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Atomically resolved tomographic reconstruction of nanoparticles from single projection: Influence of amorphous carbon support.

Authors
  • Banerjee, Pritam1
  • Roy, Chiranjit1
  • De, Subhra Kanti1
  • Santos, Antonio J2
  • Morales, Francisco M2
  • Bhattacharyya, Somnath3
  • 1 Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036, India. , (India)
  • 2 IMEYMAT: Institute of Research on Electron Microscopy and Materials, University of Cádiz, Cádiz, Spain; Department of Materials Science and Metallurgic Engineering, and Inorganic Chemistry, Faculty of Sciences, University of Cádiz, Puerto Real, 11510Cádiz, Spain. , (Spain)
  • 3 Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036, India. Electronic address: [email protected] , (India)
Type
Published Article
Journal
Ultramicroscopy
Publication Date
Nov 23, 2020
Volume
221
Pages
113177–113177
Identifiers
DOI: 10.1016/j.ultramic.2020.113177
PMID: 33290981
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Nanoparticles have a wide range of applications due to their unique geometry and arrangement of atoms. For a precise structure-property correlation, information regarding atomically resolved 3D structures of nanoparticles is utmost beneficial. Though modern aberration-corrected transmission electron microscopes can resolve atoms with the sub-angstrom resolution, an atomic-scale 3D reconstruction of a nanoparticle using Scanning Transmission Electron Microscopy (STEM) based tomographic method faces hurdles due to high electron irradiation damage and "missing-wedge". Instead, inline 3D holography based tomographic reconstructions from single projection registered at low electron doses is more suitable for defining atomic positions at nanostructures. Nanoparticles are generally supported on amorphous carbon film for Transmission Electron Microscopy (TEM) experiments. However, neglecting the influence of carbon film on the tomographic reconstruction of the nanoparticle may lead to ambiguity. To address this issue, the effect of amorphous carbon support was quantitatively studied using simulations and experiments and it was revealed that increasing thickness and/or density of carbon support increases distortion in tomograms. Copyright © 2020 Elsevier B.V. All rights reserved.

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