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Seed-Mediated Growth of Gold Nanocrystals: Changes to the Crystallinity or Morphology as Induced by the Treatment of Seeds with a Sulfur Species

Journal Article · · Journal of Physical Chemistry. B
DOI:https://doi.org/10.1021/jp506328p· OSTI ID:1201341
 [1];  [2];  [3];  [4];  [5];  [3];  [6]
  1. Georgia Inst. of Technology, Atlanta, GA (United States). School of Chemistry and Biochemistry
  2. Georgia Inst. of Technology, Atlanta, GA (United States) Wallace H. Coulter Dept. of Biomedical Engineering; Emory Univ., Atlanta, GA (United States); Wuhan Univ. (China). College of Chemistry and Molecular Sciences. State Key Lab. of Analytical Chemistry for Biology and Medicine
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  4. Georgia Inst. of Technology, Atlanta, GA (United States). School of Chemistry and Biochemistry
  5. Georgia Inst. of Technology, Atlanta, GA (United States) Wallace H. Coulter Dept. of Biomedical Engineering; Emory Univ., Atlanta, GA (United States)
  6. Georgia Inst. of Technology, Atlanta, GA (United States). School of Chemistry and Biochemistry and Wallace H. Coulter Dept. of Biomedical Engineering; Emory Univ., Atlanta, GA (United States)
We report our observation of changes to the crystallinity or morphology during seed-mediated growth of Au nanocrystals. When single-crystal Au seeds with a spherical or rod-like shape were treated with a chemical species such as S₂O₃²⁻ ions, twin defects were developed during the growth process to generate multiply twinned nanostructures. X-ray photoelectron spectroscopy analysis indicated that the S₂O₃²⁻ ions were chemisorbed on the surfaces of the seeds during the treatment. The chemisorbed S₂O₃²⁻ ions somehow influenced the crystallization of Au atoms added onto the surface during a growth process, leading to the formation of twin defects. In contrast to the spherical and rod-like Au seeds, the single-crystal structure was retained to generate a concave morphology when single-crystal Au seeds with a cubic or octahedral shape were used for a similar treatment and then seed-mediated growth. The different outcomes are likely related to the difference in spatial distribution of S₂O₃²⁻ ions chemisorbed on the surface of a seed. This approach based on surface modification is potentially extendable to other noble metals for engineering the crystallinity and morphology of nanocrystals formed via seed-mediated growth.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI ID:
1201341
Report Number(s):
BNL--107873-2015-JA; KC0201010
Journal Information:
Journal of Physical Chemistry. B, Journal Name: Journal of Physical Chemistry. B Journal Issue: 49 Vol. 118; ISSN 1520-6106
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Keimvermitteltes Wachstum kolloidaler Metallnanokristalle journal December 2016
Seed-Mediated Growth of Colloidal Metal Nanocrystals journal December 2016
Building up strain in colloidal metal nanoparticle catalysts journal January 2015

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