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Title: Nobler than the Noblest: Noncubic Gold Microcrystallites

Abstract

Conventional gold comprising the cubic lattice is universally known for its stability. However, well known to chemists and metallurgists, this nobility is challenged by reagents such as aqua regia, which dissolve gold to form a salt solution. Among metals, mercury blends with gold to form amalgam, otherwise transition metals such as copper tend to interact with gold surfaces in electrochemical media. Herein, we report a combined experimental and theoretical investigation of the stability of Au microcrystallites bearing unconventional crystal lattices that exhibit enhanced stability towards Hg and aqua regia and practically no interaction with Cu during electroless plating. Undoubtedly, the unconventional gold is nobler.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]
  1. Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bangalore (India). Thematic Unit of Excellence on Nanochemistry, and Chemistry and Physics of Materials Unit
  2. Vanderbilt Univ., Nashville, TN (United States). Dept. of Physics and Astronomy; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  3. Centre for Nano and Soft Matter Sciences, Jalahalli, Bangalore (India)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States); Vanderbilt Univ., Nashville, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1543474
Alternate Identifier(s):
OSTI ID: 1460459; OSTI ID: 1597892
Grant/Contract Number:  
[AC02-05CH11231; FG02-09ER46554]
Resource Type:
Accepted Manuscript
Journal Name:
Angewandte Chemie (International Edition)
Additional Journal Information:
[Journal Name: Angewandte Chemie (International Edition); Journal Volume: 57; Journal Issue: 29]; Journal ID: ISSN 1433-7851
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; chemistry; amalgam; aqua regia; copper; gold

Citation Formats

Mettela, Gangaiah, Kouser, Summayya, Sow, Chaitali, Pantelides, Sokrates T., and Kulkarni, Giridhar U. Nobler than the Noblest: Noncubic Gold Microcrystallites. United States: N. p., 2018. Web. doi:10.1002/anie.201804541.
Mettela, Gangaiah, Kouser, Summayya, Sow, Chaitali, Pantelides, Sokrates T., & Kulkarni, Giridhar U. Nobler than the Noblest: Noncubic Gold Microcrystallites. United States. doi:10.1002/anie.201804541.
Mettela, Gangaiah, Kouser, Summayya, Sow, Chaitali, Pantelides, Sokrates T., and Kulkarni, Giridhar U. Wed . "Nobler than the Noblest: Noncubic Gold Microcrystallites". United States. doi:10.1002/anie.201804541. https://www.osti.gov/servlets/purl/1543474.
@article{osti_1543474,
title = {Nobler than the Noblest: Noncubic Gold Microcrystallites},
author = {Mettela, Gangaiah and Kouser, Summayya and Sow, Chaitali and Pantelides, Sokrates T. and Kulkarni, Giridhar U.},
abstractNote = {Conventional gold comprising the cubic lattice is universally known for its stability. However, well known to chemists and metallurgists, this nobility is challenged by reagents such as aqua regia, which dissolve gold to form a salt solution. Among metals, mercury blends with gold to form amalgam, otherwise transition metals such as copper tend to interact with gold surfaces in electrochemical media. Herein, we report a combined experimental and theoretical investigation of the stability of Au microcrystallites bearing unconventional crystal lattices that exhibit enhanced stability towards Hg and aqua regia and practically no interaction with Cu during electroless plating. Undoubtedly, the unconventional gold is nobler.},
doi = {10.1002/anie.201804541},
journal = {Angewandte Chemie (International Edition)},
number = [29],
volume = [57],
place = {United States},
year = {2018},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: (a, e) SEM images of uncoated typical fcc and bc(o,t) Au bipyramids. SEM images and elemental maps following Cu plating on fcc (b-d) and bc(o,t) Au (f-h) bipyramids, respectively. (i) A high magnification image of the tip region (dashed square) indicated in f. (j and k) EDS intensitymore » profiles of Cu and Au along the length (top) and across the diameter of the crystallite shown in f. A common arbitrary intensity scale has been used. (l) XRD patterns collected from Au microcrystallites before and after Cu plating for 10 minutes.« less

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.