Centrum/WACQT/CM_15082018_Quantum%20technology_EN.pdf"><img src="/SiteCollectionImages/Institutioner/MC2/WACQT/EN_Quantum%20technology_750x446px.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px;width:300px;height:178px" /></a></span></span></span></span>when one learned to utilize quantum mechanical properties of light and material. This led, among other things, <span><span></span></span><span><span><span><a href="http://www.chalmers.se/SiteCollectionDocuments/Centrum/WACQT/Grafik%20kvantteknologi.pdf"></a></span></span></span>to the<span><a href="http://www.chalmers.se/SiteCollectionDocuments/Centrum/WACQT/Grafik%20kvantteknologi.pdf"></a></span> laser and transistor – inventions that underpin information technology that largely shape today's society.</div> <div><br /></div> <div>Now scientists have also learned to control individual quantum systems as individual atoms, electrons and photons, which opens up new opportunities. In sight, there are extremely fast quantum computers, interception-proof communication and hyper-sensitive measurement methods.</div> <div><br /></div> <div>Interest is big worldwide. Decision makers and business leaders begin to realize that quantum technology has the potential to greatly change our society, for instance through improved artificial intelligence, secure encryption and more effective design of drugs and materials. Several countries are investing heavily and the EU is launching a scientific flagship in the area next year.</div> <div><br /></div> <div>&quot;If Sweden will continue to be a top level nation, we must be at the forefront here&quot;, says Peter Wallenberg Jr.</div> <div><br /></div> <div>Several universities and major computer companies, like Google and IBM, are aiming to try to build a quantum computer. The smallest building block of the quantum computer – the quantum bit – is based on completely different principles than today's computers (see graphic). This means that you can handle huge amounts of information with relatively few quantum bits. To surpass the computational power of today's supercomputers, it's enough with 50-60 quantum bits. The Chalmers researchers aim at reaching at least one hundred quantum bits within ten years.</div> <div><br /></div> <div>&quot;Such a quantum computer could, for example, be used to solve optimization problems, advanced machine learning and heavy calculations of molecule properties,&quot; says Per Delsing, who heads the research program.</div> <div><br /></div> <div><img src="/SiteCollectionImages/Centrum/WACQT/Kvantdator_180518_11_340.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />The Chalmers researchers have chosen to base their quantum computer on superconducting circuits. They have worked with single superconducting quantum bits for almost 20 years and delivered many contributions to knowledge building within the field. Now they are going to scale up and get many quantum bits to work together.</div> <div><br /></div> <div>At the lab, they are currently working to improve the lifetime of single quantum bits. Quantum physiological conditions are extremely sensitive, and collapse if they are exposed to disturbances. Among other things, the researchers paint the inside of the experimental chamber black, so that disturbing microwaves that succeed in slipping through cables are quickly absorbed. They are also investigating and evaluating different strategies for linking quantum bits to each other, which is necessary to be able to perform proper calculations.</div> <div><br /></div> <div>&quot;In addition to the lifetime and the relationship between quantum bits, the number of quantum bits is an important piece of puzzle to solve. Making many of them is easy, but we need to find smart ways to utilize the equipment to control each of them. Otherwise, it will be very expensive,&quot; explains Per Delsing.</div> <div><br /></div> <div>In order for the project to get initiated councils, they are in the process of setting up a scientific board. Per Delsing is currently waiting for answers from eight quantum experts who were asked to be board members.</div> <div><br /></div> <div>&quot;They become a sounding board that we can discuss complex issues with, for instance how fast we will be able to scale the number of quantum bits. The technology we need to build the quantum computer is constantly evolving, and it's difficult to determine when it's time to buy it,&quot; he says.</div> <div><br /></div> <div>On the theory side, the recruitment of competent staff is at the focus right now. Theoretical physicist Giulia Ferrini, expert on quantitative calculations in continuous variables, was in place already in January and the recruitment process is ongoing with a number of applicants. A total of 15 people will be employed at Chalmers.</div> <div><br /></div> <div>&quot;We have received great response and good applicants. Getting the right people is the most important thing – the project does not get any better than the employees,&quot; says Göran Johansson, professor of applied quantum physics and one of the main researchers in the quantum computer project.</div> <div><br /></div> <div>The theoretical efforts will initially focus on developing a computer model of the quantum computer experiment so that they can help experimentalists forward through simulations.</div> <div><br /></div> <div><img src="/SiteCollectionImages/Centrum/WACQT/Kvantdator_180518_16.jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px;width:350px;height:234px" />&quot;A challenge is to identify early properties which are important in the model, so we do not include too many details when scaling up. Otherwise, we'll hit the ceiling for what a supercomputer can simulate before we reach up to 40 quantum bits,&quot; says Göran Johansson.</div> <div><br /></div> <div>Another important task for the theorists is to explore what a smaller quantum computer model can do. With eight-digit well-functioning quantum bits, one could drive the so-called Shors algorithm – which aroused the world's interest in building quantum computers - and crack today's encryption system. But the first quantum computers, which can do anything beyond what a regular computer can, will be significantly smaller.</div> <div><br /></div> <div>&quot;The question is what becomes the breakthrough application for a small quantum computer. We need to find out what a hundred bit quantum computer can solve for problems that someone is interested in knowing the answer to,&quot; says Göran Johansson.</div> <div><br /></div> <div>Here, collaboration with companies comes into the picture - from them, researchers can get tips for real-life and urgent applications to investigate. The Chalmers researchers have conducted discussions with Astrazeneca, who would have a lot to gain if they could calculate the characteristics of large molecules in their drug development, and Jeppesen who works to optimize aircraft crews and routes. The interest in becoming part of the quantum technology initiative is generally large among companies that have challenges that would be appropriate to solve with a quantum computer.</div> <div><br /></div> <div>&quot;They are keen to not miss the train. This can go quite quickly when it's getting started, and then it's important to have skills and be able to get up at the right pace,&quot; says Per Delsing.</div> <div><br /></div> <div>Text: Ingela Roos</div> <div>Photo: Johan Bodell</div> <div>Graphics: Yen Strandqvist</div> <div><br /></div> <div><a href="http://www.chalmers.se/sv/nyheter/magasin/Sidor/default.aspx">This is a text from Chalmers magasin #1 2018​</a></div> <div><br /></div> <h5 class="chalmersElement-H5">Facts about the Wallenberg Center for Quantum Technology</h5> <div>• Wallenberg Center for Quantum Technology is a ten-year initiative aimed at bringing Swedish research and industry to the front of the second quantum revolution.</div> <div>• The research program will develop and secure Swedish competence in all areas of quantum technology.</div> <div>• The research program includes a focus project aimed at developing a quantum computer, as well as an excellence program covering the four sub-areas.</div> <div>• The Wallenberg Center for Quantum Technology is led by and largely located at Chalmers. The areas of quantum communication and quantum sensors are coordinated by KTH and Lund University.</div> <div>• The program includes a research school, a postdoctoral program, a guest research program and funds for recruiting young researchers. It will ensure long-term Swedish competence supply in quantum technology, even after the end of the program.</div> <div>• Collaboration with several industry partners ensures that applications are relevant to Swedish industry.</div>Fri, 06 Jul 2018 09:00:00 +0200https://www.chalmers.se/en/departments/mc2/news/Pages/Fibre-optic-transmission-of-4000-km-made-possible-by-ultra-low-noise-optical-amplifiers.aspxhttps://www.chalmers.se/en/departments/mc2/news/Pages/Fibre-optic-transmission-of-4000-km-made-possible-by-ultra-low-noise-optical-amplifiers.aspxFibre-optic transmission of 4000 km made possible by ultra-low-noise optical amplifiers<p><b>​Researchers from Chalmers University of Technology, Sweden, and Tallinn University of Technology, Estonia, have demonstrated a 4000 kilometre fibre-optical transmission link using ultra low-noise, phase-sensitive optical amplifiers. This is a reach improvement of almost six times what is possible when using conventional optical amplifiers.​ The results are published in Nature Communications.</b></p><div><span style="background-color:initial"><img src="/SiteCollectionImages/Institutioner/MC2/News/figure_amplifier_comparison_eng_adj_180628_350x305.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />Video streaming, cloud storage and other online services have created an insatiable demand for higher transmission capacity. To meet this demand, new technologies capable of significant improvements over existing solutions are being explored worldwide.</span><br /></div> <div><br /></div> <div>The reach and capacity in today’s fibre optical transmission links are both limited by the accumulation of noise, originating from optical amplifiers in the link, and by the signal distortion from nonlinear effects in the transmission fibre. In this ground-breaking demonstration, the researchers showed that the use of phase-sensitive amplifiers can significantly, and simultaneously, reduce the impact of both of these effects. </div> <div><br /></div> <div>“While there remain several engineering challenges before these results can be implemented commercially, the results show, for the first time, in a very clear way, the great benefits of using these amplifiers in optical communication”, says Professor Peter Andrekson, who leads the research on optical communication at Chalmers University of Technology. </div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/peter_andrekson_170112_350x305.jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px" />The amplifiers can provide a very significant reach improvement over conventional approaches, and could potentially improve the performance of future fibre-optical communication systems.</div> <div><br /></div> <div>“Such amplifiers may also find applications in quantum informatics and related fields, where generation and processing of quantum states are of interest, as well as in spectroscopy or any other application which could benefit from ultra-low-noise amplification”, says Professor Peter Andrekson (tpo the left).</div> <div><br /></div> <div>The research has been funded by the European Research Council (ERC), the Swedish Research Council, and the Wallenberg Foundation.</div> <div><br /></div> <div><span style="background-color:initial"><strong>Caption, figure in top of page:</strong> Recovered signal constellation diagrams comparing conventional amplification and phase-sensitive amplification in an amplifier noise limited regime (-2 dBm launch power) and a fibre nonlinearity limited regime (8 dBm launch power). Illustration: Samuel Olsson</span><br /></div> <div><br /></div> <div><strong>Photo of Peter Andrekson:</strong> Henrik Sandsjö</div> <div><br /></div> <h5 class="chalmersElement-H5">Read the paper &gt;&gt;&gt;</h5> <div>Olsson et al., Long-haul optical transmission link using low-noise phase-sensitive amplifiers, Nature Communications 9, 2513 (2018). DOI 10.1038/s41467-018-04956-5​</div> Thu, 05 Jul 2018 04:00:00 +0200https://www.chalmers.se/en/departments/mc2/news/Pages/Josef-Hansson-awarded-by-Chalmers-Foundation.aspxhttps://www.chalmers.se/en/departments/mc2/news/Pages/Josef-Hansson-awarded-by-Chalmers-Foundation.aspxJosef Hansson awarded by Chalmers Foundation<p><b>​​Josef Hansson, PhD student at the Electronics Materials and Systems Laboratory and chair of the MC2 PhD student council, has recently been awarded with a travel grant from &quot;Alice och Lars Erik Landahls stipendiefond&quot;.</b></p><div>The grant, 18 800 SEK, will be used for the 2018 IEEE 68th Electronic Components and Technology Conference in San Diego.</div> <div><br /></div> <div>Text: Susannah Carlsson</div> <div>Photo: Michael Nystås</div>Mon, 02 Jul 2018 13:00:00 +0200https://www.chalmers.se/en/departments/physics/news/Pages/How-smart-technology-gadgets-can-avoid-speed-limits.aspxhttps://www.chalmers.se/en/departments/physics/news/Pages/How-smart-technology-gadgets-can-avoid-speed-limits.aspxHow smart technology gadgets can avoid speed limits<p><b>Speed limits apply not only to traffic. There are limitations on the control of light as well, in optical switches for internet traffic, for example. Physicists at Chalmers University of Technology now understand why it is not possible to increase the speed beyond a certain limit – and know the circumstances in which it is best to opt for a different route.</b></p><div>Light and other electromagnetic waves play a crucial role in almost all modern electronics, for example in our mobile phones. In recent years researchers have developed artificial speciality materials – known as optomechanical metamaterials – which overcome the limitations inherent in natural materials in order to control the properties of light with a high degree of precision. For example, what are termed optical switches are used to change the colour or intensity of light. In internet traffic these switches can be switched on and off up to 100 billion times in a single second. But beyond that, the speed cannot be increased any further. These unique speciality materials are also subject to this limit.</div> <div> </div> <div><span><img class="chalmersPosition-FloatRight" src="/SiteCollectionImages/Institutioner/F/340x296px/philippeandsophieapple340x295.jpg" alt="" style="margin:5px" /><span style="display:inline-block"></span></span>“Researchers had high hopes of achieving higher and higher speeds in optical switches by further developing optomechanical metamaterials. We now know why these materials failed to outcompete existing technology in internet traffic and mobile communication networks,” says Sophie Viaene, a nanophotonics researcher at the Department of Physics at Chalmers.</div> <div> </div> <div>To find out why there are speed limits and what they mean, Viaene went outside the field of optics and analysed the phenomenon using what is termed non-linear dynamics in her doctoral thesis. The conclusion she reached is that it is necessary to choose a different route to circumvent the speed limits: instead of controlling an entire surface at once, the interaction with light can be controlled more efficiently by manipulating one particle at a time. Another way of solving the problem is to allow the speciality material to remain in constant motion at a constant speed and to measure the variations from this movement.</div> <div> </div> <div>But Viaene and her supervisor, Associate Professor Philippe Tassin, say that the speed limit does not pose a problem for all applications. It is not necessary to change the properties of light at such high speeds for screens and various types of displays. So there is great potential for the use of these speciality materials here since they are thin and can be flexible.</div> <div>Their results have determined the direction researchers should take in this area of research and their scientific article was recently published in the highly regarded journal Physical Review Letters. The pathway is now open for the ever smarter watches, screens and glasses of the future. </div> <div><br /></div> <div> </div> <div>“The switching speed limit is not a problem in applications where we see the light, because our eyes do not react all that rapidly. We see a great potential for optomechanical metamaterials in the development of thin, flexible gadgets for interactive visualisation technology,” says Philippe Tassin, an associate professor at the Department of Physics at Chalmers.</div> <div>  <br /></div> <div>Text and image: Mia Halleröd Palmgren, <a href="mailto:mia.hallerodpalmgren@chalmers.se">mia.hallerodpalmgren@chalmers.se</a></div> <div> </div> <div>Caption (the image in the text above):Chalmers researchers Sophie Viaene and Philippe Tassin recently published their research findings in nanophotonics in the well-respected journal Physical Review Letters. They have determined what direction to take in their area of research. <br /></div> <div> </div> <div><span><a href="https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.120.197402?"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" /></a><a href="https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.120.197402?"><span style="display:inline-block"></span></a></span>Read the scientific article <a href="https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.120.197402?">Do Optomechanical Metasurfaces Run Out of Time?</a> in Physical Review Letters. The article is written by Chalmers’ researchers Sophie Viaene and Philippe Tassin together with Vincent Ginis and Jan Danckaert from the Vrije Universitet Brussels and Harvard University.</div> <div><br /></div> <div><h4 class="chalmersElement-H4">How nanophotonics and optomechanical metamaterials work:</h4> <div>Nanophotonics is a sub-field of physics which studies how to control and manipulate light by using structured electromagnetic materials.</div> <div>Light and electromagnetic waves are of crucial importance in our society, for the internet, smartphones, TV screens and so on. But in order to make further progress in developing optics technology, natural materials are no longer adequate. Artificial speciality materials, known as optomechanical metamaterials, are needed to circumvent the limitations inherent in natural materials. The research involves studying and designing artificial materials in order to develop properties which enable these materials to manipulate electromagnetic waves – ranging from microwaves through terahertz waves to visible light. The researchers design the materials by allowing small electric circuits to replace atoms as the underlying building blocks for the interaction of electromagnetic waves with matter. These structured electromagnetic materials allow components to be designed that can exert high-level control over light with a high degree of precision. <br /></div></div> <div> </div> <h4 class="chalmersElement-H4">For more information:</h4> <div><a href="/en/Staff/Pages/Philippe-Tassin.aspx">Philippe Tassin</a>, Associate Professor, Department of Physics, Chalmers</div> <div><a href="/en/staff/Pages/viaene.aspx">Sophie Viaene</a>, Researcher, Department of Physics, Chalmers<br /></div>Thu, 28 Jun 2018 07:00:00 +0200https://www.chalmers.se/en/departments/mc2/news/Pages/Graphene-assembled-film-shows-higher-thermal-conductivity-than-graphite-film.aspxhttps://www.chalmers.se/en/departments/mc2/news/Pages/Graphene-assembled-film-shows-higher-thermal-conductivity-than-graphite-film.aspxGraphene assembled film shows higher thermal conductivity than graphite film<p><b>​Researchers at Chalmers University of Technology, Sweden, have developed a graphene assembled film that has over 60 percent higher thermal conductivity than graphite film – despite the fact that graphite simply consists of many layers of graphene. The graphene film shows great potential as a novel heat spreading material for form-factor driven electronics and other high power-driven systems.</b></p><div><span style="background-color:initial">Until now, scientists in the graphene research community have assumed that graphene assembled film cannot have higher thermal conductivity than graphite film. Single layer graphene has a thermal conductivity between 3500 and 5000 W/mK. If you put two graphene layers together, then it theoretically becomes graphite, as graphene is only one layer of graphite.</span><br /></div> <div><br /></div> <div>Today, graphite films, which are practically useful for heat dissipation and spreading in mobile phones and other power devices, have a thermal conductivity of up to 1950 W/mK. Therefore, the graphene-assembled film should not have higher thermal conductivity than this. </div> <div><br /></div> <div>Research scientists at Chalmers University of Technology have recently changed this situation. They discovered that the thermal conductivity of graphene assembled film can reach up to 3200 W/mK, which is over 60 percent higher than the best graphite films.</div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/jliu_2016_350x305.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />Professor Johan Liu (to the right) and his research team have done this through careful control of both grain size and the stacking orders of graphene layers. The high thermal conductivity is a result of large grain size, high flatness, and weak interlayer binding energy of the graphene layers. With these important features, phonons, whose movement and vibration determine the thermal performance, can move faster in the graphene layers rather than interact between the layers, thereby leading to higher thermal conductivity. </div> <div>“This is indeed a great scientific break-through, and it can have a large impact on the transformation of the existing graphite film manufacturing industry”, says Johan Liu.</div> <div><br /></div> <div>Furthermore, the researchers discovered that the graphene film has almost three times higher mechanical tensile strength than graphite film, reaching 70 MPa.  </div> <div>“With the advantages of ultra-high thermal conductivity, and thin, flexible, and robust structures, the developed graphene film shows great potential as a novel heat spreading material for thermal management of form-factor driven electronics and other high power-driven systems”, says Johan Liu.</div> <div><br /></div> <div>As a consequence of never-ending miniaturization and integration, the performance and reliability of modern electronic devices and many other high-power systems are greatly threatened by severe thermal dissipation issues.</div> <div>“To address the problem, heat spreading materials must get better properties when it comes to thermal conductivity, thickness, flexibility and robustness, to match the complex and highly integrated nature of power systems”, says Johan Liu. “Commercially available thermal conductivity materials, like copper, aluminum, and artificial graphite film, will no longer meet and satisfy these demands.”</div> <div><br /></div> <div>The IP of the high-quality manufacturing process for the graphene film belongs to SHT Smart High Tech AB, a spin-off company from Chalmers, which is going to focus on the commercialization of the technology.</div> <div><br /></div> <h5 class="chalmersElement-H5">More about the research</h5> <div>The work has been done in collaboration with research teams at Uppsala University and SHT Smart High Tech AB in Sweden, Shanghai and Tongji University in China and University of Colorado Boulder in USA.</div> <div><br /></div> <div><strong>The paper is published online in the well-known scientific journal Small, with the weblink: </strong><a href="https://onlinelibrary.wiley.com/doi/full/10.1002/smll.201801346">onlinelibrary.wiley.com/doi/full/10.1002/smll.201801346</a></div> <div> </div> <div><strong>Related publications:</strong> </div> <div>Nat. Commun. 7:11281 doi: 10.1038/ncomms11281 (2016). <a href="http://www.nature.com/ncomms/2016/160429/ncomms11281/full/ncomms11281.html">www.nature.com/ncomms/2016/160429/ncomms11281/full/ncomms11281.html</a></div> <div>Carbon 106 (2016) 195-201, <a href="http://dx.doi.org/10.1016/j.carbon.2016.05.014">dx.doi.org/10.1016/j.carbon.2016.05.014</a> </div> <div>Carbon 61 (2013) 342-348,<a href="http://dx.doi.org/10.1016/j.carbon.2013.05.014">dx.doi.org/10.1016/j.carbon.2013.05.014​</a></div> <div>Advanced Materials, DOI: 10.1002/adma.201104408)</div> <div><br /></div> <h5 class="chalmersElement-H5">More about the graphene film</h5> <div>The manufacturing method of the graphene film is based on simultaneous graphene oxide film formation and reduction, on aluminum substrate, dry-bubbling film separation, followed by high-temperature treatment as well as mechanical pressing. These conditions enable the formation of the graphene film with large grain size, good atomic alignment, thin-film structure, and low interlayer binding energy. All these features have great benefit for the transfer of both high-frequency diffusive phonons and low-frequency ballistic phonons, and thereby lead to the improvement of in-plane thermal conductivity of the graphene film. Phonons are quantum particles that describe the thermal conductivity of a material.</div> <div><br /></div> <h5 class="chalmersElement-H5">For further information, please contact:</h5> <div>Johan Liu, Professor at the Department of Microtechnology and Nanoscience <span style="background-color:initial">–</span><span style="background-color:initial"> MC2, Chalmers University of Technology, Sweden, +46 31 772 30 67, </span><a href="mailto:jliu@chalmers.se">jliu@chalmers.se​</a></div> <span></span><div></div> <div><br /></div> <div>Photo Source: Johan Liu/Krantz Nanoart</div> Thu, 21 Jun 2018 13:00:00 +0200https://www.chalmers.se/en/departments/physics/news/Pages/Summer-course-with-focus-on-nuclear-safety.aspxhttps://www.chalmers.se/en/departments/physics/news/Pages/Summer-course-with-focus-on-nuclear-safety.aspxInteractive summer course with a focus on nuclear safety<p><b></b></p><div>Since last year, Chalmers University of Technology is coordinating the research and innovation project Cortex to improve nuclear power safety. On 18-21 June 2018, about 30 young researchers from Europe, the US and Asia took part in a summer course at Chalmers, organised by <a href="/en/Staff/Pages/Christophe-Demazière.aspx">Professor Christophe Demazière </a>. </div> <div><br /></div> <div>The topic was reactor dynamics with a focus on nuclear safety. About half of the participants were on-site, at the Department of Physics at Chalmers. The other participants took part in the activities via distance education, thanks to a multimedia room at the department. In addition, an innovative pedagogical format relying on flipped classrooms and adapted to both the on-site and off-site audiences was used throughout the course.</div> <br /><div><a href="/en/departments/physics/news/Pages/Chalmers-gets-5,1-M€-to-improve-nuclear-safety.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Read the news article &quot;Chalmers gets 5,1 MSEK to improve nuclear safety&quot;.</a>  <br /></div> <div><a href="http://cortex-h2020.eu/"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more about the project at Cortex webpage. <br /></a></div> <div><a href="https://www.linkedin.com/company/cortex-h2020/"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Follow Cortex on LinkedIn.</a><br /><a href="http://cortex-h2020.eu/"></a></div>Thu, 21 Jun 2018 00:00:00 +0200https://www.chalmers.se/en/departments/physics/news/Pages/Ground-breaking-discoveries-could-create-tougher-alloys-with-many-applications.aspxhttps://www.chalmers.se/en/departments/physics/news/Pages/Ground-breaking-discoveries-could-create-tougher-alloys-with-many-applications.aspxSuperior alloys could be possible, thanks to ground-breaking research<p><b>Many current and future technologies require alloys that can withstand high temperatures​ without corroding. Now, researchers at Chalmers University of Technology, Sweden, have hailed a major breakthrough in understanding how alloys behave at high temperatures, pointing the way to significant improvements in many technologies. The results are published in the highly ranked journal Nature Materials.​</b></p><div style="font-size:14px"><div><span>Developing alloys that can withst​and high temperatures without corroding is a key challenge for many fields, such as renewable and sustainable energy technologies like concentrated solar power and solid oxide fuel cells, as well as aviation, materials processing and petrochemistry. </span></div> <span> </span><div><span><br /></span> </div> <span> </span><div><span>At high temperatures, alloys can react violently with their environment, quickly causing the materials to fail by corrosion. To protect against this, all high temperature alloys are designed to form a protective oxide scale, usually consisting of aluminium oxide or chromium oxide. This oxide scale plays a decisive role in preventing the metals from corroding. Therefore, research on high temperature corrosion is very focused on these oxide scales – how they are formed, how they perform at high heat, and how they sometimes fail.</span></div> <span> </span><div><span>The article in Nature Materials answers two classical issues in the area. One applies to the very small additives of so-called ‘reactive elements’ – often yttrium and zirconium – found in all high-temperature alloys. The second issue is about the role of water vapour.</span></div> <div><span style="font-size:10.66px"> </span></div></div> <div><img class="chalmersPosition-FloatRight" src="/SiteCollectionImages/Institutioner/F/350x305/TItan%20Microscope.jpg" alt="" style="margin:5px" /><span style="font-size:10.66px"><span style="background-color:window"> <span style="font-size:14px">“Adding reactive elements to alloys results in a huge improvement in performance – but no one has been able to provide robust experimental proof why,” says Nooshin Mortazavi, materials researcher at Chalmers’ Department of Physics, and first author of the study. “Likewise, the role of water, which is always present in high-temperature environments, in the form of steam, has been little understood. Our paper will help solve these enigmas”. </span></span></span></div> <div><span style="font-size:10.66px"><span style="background-color:window"><span style="font-size:14px"><br /></span></span></span> </div> <span style="font-size:14px"> </span><span style="font-size:14px"></span><div style="font-size:14px"><span>In this paper, the Chalmers researchers show how these two elements are linked. They demonstrate how the reactive elements in the alloy promote the growth of an aluminium oxide scale. The presence of these reactive element particles causes the oxide scale to grow inward, rather than outward, thereby facilitating the transport of water from the environment, towards the alloy substrate. Reactive elements and water combine to create a fast-growing, nanocrystalline, oxide scale. </span></div> <div style="font-size:14px"><span><br /></span> </div> <span style="font-size:14px"> </span><div style="font-size:14px"><span>“This paper challenges several accepted ‘truths’ in the science of high temperature corrosion and opens up exciting new avenues of research and alloy development,” says Lars Gunnar Johansson, Professor of Inorganic Chemistry at Chalmers, Director of the Competence Centre for High Temperature Corrosion (HTC) and co-author of the paper. </span></div> <div style="font-size:14px"><span><br /></span> </div> <span style="font-size:14px"> </span><div style="font-size:14px"><span>“Everyone in the industry has been waiting for this discovery. This is a paradigm shift in the field of high-temperature oxidation,” says Nooshin Mortazavi. “We are now establishing new principles for understanding the degradation mechanisms in this class of materials at very high temperatures.” </span></div> <div style="font-size:14px"><span><br /></span> </div> <span style="font-size:14px"> </span><div style="font-size:14px"><span>Further to their discoveries, the Chalmers researchers suggest a practical method for creating more resistant alloys. They demonstrate that there exists a critical size for the reactive element particles. Above a certain size, reactive element particles cause cracks in the oxide scale, that provide an easy route for corrosive gases to react with the alloy substrate, causing rapid corrosion. This means that a better, more protective oxide scale can be achieved by controlling the size distribution of the reactive element particles in the alloy.</span></div> <span style="font-size:14px"> </span><div style="font-size:14px"><span>This ground-breaking research from Chalmers University of Technology points the way to stronger, safer, more resistant alloys in the future. </span></div> <div><br /> </div> <div>Text: Joshua Worth and Johanna Wilde</div> <div>Image: Johan Bodell</div> <div>Caption (the image in the text above): Nooshin Mortazavi and the Titan TEM microscope, which was used to investigate the nanocrystalline oxide forming on high-temperature alloys.  ​​<br /></div> <div><br /> </div> <a href="https://www.nature.com/articles/s41563-018-0105-6"></a><a href="https://www.nature.com/articles/s41563-018-0105-6"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" /></a><div style="display:inline !important"><a href="https://www.nature.com/articles/s41563-018-0105-6">Read the scientific paper <span style="background-color:initial"><em>Interplay of water and reactive eleme</em></span><span style="background-color:initial"><em>nts in oxidation of alumina-forming alloys</em> </span></a><span style="background-color:initial"><a href="https://www.nature.com/articles/s41563-018-0105-6">in Nature Materials.</a></span></div> <div><div><a href="http://www.mynewsdesk.com/uk/chalmers/pressreleases/ground-breaking-discoveries-could-create-superior-alloys-with-many-applications-2546991"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read the press release from Chalmers University of Technology and download high-resolution images. ​</a></div> <h4 class="chalmersElement-H4">More about: Potential consequences of the research breakthrough</h4> <div>High temperature alloys are used in a variety of areas, and are essential to many technologies which underpin our civilisation. They are crucial for both new and traditional renewable energy technologies, such as &quot;green&quot; electricity from biomass, biomass gasification, bio-energy with carbon capture and storage (BECCS), concentrated solar energy, and solid oxide fuel cells. They are also crucial in many other important technology areas such as jet engines, petrochemistry and materials processing.</div> <div>All these industries and technologies are entirely dependent on materials that can withstand high temperatures – 600 ° C and beyond – without failing due to corrosion. There is a constant demand for materials with improved heat resistance, both for developing new high temperature technologies, and for enhancing the process efficiency of existing ones. </div> <div>For example, if the turbine blades in an aircraft's jet engines could withstand higher temperatures, the engine could operate more efficiently, resulting in fuel-savings for the aviation industry. Or, if you can produce steam pipes with better high-temperature capability, biomass-fired power plants could generate more power per kilogram of fuel. </div> <div>Corrosion is one of the key obstacles to material development within these areas. The Chalmers researchers' article provides new tools for researchers and industry to develop alloys that withstand higher temperatures without quickly corroding. </div> <div><br /> </div> <h4 class="chalmersElement-H4">More About: The Research</h4> <div>The Chalmers researchers’ explanation of how oxide scale growth occurs – which has been developed using several complementary methods for experimentation and quantum chemistry modelling – is completely new to both the research community, and the industry in the field of high-temperature materials.</div> <div>The research was carried out by the High Temperature Corrosion Center (HTC) (www.htc.chalmers.se) in a collaboration between the Departments of Chemistry and Physics at Chalmers, together with the world leading materials manufacturer Kanthal, part of the Sandvik group. HTC is jointly funded by the Swedish Energy Agency, 21 member-companies and Chalmers. </div> <div>The paper was published in the highly prestigious journal <a href="https://www.nature.com/articles/s41563-018-0105-6">Nature Materials​</a>. </div> <div><br /><br /></div> <h5 class="chalmersElement-H5">Related news: ​</h5> <div><a href="/en/departments/ims/news/Pages/on-the-quest-for-high-entropy-alloys.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />On the quest for high-entropy alloys that survive 1500 °C ​​</a><br /></div> <div style="display:inline !important"><span style="background-color:initial"><a href="https://www.nature.com/articles/s41563-018-0105-6"></a></span> </div> <div><img src="/SiteCollectionImages/Institutioner/F/750x340/Nooshin%20WEB.jpg" alt="" style="margin:5px" /><br />Nooshin Mortazavi is a postdoctoral researcher in the Department of Physics at Chalmers University of Technology, Sweden. <a href="/en/departments/physics/news/Pages/Materials-scientists-wins-two-prestigious-fellowships-------.aspx">She was recently awarded prestigious fellowships by the Wenner-Gren Foundation and the Wallenberg Foundation. ​</a><span style="background-color:initial">She can now choose between two or three years of postdoctoral training at either Harvard University or at Stanford University in the US – followed by two years at Chalmers Univ</span><span style="background-color:initial">​ersity. </span></div> <div><br /> </div> <h4 class="chalmersElement-H4">For more information: </h4> <div><div><a href="/en/Staff/Pages/Nooshin-Mortazavi-Seyedeh.aspx">Nooshin Mortazavi​</a>, Postdoctoral researcher, Department of Physics, Chalmers University of Technology, , +46 73 387 32 26, +46 31 772 67 83, <span style="background-color:initial">nooshin.mortazavi@chalmers.se</span><span style="background-color:initial"> </span></div> <div><a href="/en/Staff/Pages/lg.aspx">Lars-Gunnar Johansson</a>, Professor, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, +46 31 772 28 72, <span style="background-color:initial">lg@chalmers.se,​</span></div> </div></div>Tue, 19 Jun 2018 07:00:00 +0200