Preparation of silicon surface pyramid arrays and modification of thin gold film for surface-enhanced Raman scattering

2018 5th International Conference on Advanced Composite Materials and Manufacturing Engineering

Gu, Ciyong^1 ; Man, Shiqing^1 ; Tang, Junqi^1 ; Ye, Qiaoyun^1 ; Yu, Zhibin^1

Yunnan Key Laboratory for Optoelectronic Information Technology, School of Physics and Electronic Information, Yunnan Normal University, Kunming

650500, China^1

关键词: Crystalline silicon surfaces;    Detection of chemicals;    Enhancement effects;    Raman characteristics;    Raman enhancement;    Silicon surface microstructure;    Silicon surfaces;    Surface enhanced Raman Scattering (SERS);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/394/2/022049/pdf
DOI  :  10.1088/1757-899X/394/2/022049

来源: IOP

【 摘 要 】

Mon crystalline silicon surface microstructure is prepared by 15wt% K3PO4 and 3wt% K2SiO3 solutions at 90 °C for 42 min. The monocrystalline silicon surface microstructure obtained high coverage, uniformity and low reflectivity. The surface-enhanced Raman scattering (SERS) substrate based on silicon nanoporous pyramid arrays/gold film (Si/Au) is prepared by ion sputtering. Methylene blue (1 × 10-5 mol/L) is used as a probe molecule, and the enhancement effect of Si/Au SERS substrate is investigated. The results show that silicon surface pyramid arrays have high Raman enhancement effect when deposition time is 5min. Furthermore, the applied of the Si/Au SERS substrate in Raman detection of melamine (1 × 10-3 mol/L), the Raman characteristic peaks of melamine is enhanced obviously. These results indicated that the Si/Au SERS substrate had potential application value in food safety and the detection of chemical dyes and contraband.