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Synthesis of flexible free-standing silver nanoparticles-graphene films and their surface-enhanced Raman scattering activity

  • Nan Zhao
  • Xiaonong Cheng
  • Yazhou Zhou
  • Mingxin Yang
  • Juan Yang
  • Tao Zhong
  • Sihui Zheng
Research Paper

Abstract

A free-standing and flexible silver nanoparticles-graphene (Ag NPs–GE) film with high surface-enhanced Raman scattering (SERS) sensitivity has been developed. First, the high stable and dispersive Ag NPs–GE composite was fabricated by in situ reduction using graphene oxide sheets as substrates and the hydrazine hydrate as a reducing agent in the solvothermal environment. Second, the Ag NPs–GE films can be fabricated through vacuum filtration of the Ag NPs–GE suspension. Transmission electron microscope (TEM) images show that the Ag NPs with an average size of 22 nm and a narrow particle size distribution are uniformly distributed on GE sheets. The coverage density of Ag NPs onto the surface of GE sheets can be successfully controlled by tuning the concentration of silver ion precursor. As-prepared Ag NPs–GE substrates have good SERS sensitivity due to the high SERS-active of Ag NPs. The enhancement factor for 1 × 10−6 M of rhodamine 6G molecules adsorbed onto the surface of substrate is about 2.7 × 105. The SERS activity toward crystal violet and Escherichia coli was also investigated.

Keywords

Graphene Silver nanoparticles Surface-enhanced Raman scattering Rhodamine 6G Two-dimensional materials 

Notes

Acknowledgments

This work was supported by the National Science Foundation of China (50902061, 51302113), Six Personnel Peak Project (2009137) of Jiangsu Province, Scientific and Technical Innovation Project for Graduate Students (CXZZ12_0670, CXZZ13_0664) and Undergraduate Students of Jiangsu Province (201313986004Y). Excellent Ph.D training program in Jiangsu University (1141220014). Students research project in Jiangsu University (12A299). Supported by the Opening Project of Key Laboratory of Soft Chemistry and Functional Materials (Nanjing University of Science and Technology), Ministry of Education, China.

Supplementary material

11051_2014_2335_MOESM1_ESM.doc (2.8 mb)
Supplementary material 1 (DOC 2844 kb)

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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Nan Zhao
    • 1
  • Xiaonong Cheng
    • 1
  • Yazhou Zhou
    • 1
  • Mingxin Yang
    • 2
  • Juan Yang
    • 1
    • 3
  • Tao Zhong
    • 1
  • Sihui Zheng
    • 1
  1. 1.School of Materials Science and EngineeringJiangsu UniversityZhenjiangPeople’s Republic of China
  2. 2.Jingjiang College of Jiangsu UniversityZhenjiangPeople’s Republic of China
  3. 3.Key Laboratory of Soft Chemistry and Functional MaterialsNanjing University of Science and Technology, Ministry of EducationNanjingPeople’s Republic of China

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