Acta Phys. -Chim. Sin. ›› 2017, Vol. 33 ›› Issue (2): 435-440.doi: 10.3866/PKU.WHXB201611101

• ARTICLE • Previous Articles    

Characterization and Application of Au Nanoparticle/Agarose Composite Film Fabricated by Room Temperature Electron Reduction

Min FANG,Zong-Yuan WANG,Chang-Jun LIU*()   

  • Received:2016-09-05 Published:2017-01-12
  • Contact: Chang-Jun LIU E-mail:coronacj@tju.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21476157)

Abstract:

An Au nanoparticle/agarose composite film was fabricated using room temperature electron reduction with argon glow discharge as a cheap electron source. The synthetic procedure was facile, easy, and green. Characterization by UV-Vis spectrophotometry (UV-Vis), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) revealed that the distribution of Au nanoparticles in the composite film could be tuned by varying the concentration of HAuCl4, while the shape of Au nanoparticles could be controlled by adding polyvinyl pyrrolidone (PVP). The Au nanoparticles were closely packed in the composite film, making an excellent surface enhanced Raman scattering (SERS)-active substrate. A SERS enhanced factor (EF) of over 106 and detection limit as low as 10-12 mol·L-1 were obtained for SERS detection using 4-aminothiophenol (4-ATP) as the probe. Moreover, the composite film possessed good uniformity and stability as a SERS substrate.

Key words: Electron reduction, Composite film, Au, SERS

MSC2000: 

  • O649