12:30 - 12:50 Ermes Peci, Postdoc, PhotoConversion Materials, VU Amsterdam
Titel:
Abstract:
12:50 -13:45 Kartik Ayyer, Max Plank Institute for the Structure and Dynamics of Matter, Hamburg
Titel: Serial diffractive imaging to study nanoscale structural dynamics
Abstract: X-ray free electron lasers provide a unique opportunity to measure ultrafast, high resolution dynamics using diffractive imaging methods. In particular, I will focus on measurements on ensembles of nanosystems where the high peak brightness enables a serial (one-at-a-time) imaging approach which, when combined with modern machine learning analysis algorithms, provides much richer information than conventional ensemble measurements. Building upon our proof-of-concept studies understanding the structural landscape of gold nanoparticles [1, 2], I will talk about three problems where we use this method to observe hitherto unseen properties of nanosystems, (i) large polaron formation in CsPbBr3 quantum dots [3], (ii) dehydration dynamics on MS2 bacteriophage capsids using deep learning [4,5] and (iii) plasmon-induced structural deformations of gold nanorods. Finally, I will discuss the possibility of using such an approach to observe ultrafast dynamics where precise optical triggering is not possible.
References:
1. Ayyer, et al. Optica, 8(1), 15-23 (2021).
2. Shen, et al. ACS Nano, 18, 24, 15576-15589 (2024).
3. Shen, et al. ACS Nano 19, 31, 28372-28382 (2025).
4. Mall, et al. arXiv:2407.11687 (2024).
5. Zhuang et al. IUCrJ 9(2), 204-214 (2022).