Probing and quantifying atomic scale surface dynamics with ETEM

In this DENSsolutions Wildfire webinar we welcome Dr. Pei Liu from the Technical University of Denmark - DTU.

Simply enter your email address above and click "Register now" to register. You will receive an email directly after with a link to access the webinar.

Abstract

The functionality of nanomaterials relies on the dynamic atomic structure, which strongly correlates to a physical or chemical stimulus. The systematic understanding of the mechanisms and energetics involved when atoms or small clusters diffuse over surfaces is of vital fundamental and technological interest. Specifically, probing and quantifying the complex surface dynamics temporally and atomically will deepen our knowledge of the sustainable development of new materials and catalytic processes.

During this webinar, Dr. Pei Liu will present observations of various types of surface dynamics on a model Au / CeO2 system under different conditions relating to the surrounding atmosphere and temperature. She will discuss different types of reversible and concerted atom diffusion on Au nanoparticle surfaces and the motion of the nanoparticles on the oxide support, including the kinetics of these surface dynamics. Furthermore, she will share her experiences of using two advanced methods for image data quantifications:

1. A machine learning assisted atom column identification method on time series TEM for column jumping quantification;
2. A model-based atom counting method on a single HRSTEM image for 3D shape reconstruction.

We invite you to join this webinar to explore the probing and quantifying of atomic scale surface dynamics, and learn how our Wildfire system can take your research to the next level.