SERS properties of gold core silver shell nanoparticles self-assembled on silica substrates and optical fiber endface

Qianqian Geng; Zhenyi Chen; Na Chen; Shupeng Liu; Chen Qian; Tingyun Wang

doi:10.1117/12.975645

7 November 2012 SERS properties of gold core silver shell nanoparticles self-assembled on silica substrates and optical fiber endface

Qianqian Geng, Zhenyi Chen, Na Chen, Shupeng Liu, Chen Qian, Tingyun Wang

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Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84216N (2012) https://doi.org/10.1117/12.975645
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

Gold core silver shell nanoparticles with different molar ratios of gold and silver were prepared by chemical reduction with microwave heating method. Uv-vis absorption spectrometer and transmission electron microscope (TEM) were used to detect their absorption and surface topography. The results show that core-shell nanoparticles had controllable size and uniform distribution. With Rhodamine 6G (R6G) as detection molecules, gold core silver shell sol with a molar ratio of 1:10 had the best surface-enhanced Raman scattering (SERS) effect. And we detected 10^-17 mol/l and 10^-9mol/l R6G solution respectively after they were self-assembled on silica substrates and optical fiber endface.

Citation Download Citation

Qianqian Geng, Zhenyi Chen, Na Chen, Shupeng Liu, Chen Qian, and Tingyun Wang "SERS properties of gold core silver shell nanoparticles self-assembled on silica substrates and optical fiber endface", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84216N (7 November 2012); https://doi.org/10.1117/12.975645

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KEYWORDS

Gold

Silver

Nanoparticles

Raman spectroscopy

Surface enhanced Raman spectroscopy

Absorption

Silica

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