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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 the photocatalytic efficiency. An electrochemical deposition method is reported to synthesis 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 Au core to form uniform shell with clear metal/semiconductor interface, which conquered the barrier caused by 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 heterostructure, and leads to the improvement of plasmonic photocatalysts.

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Publication details

The article was received on 10 Jun 2019, accepted on 12 Aug 2019 and first published on 13 Aug 2019


Article type: Edge Article
DOI: 10.1039/C9SC02804H
Chem. Sci., 2019, Accepted Manuscript
  • Open access: Creative Commons BY-NC license
    All publication charges for this article have been paid for by the Royal Society of Chemistry

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    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, Accepted Manuscript , DOI: 10.1039/C9SC02804H

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