The investigation of a series of n-hydroxybenzoic acids (n=p, m, o) on a new surface enhanced Raman scattering active substrate.
Ag nanoparticles, organized on indium tin oxide (ITO) surface, can act as a new surface enhanced Raman scattering (SERS) active substrate as well as a dry electrode. Compared with the traditional SERS-active substrate, its notable advantage is that the microcosmic changes of the film can be reflected by the SERS spectrum during the investigation of the film's electrical and other macroscopic characteristics. To illuminate the above-mentioned property of this new substrate, a series of n-hydroxybenzoic acids (n-HBA; n=p, m and o) was tested as probe molecules by SERS technique. These SERS spectra indicate that the significant changes of frequencies as well as intensities, respectively, arise from the changes of the adsorption behavior along with the proportional variation of molecules and silver nanoparticles. Excellent SERS signals prove that the silver nanoparticles-coated ITO is a highly SERS-active substrate and can efficiently reflect the microcosmic property of the film, which suggest it has promising potential of being a new technique for further application in the field of thin-film research.
Wang
Li-Ran
LR
Beijing Key Lab of Nano-Photonics and Nano-Structure (NPNS), Department of Physics, Capital Normal University, Beijing 100037 PR China. liran_9921@163.com
Fang
Yan
Y
D003102:Colloids / Q000737:chemistry; D062385:Hydroxybenzoates / Q000737:chemistry*; D012542:Scattering, Radiation; D012834:Silver; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman / Q000379:methods*; D017971:Tin Compounds / Q000737:chemistry
D003102:Colloids; D062385:Hydroxybenzoates; D017971:Tin Compounds; D012834:Silver; C109984:indium tin oxide