An effective surface-enhanced Raman scattering template based on gold nanoparticle/silicon nanowire arrays

A large-scale Si nanowire array （SiNWA） is fabricated with gold （Au） nanoparticles by simple metal-assisted chemical etching and metal reduction processes. The three-dimensional nanostructured Au/SiNWA is evaluated as an active substrate for surface-enhanced Raman scattering （SERS）. The results show...

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Bibliographic Details
Published in:Chinese physics B 2014-06, Vol.23 (6), p.547-553
Main Author: 王明利 张常兴 吴正龙 井西利 许海军
Format: Article
Language:English
Subjects:
Arrays
Calibration
Gold
Nanostructure
Nanowires
Raman scattering
Rhodamine 6G
SERS活性
Silicon
Standard deviation
微量有机污染物
模板
相对标准偏差
硅纳米线阵列
若丹明6G
表面增强拉曼散射
金纳米粒子
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Summary:A large-scale Si nanowire array （SiNWA） is fabricated with gold （Au） nanoparticles by simple metal-assisted chemical etching and metal reduction processes. The three-dimensional nanostructured Au/SiNWA is evaluated as an active substrate for surface-enhanced Raman scattering （SERS）. The results show that the detection limit for rhodamine 6G is as low as 10-7 M, and the Raman enhancement factor is as large as 105 with a relative standard deviation of less than 25%. After the calibration of the Raman peak intensifies of rhodamine 6G and thiram, organic molecules could be quantitatively detected. These results indicate that Au/SiNWA is a promising SERS-active substrate for the detection of biomolecules present in low concentrations. Our findings are an important advance in SERS substrates to allow fast and quantitative detection of trace organic contaminants.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/23/6/067802