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05.09.2022 - 09.09.2022, Iseolago hotel, Iseo, Italy.

News

MUST2022 Conference- a great success!
New scientific highlights- by MUST PIs Wörner, Chergui, and Richardson
FELs of Europe prize for Jeremy Rouxel- “Development or innovative use of advanced instrumentation in the field of FELs”
Ruth Signorell wins Doron prizefor pioneering contributions to the field of fundamental aerosol science
New FAST-Fellow Uwe Thumm at ETH- lectures on Topics in Femto- and Attosecond Science
International Day of Women and Girls in Science- SSPh asked female scientists about their experiences
New scientific highlight- by MUST PIs Milne, Standfuss and Schertler
EU XFEL Young Scientist Award for Camila Bacellar,beamline scientist and group leader of the Alvra endstation at SwissFEL
Prizes for Giulia Mancini and Rebeca Gomez CastilloICO/IUPAP Young Scientist Prize in Optics & Ernst Haber 2021
Nobel Prize in Chemistry awarded to RESOLV Member Benjamin List- for the development of asymmetric organocatalysis
NCCR MUST at Scientifica 2021- Lightning, organic solar cells, and virtual molecules
#NCCRWomen- NCCR MUST celebrates 50 years women’s right to vote in Switzerland

Ultrafast Electron Microscopy: a New Tool to Study Chemical Dynamics at the Nanoscale

Date Mo, 22.10.2018 - Mo, 22.10.2018
Time 14:00
Speaker Prof. Renske van der Veen, University of Illinois, Urbana Champaign
Location ETH Hönggerberg, HCI J243
Program The advancement of techniques that can probe the behavior of individual nanoscale objects is of paramount importance in various disciplines, including photonics, electronics, catalysis and data storage. Ultrafast electron microscopy (UEM) combines the time resolution of time-resolved optical spectroscopy with the excellent spatial resolution of electron microscopy techniques. The structural and electronic changes in the material are initiated by short (fs, ps, ns) laser pulses, which are followed by similarly short electron pulses for probing the dynamics by means of imaging, diffraction, or energy-loss spectroscopy (EELS) within the electron microscope. The inherent spatial resolution and imaging capabilities of transmission electron microscopy (TEM) are ideal to pinpoint individual nanostructures and to investigate size effects and the influence of the surroundings. Here, I will present our results on the ultrafast photoinduced spin-state switching of metalorganic nanoparticles, demonstrating for the first time the unique sensitivity and selectivity of UEM for the in situ visualization of single-nanoparticle dynamics. Electron diffraction and real-space imaging were used to follow the unit cell expansion/contraction, and morphology changes accompanying the spin-state change. In the second part of my seminar, I will present the first implementation of ultrafast core-electron energy-loss spectroscopy in UEM as an element-specific probe of nanoscale dynamics by using the femtosecond and nanosecond resolved dynamics of a graphite thin film as a test case example. Finally, an overview and update will be given on the development of a dynamic environmental TEM apparatus at the University of Illinois.

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