Journal Article

FZJ-2021-01630

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Combining Quantitative ADF STEM with SiNx Membrane-Based MEMS Devices: A Simulation Study with Pt Nanoparticles

MacArthur, K. E. (Corresponding author)FZJ* ; Clement, A. ; Heggen, M.FZJ* ; Dunin-Borkowski, R. E.FZJ*

2021
Elsevier Science Amsterdam

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Please use a persistent id in citations: http://hdl.handle.net/2128/29349  doi:10.1016/j.ultramic.2021.113270

Abstract: Computer simulations are used to assess the influence of a 20-nm-thick SiNx membrane on the quantification of atomic-resolution annular dark-field (ADF) scanning transmission electron microscopy images of Pt nanoparticles. The discussions include the effect of different nanoparticle/membrane arrangements, accelerating voltage, nanoparticle thickness and the presence of adjacent atomic columns on the accuracy with which the number of Pt atoms in each atom column can be counted. The results, which are based on the use of ADF scattering cross-sections, show that an accuracy of better than a single atom is attainable at 200 and 300 kV. At 80kV, the scattering in a typical SiNx membrane is sufficiently strong that the best possible atom counting accuracy is reduced to +/- 2 atoms. The implications of the work for quantitative studies of Pt nanoparticles imaged through SiNx membranes are discussed.

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Contributing Institute(s):

1. Physik Nanoskaliger Systeme (ER-C-1)

Research Program(s):

1. 535 - Materials Information Discovery (POF4-535) (POF4-535)
2. DFG project 257727131 - Nanoskalige Pt Legierungselektrokatalysatoren mit definierter Morphologie: Synthese, Electrochemische Analyse, und ex-situ/in-situ Transmissionselektronenmikroskopische (TEM) Studien (257727131) (257727131)

Appears in the scientific report 2021

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