Lab on a beam—Big data and artificial intelligence in scanning transmission electron microscopy

MRS Bulletin ◽  
2019 ◽  
Vol 44 (7) ◽  
pp. 565-575 ◽  
Author(s):  
Sergei V. Kalinin ◽  
Andrew R. Lupini ◽  
Ondrej Dyck ◽  
Stephen Jesse ◽  
Maxim Ziatdinov ◽  
...  
Keyword(s):  
Artificial Intelligence ◽  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Big Data ◽  
Scanning Transmission Electron Microscopy ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Image Position

Abstract

Periodic Cation Segregation in Cs0.44[Nb2.54W2.46O14] Quantified by High-Resolution Scanning Transmission Electron Microscopy

2014 ◽  
Vol 20 (5) ◽  
pp. 1453-1462 ◽  
Author(s):  
Markus Heidelmann ◽  
Juri Barthel ◽  
Gerhard Cox ◽  
Thomas E. Weirich
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Scanning Transmission Electron Microscopy ◽  
Intensity Variation ◽  
Unit Cell ◽  
M1 Phase ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Image Position

AbstractThe atomic structure of Cs0.44[Nb2.54W2.46O14] closely resembles the structure of the most active catalyst for the synthesis of acrylic acid, the M1 phase of ${\rm Mo}_{{{\rm 10}}} {\rm V}_{{\rm 2}}^{{{\rm 4{\plus}}}} {\rm Nb}_{2} {\rm TeO}_{{{\rm 42}{\minus}x}} $ . Consistently with observations made for the latter compound, the high-angle electron scattering signal recorded by scanning transmission electron microscopy shows a significant intensity variation, which repeats periodically with the projected crystallographic unit cell. The occupation factors for the individual mixed Nb/W atomic columns are extracted from the observed intensity variations. For this purpose, experimental images and simulated images are compared on an identical intensity scale, which enables a quantification of the cation distribution. According to our analysis specific sites possess low tungsten concentrations of 25%, whereas other sites have tungsten concentrations above 70%. These findings allow us to refine the existing structure model of the target compound, which has until now described a uniform distribution of the niobium and tungsten atoms in the unit cell, showing that the similarity between Cs0.44[Nb2.54W2.46O14] and the related catalytic compounds also extends to the level of the cation segregation.

scholarly journals In situ electrochemical scanning/transmission electron microscopy of electrode–electrolyte interfaces

MRS Bulletin ◽  
2020 ◽  
Vol 45 (9) ◽  
pp. 738-745
Author(s):  
Raymond R. Unocic ◽  
Katherine L. Jungjohann ◽  
B. Layla Mehdi ◽  
Nigel D. Browning ◽  
Chongmin Wang
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Scanning Transmission Electron Microscopy ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Image Position

Abstract

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