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Title: The surface structure of silver-coated gold nanocrystals and its influence on shape control

Abstract

Understanding the surface structure of metal nanocrystals with specific facet indices is important due to its impact on controlling nanocrystal shape and functionality. However, this is particularly challenging for halide-adsorbed nanocrystals due to the difficulty in analysing interactions between metals and light halides (for example, chloride). Here we uncover the surface structures of chloride-adsorbed, silver-coated gold nanocrystals with {111}, {110}, {310} and {720} indexed facets by X-ray absorption spectroscopy and density functional theory modelling. The silver–chloride, silver–silver and silver–gold bonding structures are markedly different between the nanocrystal surfaces, and are sensitive to their formation mechanism and facet type. A unique approach of combining the density functional theory and experimental/simulated X-ray spectroscopy further verifies the surface structure models and identifies the previously indistinguishable valence state of silver atoms on the nanocrystal surfaces. Overall, this work elucidates the thus-far unknown chloride–metal nanocrystal surface structures and sheds light onto the halide-induced growth mechanism of anisotropic nanocrystals.

Authors:
 [1];  [2];  [3];  [1];  [3];  [2];  [1]
  1. Dalhousie Univ. Halifax, Nova Scotia (Canada)
  2. Northwestern Univ., Evanston, IL (United States)
  3. Univ. of California, Riverside, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1214785
Grant/Contract Number:  
AC02-05CH11231; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE

Citation Formats

Padmos, J. Daniel, Personick, Michelle L., Tang, Qing, Duchesne, Paul N., Jiang, De-en, Mirkin, Chad A., and Zhang, Peng. The surface structure of silver-coated gold nanocrystals and its influence on shape control. United States: N. p., 2015. Web. doi:10.1038/ncomms8664.
Padmos, J. Daniel, Personick, Michelle L., Tang, Qing, Duchesne, Paul N., Jiang, De-en, Mirkin, Chad A., & Zhang, Peng. The surface structure of silver-coated gold nanocrystals and its influence on shape control. United States. doi:10.1038/ncomms8664.
Padmos, J. Daniel, Personick, Michelle L., Tang, Qing, Duchesne, Paul N., Jiang, De-en, Mirkin, Chad A., and Zhang, Peng. Wed . "The surface structure of silver-coated gold nanocrystals and its influence on shape control". United States. doi:10.1038/ncomms8664. https://www.osti.gov/servlets/purl/1214785.
@article{osti_1214785,
title = {The surface structure of silver-coated gold nanocrystals and its influence on shape control},
author = {Padmos, J. Daniel and Personick, Michelle L. and Tang, Qing and Duchesne, Paul N. and Jiang, De-en and Mirkin, Chad A. and Zhang, Peng},
abstractNote = {Understanding the surface structure of metal nanocrystals with specific facet indices is important due to its impact on controlling nanocrystal shape and functionality. However, this is particularly challenging for halide-adsorbed nanocrystals due to the difficulty in analysing interactions between metals and light halides (for example, chloride). Here we uncover the surface structures of chloride-adsorbed, silver-coated gold nanocrystals with {111}, {110}, {310} and {720} indexed facets by X-ray absorption spectroscopy and density functional theory modelling. The silver–chloride, silver–silver and silver–gold bonding structures are markedly different between the nanocrystal surfaces, and are sensitive to their formation mechanism and facet type. A unique approach of combining the density functional theory and experimental/simulated X-ray spectroscopy further verifies the surface structure models and identifies the previously indistinguishable valence state of silver atoms on the nanocrystal surfaces. Overall, this work elucidates the thus-far unknown chloride–metal nanocrystal surface structures and sheds light onto the halide-induced growth mechanism of anisotropic nanocrystals.},
doi = {10.1038/ncomms8664},
journal = {Nature Communications},
number = ,
volume = 6,
place = {United States},
year = {2015},
month = {7}
}

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Cited by: 17 works
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