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Title: Growth of Au on Pt Icosahedral Nanoparticles Revealed by Low-Dose In Situ TEM

Abstract

A growth mode was revealed by an in situ TEM study of nucleation and growth of Au on Pt icosahedral nanoparticles. Quantitative analysis of growth kinetics was carried out based on real- time TEM data, which show the process involves: 1) deposition of Au on corner sites of Pt icosahedral nanoparticles, 2) diffusion of Au from corners to terraces and edges, and 3) subsequent layer-by-layer growth of Au on Au surfaces to form Pt@Au core-shell nanoparticles. The in situ TEM results indicate diffusion of Au from corner islands to terraces and edges is a kinetically controlled growth, as evidenced by a measurement of diffusion coefficients for these growth processes. We demonstrated that in situ electron microscopy is a valuable tool for quantitative study of nucleation and growth kinetics and can provide new insight into the design and precise control of heterogeneous nanostructures.

Authors:
 [1];  [2];  [3];  [3];  [4];  [2];  [5]
  1. Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, 1304 West Green Street, Urbana, Illinois 61801, United States; Department of Chemical &, Biomolecular Engineering, University of Illinois at Urbana−Champaign, MC-712, 600 South Mathews Avenue, Urbana, Illinois 61801, United States; Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana−Champaign, 104 South Goodwin Avenue, Urbana, Illinois 61801, United States
  2. Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, 1304 West Green Street, Urbana, Illinois 61801, United States; Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana−Champaign, 104 South Goodwin Avenue, Urbana, Illinois 61801, United States
  3. Electron Microscopy Center - Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
  4. Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
  5. Department of Chemical &, Biomolecular Engineering, University of Illinois at Urbana−Champaign, MC-712, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
OSTI Identifier:
1391800
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 15; Journal Issue: 4; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
flow cell; In situ TEM; growth; nanoparticle; platinum

Citation Formats

Wu, Jianbo, Gao, Wenpei, Wen, Jianguo, Miller, Dean J., Lu, Ping, Zuo, Jian-Min, and Yang, Hong. Growth of Au on Pt Icosahedral Nanoparticles Revealed by Low-Dose In Situ TEM. United States: N. p., 2015. Web. doi:10.1021/acs.nanolett.5b00414.
Wu, Jianbo, Gao, Wenpei, Wen, Jianguo, Miller, Dean J., Lu, Ping, Zuo, Jian-Min, & Yang, Hong. Growth of Au on Pt Icosahedral Nanoparticles Revealed by Low-Dose In Situ TEM. United States. https://doi.org/10.1021/acs.nanolett.5b00414
Wu, Jianbo, Gao, Wenpei, Wen, Jianguo, Miller, Dean J., Lu, Ping, Zuo, Jian-Min, and Yang, Hong. Mon . "Growth of Au on Pt Icosahedral Nanoparticles Revealed by Low-Dose In Situ TEM". United States. https://doi.org/10.1021/acs.nanolett.5b00414.
@article{osti_1391800,
title = {Growth of Au on Pt Icosahedral Nanoparticles Revealed by Low-Dose In Situ TEM},
author = {Wu, Jianbo and Gao, Wenpei and Wen, Jianguo and Miller, Dean J. and Lu, Ping and Zuo, Jian-Min and Yang, Hong},
abstractNote = {A growth mode was revealed by an in situ TEM study of nucleation and growth of Au on Pt icosahedral nanoparticles. Quantitative analysis of growth kinetics was carried out based on real- time TEM data, which show the process involves: 1) deposition of Au on corner sites of Pt icosahedral nanoparticles, 2) diffusion of Au from corners to terraces and edges, and 3) subsequent layer-by-layer growth of Au on Au surfaces to form Pt@Au core-shell nanoparticles. The in situ TEM results indicate diffusion of Au from corner islands to terraces and edges is a kinetically controlled growth, as evidenced by a measurement of diffusion coefficients for these growth processes. We demonstrated that in situ electron microscopy is a valuable tool for quantitative study of nucleation and growth kinetics and can provide new insight into the design and precise control of heterogeneous nanostructures.},
doi = {10.1021/acs.nanolett.5b00414},
url = {https://www.osti.gov/biblio/1391800}, journal = {Nano Letters},
issn = {1530-6984},
number = 4,
volume = 15,
place = {United States},
year = {2015},
month = {3}
}