Issue 101, 2016, Issue in Progress

Polyhedron Cu2O@Ag composite microstructures: synthesis, mechanism analysis and structure-dependent SERS properties

Abstract

Composite microstructures consisting of Cu2O polyhedrons and Ag nanoparticles (Cu2O@Ag CMs) were successfully prepared through a modified reduction method. In the synthesis process of the Cu2O crystals, by modulating the concentrations of surfactant poly(vinyl pyrrolidone), the as-prepared Cu2O polyhedrons with diverse morphologies displayed a unique shape evolution which clearly revealed their growth mechanism. By in situ adding AgNO3 into the Cu2O solution, Cu2O@Ag CMs were synthesized and their surface-enhanced Raman scattering (SERS) performances were evaluated with the help of labeling with 4-mercaptobenzoic acid molecules. The experimental and simulated results shown that the Cu2O@Ag CMs exhibit structure-dependent SERS characteristics, i.e., their SERS enhancements closely relied on the morphologies of the Cu2O polyhedrons, and the sizes and distributions of the Ag nanoparticles. Especially, under the optimized synthesis conditions, the as-prepared concave trisoctahedron Cu2O@Ag CMs have a superior SERS activity with an enhancement factor of 3.21 × 106. This shows that the synthesized Cu2O@Ag CMs could have potential applications in chemical and biological fields.

Graphical abstract: Polyhedron Cu2O@Ag composite microstructures: synthesis, mechanism analysis and structure-dependent SERS properties

Article information

Article type
Paper
Submitted
19 Aug 2016
Accepted
07 Oct 2016
First published
07 Oct 2016

RSC Adv., 2016,6, 99105-99113

Polyhedron Cu2O@Ag composite microstructures: synthesis, mechanism analysis and structure-dependent SERS properties

H. Luo, J. Zhou, H. Zhong, L. Zhou, Z. Jia and X. Tan, RSC Adv., 2016, 6, 99105 DOI: 10.1039/C6RA20856H

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