Issue 40, 2019

Electrochemical synthesis of Au@semiconductor core–shell nanocrystals guided by single particle plasmonic imaging

Abstract

Plasmonic photocatalysts have opened up a new direction in utilization of visible light and promoting photocatalytic efficiency. An electrochemical deposition method is reported to synthesise metal@semiconductor (M@SC) core–shell nanocrystals. Due to the strong affinity of Au atoms to S2− and Se2− reduced at negative potential, CdS, CdSe and ZnS were selectively deposited on the surface of the Au core to form a uniform shell with a clear metal/semiconductor interface, which conquered the barrier caused by the large lattice mismatch between the two components. Plasmonic effects increased the photocatalytic performance, as well as provided a chance to in situ monitor the surface nucleation and growth. The structure formation process could be observed under dark-field microscopy (DFM) in real-time and precisely controlled via the scattering color, intensity and wavelength. The proof-of-concept strategy combines the electrochemical deposition and plasmonic imaging, which provides a universal approach in controllable synthesis of core–shell heterostructures, and leads to the improvement of plasmonic photocatalysts.

Graphical abstract: Electrochemical synthesis of Au@semiconductor core–shell nanocrystals guided by single particle plasmonic imaging

Supplementary files

Article information

Article type
Edge Article
Submitted
10 Jun 2019
Accepted
12 Aug 2019
First published
13 Aug 2019
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2019,10, 9308-9314

Electrochemical synthesis of Au@semiconductor core–shell nanocrystals guided by single particle plasmonic imaging

H. Wang, W. Zhao, C. Xu, H. Chen and J. Xu, Chem. Sci., 2019, 10, 9308 DOI: 10.1039/C9SC02804H

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