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Issue 15, 2014
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Controllable conversion of plasmonic Cu2−xS nanoparticles to Au2S by cation exchange and electron beam induced transformation of Cu2−xS–Au2S core/shell nanostructures

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Abstract

Self-doped Cu2−xS nanocrystals (NCs) were converted into monodisperse Cu2−xS–Au2S NCs of tunable composition, including pure Au2S, by cation exchange. The near-infrared (NIR) localized surface plasmon resonance (LSPR) was dampened and red-shifted with increasing Au content. Cation exchange was accompanied by elimination of cation vacancies and a change in crystal structure. Partially exchanged Cu2−xS–Au2S core/shell structures evolved to dumbbell-like structures under electron irradiation in the transmission electron microscope (TEM).

Graphical abstract: Controllable conversion of plasmonic Cu2−xS nanoparticles to Au2S by cation exchange and electron beam induced transformation of Cu2−xS–Au2S core/shell nanostructures

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Supplementary files

Article information


Submitted
18 Apr 2014
Accepted
06 Jun 2014
First published
09 Jun 2014

Nanoscale, 2014,6, 8852-8857
Article type
Paper
Author version available

Controllable conversion of plasmonic Cu2−xS nanoparticles to Au2S by cation exchange and electron beam induced transformation of Cu2−xS–Au2S core/shell nanostructures

X. Wang, X. Liu, D. Zhu and M. T. Swihart, Nanoscale, 2014, 6, 8852
DOI: 10.1039/C4NR02114B

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