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Citation: CAO Feng-Juan, CHENG Xiao-Wei, WU Lie, JIANG Xiu-E. In-situ Synthesis of Ag Nano-mountain Enhancing Substrate and Its Application in Surface-Enhanced Infrared Spectroscopy Sensing[J]. Chinese Journal of Analytical Chemistry, ;2019, 47(8): 1205-1211. doi: 10.19756/j.issn.0253-3820.191177 shu

In-situ Synthesis of Ag Nano-mountain Enhancing Substrate and Its Application in Surface-Enhanced Infrared Spectroscopy Sensing

CAO Feng-Juan ^1,2, ,
CHENG Xiao-Wei ^1,3 ,
WU Lie ¹ ,
JIANG Xiu-E ^1,2,3

1.
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China;
3.
Department of Chemistry, University of Science and Technology of China, Hefei 230026, China

Received Date: 2 April 2019
Revised Date: 27 April 2019

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 21675149, 21705146, 21877107, 21874125).

Attenuated total reflection surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) has attracted more and more attention in many fields due to its unique advantages. However, the lack of simple-preparation, low-cost and high-sensitivity enhancing substrates limits the further development and wider application of surface-enhanced infrared spectroscopy technology. In this study, a mountain-like silver nanostructure was prepared by chemical deposition of silver nanoparticles followed by a simple ligand inducing. Theoretical electromagnetic field simulation by finite difference time domain (FDTD) revealed that as-prepared nanostructure could effectively couple with infrared photon and produce a strong local electromagnetic field, showing great potential of serving as enhancing substrate in infrared spectroscopy. SEIRAS results showed that the enhancement factor of as-prepared substrate to the model molecule (p-aminothiophenol) was higher than that of the traditional widely used gold nano-island film, and could be used to in situ quantitatively analyze bovine serum albumin in solution in the range of 5×10^-10 mol/L-4×10^-7 mol/L, showing great potential in infrared sensor.
- Surface-enhanced infrared absorption spectroscopy,
- Enhancing substrate,
- Ag nano-mountain,
- p-Aminothiophenol,
- Bovine serum albumin
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