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Title: Evolution of dealloying induced strain in nanoporous gold crystals

Abstract

For this paper, we studied the evolution of dealloying-induced strain along the {111} in a Ag-Au nano-crystal in situ, during formation of nanoporous gold at the initial stage of dealloying using Bragg coherent x-ray diffractive imaging. The maximum strain magnitude in the crystal doubled in 10 s of dealloying. Although formation of nano-pores just began at the surface, the greatest strain is located 60-80 nm deep within the crystal. Dealloying induced a compressive strain in this region, indicating volume shrinkage occurred during pore formation. The crystal interior showed a small tensile strain, which can be explained by 'pulling' of the dealloyed region by the non-dealloyed region during volume reduction. A surface strain relaxation developed, attributed to atomic rearrangement during dealloying. This clearer understanding of the role of strain in the initial stages of formation of nanoporous gold by dealloying can be exploited for development of new sensors, battery electrodes, and materials for catalysis.

Authors:
ORCiD logo [1];  [2];  [3];  [4]
  1. Stony Brook Univ., NY (United States). Dept. of Materials Science and Chemical Engineering; Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  3. Northwestern Univ., Evanston, IL (United States). Center for Nanoscale Materials
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
OSTI Identifier:
1425007
Report Number(s):
BNL-114485-2017-JAAM
Journal ID: ISSN 2040-3364; NANOHL; TRN: US1801997
Grant/Contract Number:  
SC0012704; AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nanoscale
Additional Journal Information:
Journal Volume: 9; Journal Issue: 17; Journal ID: ISSN 2040-3364
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Chen-Wiegart, Yu-chen Karen, Harder, Ross, Dunand, David C., and McNulty, Ian. Evolution of dealloying induced strain in nanoporous gold crystals. United States: N. p., 2017. Web. doi:10.1039/C6NR09635B.
Chen-Wiegart, Yu-chen Karen, Harder, Ross, Dunand, David C., & McNulty, Ian. Evolution of dealloying induced strain in nanoporous gold crystals. United States. doi:10.1039/C6NR09635B.
Chen-Wiegart, Yu-chen Karen, Harder, Ross, Dunand, David C., and McNulty, Ian. Mon . "Evolution of dealloying induced strain in nanoporous gold crystals". United States. doi:10.1039/C6NR09635B. https://www.osti.gov/servlets/purl/1425007.
@article{osti_1425007,
title = {Evolution of dealloying induced strain in nanoporous gold crystals},
author = {Chen-Wiegart, Yu-chen Karen and Harder, Ross and Dunand, David C. and McNulty, Ian},
abstractNote = {For this paper, we studied the evolution of dealloying-induced strain along the {111} in a Ag-Au nano-crystal in situ, during formation of nanoporous gold at the initial stage of dealloying using Bragg coherent x-ray diffractive imaging. The maximum strain magnitude in the crystal doubled in 10 s of dealloying. Although formation of nano-pores just began at the surface, the greatest strain is located 60-80 nm deep within the crystal. Dealloying induced a compressive strain in this region, indicating volume shrinkage occurred during pore formation. The crystal interior showed a small tensile strain, which can be explained by 'pulling' of the dealloyed region by the non-dealloyed region during volume reduction. A surface strain relaxation developed, attributed to atomic rearrangement during dealloying. This clearer understanding of the role of strain in the initial stages of formation of nanoporous gold by dealloying can be exploited for development of new sensors, battery electrodes, and materials for catalysis.},
doi = {10.1039/C6NR09635B},
journal = {Nanoscale},
issn = {2040-3364},
number = 17,
volume = 9,
place = {United States},
year = {2017},
month = {4}
}

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Free Publicly Available Full Text
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Cited by: 8 works
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    Works referencing / citing this record:

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