Argonne National Laboratory

Upcoming Events

Visualizing Nanoscale Dynamics in Liquids with High Spatial and Temporal Resolution Using Liquid Cell TEM

NST Seminar
See Wee, National University of Singapore
August 15, 2017 11:00AM to 12:00PM
Building 440, Room A105-106

Abstract: Liquid-cell transmission electron microscopy is a powerful technique that allows to us visualize phenomena that take place in a liquid environment with the resolving power of a transmission electron microscope (TEM). In this presentation, I will show two examples of how liquid-cell TEM can be used to study chemical reactions involving nanoparticles and the dynamics of nanoparticles. First, I will discuss results from experiments where we followed the microstructural evolution of silver nanocubes as they undergo galvanic replacement with gold ions to understand mechanisms behind hollow structure formation. Then, I will talk about how we can track both the translation and rotation of nanoparticles contained within these liquid cells with temporal resolution of a few milliseconds. Lastly, I will discuss the potential impact of high-speed direct electron cameras on the field. In particular, I will touch on the strategies we are developing at the Center for BioImaging Sciences to achieve low-electron-dose imaging conditions for our experiments and the challenges in working with the large datasets that result from these experiments.