Design of Cu2O-Au composite microstructures for surface-enhanced Raman scattering study

被引：35

作者：

Chen, Lei ^{[1
]}

Zhao, Yue ^{[1
]}

Zhang, Yongjun ^{[1
]}

Liu, Maomao ^{[1
]}

Wang, Yaxin ^{[1
]}

Qu, Xin ^{[2
,3
]}

Liu, Yang ^{[1
]}

Li, Ji ^{[1
]}

Liu, Xiaoyan ^{[1
]}

Yang, Jinghai ^{[1
,2
]}

机构：

[1] Jilin Normal Univ, Key Lab Funct Mat Phys & Chem, Minist Educ, Siping 136000, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Changchun 130033, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100039, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2016年 / 507卷

关键词：

Cu2O-Au composite microstructures; Surface-enhanced raman scattering; Localized surface plasmon resonance; Charge transfer; CHARGE-TRANSFER CONTRIBUTION; PHOTOCATALYTIC ACTIVITY; SELECTIVE GROWTH; SOLAR-CELLS; SPECTROSCOPY; OXIDE; SERS; NANOPARTICLES; SILVER; MICROCRYSTALS;

D O I：

10.1016/j.colsurfa.2016.07.053

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Octahedral Cu2O-Au composite microstructures (CMSs) were synthesized with a facile in situ method and were attempted as surface-enhanced Raman scattering (SERS) substrates. The density of the Au nanoparticles (NPs) on the surface of the octahedral Cu2O microcrystals,can be controlled by tuning the concentration of the gold precursor, which can further influence the SERS activity of the Cu2O-Au CMSs system. The CMSs system exhibited a charge transfer from Au to Cu2O. Furthermore, metallic NPs deposited on the semiconductor material formed a local electromagnetic field, which altered the interfacial charge distribution. The SERS signal enhancement from the Cu2O-Au CMSs system is attributed to a combination of electromagnetic and chemical enhancement mechanisms occurring simultaneously at the semiconductor-metal interface. Overall, the proposed CMSs system will provide a new model for SERS study and application. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：96 / 102

页数：7

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