Join us Tuesday, January 28, to hear from Professor Jungwon Park, Seoul National University, on ‘Visualizing Materials Chemistry by Real-Time Liquid Electron Microscopy’. During the seminar, studies of nucleation, crystallization, and morphological transformations in nanomaterials such as heterogeneous catalysts, electrolytes and battery systems will be presented.
Coffee will be served from 15.00. The seminar starts at 15.15.
Översikt
- Datum:Startar 28 januari 2025, 15:00Slutar 28 januari 2025, 16:00
- Plats:Luftbryggan, 2 building. Entrance from Kemivägen 9. Take staircase A. Go to floor 8. Chalmers Campus Johanneberg.
- Språk:Engelska
Abstract
Understanding the molecular and atomistic mechanisms underlying the synthesis, structure, and reactions of materials requires investigation at the nanoscale or below, a challenging task due to limited analytical methods capable of capturing in-situ structural information at such resolutions. Advanced in-situ transmission electron microscopy (TEM), including techniques like liquid-phase, electrochemical biasing, and cryo-TEM, offers unique opportunities to directly observe diverse chemical reactions at this scale.
In this talk, we present applications of in-situ TEM for studying nucleation, crystallization, and morphological transformations in various nanomaterials. Our findings reveal multiple non-classical pathways in material formation and crystallization, including two-step nucleation, amorphous-to-crystalline transitions, and cluster coalescence.
We also introduce a novel method combining liquid-phase TEM with computational reconstruction, enabling direct 3D atomic-scale structure mapping of single particles in solution. This approach allows us to link atomic structures with the functional properties of nanomaterials. Furthermore, we demonstrate how electrochemical liquid-phase TEM provides insights into key interfacial reactions between heterogeneous catalysts and electrolytes. Real-time observations using liquid, gas, and cryo-TEM further extend these studies to electrode processes in various battery systems.
Biography
Prof. Park is currently an Associate Professor at Seoul National University, Seoul, Korea. His research field of interest is physical chemistry of nanomaterials and in situ electron microscopy. He started his professional career as an Assistant Professor in the School of Chemical and Biological Engineering at Seoul National University (2016-present), after a postdoc and a research associate at the School of Engineering and Applied Sciences, Harvard University. He is jointly affiliated in the Center for Nanoparticle Research, Institute for Basic Science, as a Research Associate.
He has received various prestige awards such as Korea Presidential Award for Young Scientists in 2020, The 3rd Hanseong Science Award in 2020, and Wiley-KCS Young Chemist Award in 2021. He serves as an advisory board member for iScience, cell press and an early career advisory board member for ChemNanoMat (Wiley). He received the B.S. degree from the department of Chemistry at POSTECH, Korea in 2003. He then received the Ph.D. from the department of Chemistry at the University of California, Berkeley in 2012.
