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

Abstract

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 nanoparticle accommodates the constraints of the solid-angle deficiency. We investigate the internal structure, strain field and strain energy density of a 600 nm sized five-fold multiply twinned gold nanoparticle 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 a five-fold multiply twinned gold nanoparticle is an order of magnitude higher than the single nanocrystals such as an octahedron and triangular plate synthesized under the same conditions. This result indicates that the strain developed while accommodating angular misfit, although partially released through the introduction of structural defects, is still large throughout the crystal.

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Publication details

The article was received on 11 Jul 2017, accepted on 10 Aug 2017 and first published on 11 Aug 2017


Article type: Paper
DOI: 10.1039/C7NR05028C
Citation: Nanoscale, 2017, Accepted Manuscript
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    3D Bragg coherent diffractive imaging of five-fold multiply twinned gold nanoparticle

    J. W. Kim, A. Ulvestad, S. Manna, R. Harder, E. E. Fullerton and O. Shpyrko, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR05028C

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