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Title: Study of the Internal Compositions of Binary Alloy Pd-Rh Nanoparticles by Using Bragg Coherent Diffraction Imaging

Abstract

Bragg coherent diffraction imaging (BCDI), a well-established technique for imaging the internal strain of nanoparticles, was used to image the internal compositional distribution of binary alloys in thermal equilibrium. The images experimentally obtained for Pd-Rh alloy nanoparticles are presented and discussed. A direct correspondence between the lattice strain and the compositional deviation is discussed with the derivation of the BCDI displacement field aided by illustrations. The correspondence suggests that the longitudinal derivative of the displacement field, the strain induced by compositional heterogeneity, can be quantitatively converted to 3D images of the compositional deviation from the particle average by using Vegard’s law. It also suggests that the transverse derivative can be qualitatively associated with the disorder of Bragg planes. The studied Pd-Rh alloy nanoparticle exhibited internal composition heterogeneity; the Rh composition tends to be high at edges and corners between facets and gradually decreases from the surface to the core of the particle.

Authors:
 [1];  [2];  [3];  [3];  [3];  [2]
  1. Argonne National Lab. (ANL), Argonne, IL (United States); Tohoku Univ., Sendai (Japan)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Safarik Univ., Kosice (Slovak Republic)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division; Slovak Research and Development Agency (SRDA); Japan Society for the Promotion of Science (JSPS); European Union (EU)
OSTI Identifier:
1572081
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the Korean Physical Society
Additional Journal Information:
Journal Volume: 75; Journal Issue: 7; Journal ID: ISSN 0374-4884
Publisher:
Korean Physical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BCDI; alloy nanoparticles; coherent x-ray

Citation Formats

Kawaguchi, Tomoya, Cha, Wonsuk, Latyshev, Vitalii, Vorobiov, Serhii, Komanicky, Vladimir, and You, Hoydoo. Study of the Internal Compositions of Binary Alloy Pd-Rh Nanoparticles by Using Bragg Coherent Diffraction Imaging. United States: N. p., 2019. Web. doi:10.3938/jkps.75.528.
Kawaguchi, Tomoya, Cha, Wonsuk, Latyshev, Vitalii, Vorobiov, Serhii, Komanicky, Vladimir, & You, Hoydoo. Study of the Internal Compositions of Binary Alloy Pd-Rh Nanoparticles by Using Bragg Coherent Diffraction Imaging. United States. doi:10.3938/jkps.75.528.
Kawaguchi, Tomoya, Cha, Wonsuk, Latyshev, Vitalii, Vorobiov, Serhii, Komanicky, Vladimir, and You, Hoydoo. Thu . "Study of the Internal Compositions of Binary Alloy Pd-Rh Nanoparticles by Using Bragg Coherent Diffraction Imaging". United States. doi:10.3938/jkps.75.528.
@article{osti_1572081,
title = {Study of the Internal Compositions of Binary Alloy Pd-Rh Nanoparticles by Using Bragg Coherent Diffraction Imaging},
author = {Kawaguchi, Tomoya and Cha, Wonsuk and Latyshev, Vitalii and Vorobiov, Serhii and Komanicky, Vladimir and You, Hoydoo},
abstractNote = {Bragg coherent diffraction imaging (BCDI), a well-established technique for imaging the internal strain of nanoparticles, was used to image the internal compositional distribution of binary alloys in thermal equilibrium. The images experimentally obtained for Pd-Rh alloy nanoparticles are presented and discussed. A direct correspondence between the lattice strain and the compositional deviation is discussed with the derivation of the BCDI displacement field aided by illustrations. The correspondence suggests that the longitudinal derivative of the displacement field, the strain induced by compositional heterogeneity, can be quantitatively converted to 3D images of the compositional deviation from the particle average by using Vegard’s law. It also suggests that the transverse derivative can be qualitatively associated with the disorder of Bragg planes. The studied Pd-Rh alloy nanoparticle exhibited internal composition heterogeneity; the Rh composition tends to be high at edges and corners between facets and gradually decreases from the surface to the core of the particle.},
doi = {10.3938/jkps.75.528},
journal = {Journal of the Korean Physical Society},
number = 7,
volume = 75,
place = {United States},
year = {2019},
month = {10}
}

Journal Article:
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This content will become publicly available on October 10, 2020
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