3D hierarchical Ag nanostructures formed on poly(acrylic acid) brushes grafted graphene oxide as promising SERS substrates

被引:8
作者
Xing, Guoke [1 ]
Wang, Ke [1 ]
Li, Ping [1 ]
Wang, Wenqin [1 ]
Chen, Tao [2 ]
机构
[1] Ningbo Univ, Fac Mat Sci & Chem Engn, Dept Polymer Sci & Engn, Ningbo 315211, Zhejiang, Peoples R China
[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Div Polymer & Composite Mat, Ningbo 315201, Zhejiang, Peoples R China
关键词
graphene oxide; polymer brushes; flowerlike Ag; SERS; ENHANCED RAMAN-SPECTROSCOPY; POLYMER THIN-FILM; GOLD NANOPARTICLES; SURFACE; SCATTERING; AU; SUPERSTRUCTURES; FABRICATION;
D O I
10.1088/1361-6528/aaa813
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In this study, in situ generation of Ag nanostructures with various morphology on poly(acrylic acid) (PAA) brushes grafted onto graphene oxide (GO), for use as substrates for surface-enhanced Raman scattering (SERS), is demonstrated. The overall synthetic strategy involves the loading of Ag precursor ions ((Ag+ and [Ag(NH3)(2)](+)) onto PAA brush-grafted GO, followed by their in situ reduction to Ag nanostructures of various morphology using a reducing agent (NaBH4 or ascorbic acid). Novel 3D hierarchical flowerlike Ag nanostructures were obtained by using AgNO3 as precursor and ascorbic acid as reducing agent. Using 4-aminothiophenol as probe molecules, the as-prepared hierarchical Ag nanostructures exhibited excellent SERS performance, providing enhancement factors of similar to 10(7).
引用
收藏
页数:9
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