|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Seeing is Believing -- Understanding Environmental Degradation and Mechanical Response Using Advanced Characterization Techniques: An SMD Symposium in Honor of Ian M. Robertson
||Experiments in an Environmental Transmission Electron Microscope: Challenges And Solutions
||Renu Sharma, Wei-Chang (David) Yang
|On-Site Speaker (Planned)
Pioneering work on the in situ observation of gas-solid interactions at elevated temperatures, including instrument development, occurred during 1950-1980. In the nineties, the differential pumping system for in situ observation of gas-solid interactions, proposed by Swann and Tighe, was further developed and is now implemented in commercially-available environmental transmission/scanning transmission electron microscopes (ETEM/ESTEM). In recent years ESTEM, has been successfully employed to reveal the structural and chemical changes occurring in nanomaterials in reactive environments. However, quantitative measurements are limited by (a) the nanoscale regions needed for atomic-resolution imaging, (b) uncertainty in the temperature of the imaged region and (c) difficulty in analyzing the large quantities of data.
We have addressed these challenges by incorporating Raman spectrometer in ESTEM and developed algorithms for accurate phase identification using FFT, for image drift correction, noise reduction, and peak location to accurate and automatic determinization of the position of atomic columns.
||Nanotechnology, Characterization, Environmental Effects