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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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Ursula Keller wins “Swiss Nobel” Marcel Benoist Prize
Farewell: the NCCR MUST ended 
MUST2022 Conference
New scientific highlights
FELs of Europe prize for Jeremy Rouxel
Ruth Signorell wins Doron prize
New FAST-Fellow Uwe Thumm at ETH
International Day of Women and Girls in Science
New scientific highlight
EU XFEL Young Scientist Award for Camila Bacellar,
Prizes for Giulia Mancini and Rebeca Gomez Castillo
Nobel Prize in Chemistry awarded to RESOLV Member Benjamin List
Hans Jakob Wörner invited to give the „New Horizons Solvay Lectures” 
Unusual keynote talk at an international scientific conference
NCCR MUST at Scientifica 2021
