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3D Bragg coherent diffractive imaging of five-fold multiply twinned gold nanoparticle

Journal Article · · Nanoscale
DOI:https://doi.org/10.1039/C7NR05028C· OSTI ID:1393173
 [1];  [2];  [3];  [4];  [5];  [6]
  1. Univ. of California, San Diego, CA (United States). Dept. of Physics; Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source
  2. Univ. of California, San Diego, CA (United States). Dept. of Physics; Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  3. Center for Magnetic Recording Research; University of California-San Diego; La Jolla; USA
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source
  5. Univ. of California, San Diego, CA (United States). Center for Magnetic Recording Research
  6. Univ. of California, San Diego, CA (United States). Dept. of Physics

The formation mechanism of five-fold multiply twinned nanoparticles has been a long-term topic because of their geometrical incompatibility. So, various models have been proposed to explain how the internal structure of the multiply twinned nanoparticles accommodates the constraints of the solid-angle deficiency. Here, we investigate the internal structure, strain field and strain energy density of 600 nm sized five-fold multiply twinned gold nanoparticles quantitatively using Bragg coherent diffractive imaging, which is suitable for the study of buried defects and three-dimensional strain distribution with great precision. Our study reveals that the strain energy density in five-fold multiply twinned gold nanoparticles is an order of magnitude higher than that of the single nanocrystals such as an octahedron and triangular plate synthesized under the same conditions. This result indicates that the strain developed while accommodating an angular misfit, although partially released through the introduction of structural defects, is still large throughout the crystal.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357; SC0001805
OSTI ID:
1393173
Journal Information:
Nanoscale, Journal Name: Nanoscale Journal Issue: 35 Vol. 9; ISSN NANOHL; ISSN 2040-3364
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Enormous suppression of phonon transport in silicon nanowires with five-fold twin boundary journal January 2018
Bragg coherent diffractive imaging of ferromagnetic nickel nanoparticles journal May 2018

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