Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session G00: Poster Session I (2pm- 5pm CST)
2:00 PM,
Tuesday, March 15, 2022
Room: McCormick Place Exhibit Hall F1
Abstract: G00.00149 : Imaging Atomic-Scale Chemistry from Fused Multi-Modal Electron Microscopy
Presenter:
Jonathan Schwartz
(University of Michigan)
Authors:
Jonathan Schwartz
(University of Michigan)
Zichao Wendy Di
(Argonne National Laboratory)
Yi Jiang
(Argonne National Laboratory)
Alyssa Fielitz
(Dow Chemical)
Don-Hyung Ha
(Chung-Ang University)
Sanjaya D Perera
(Cornell University)
Ismail Baggari
(Harvard University)
Jeffery A Fessler
(University of Michigan)
Colin L Ophus
(Lawrence Berkeley National Laboratory)
Steve Rozeveld
(Dow Chemical)
Robert Hovden
(University of Michigan)
Here we introduce multi-modal electron microscopy, a technique that offers high SNR recovery (500% increase in favorable cases) of nanoscale material chemistry by leveraging correlated information encoded within both high-angle annular dark field (HAADF) and EDX / EELS. In all cases, Poisson noise in the raw chemical maps is virtually eliminated while maintaining structure at atomic resolution and notably lower electron doses than traditional approaches. Moreover, our multi-modal approach also recovers the specimen’s chemical relative concentration, allowing researchers to measure local stoichiometry.
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