| An effective surface-enhanced Raman scattering template based on gold nanoparticle/silicon nanowire arrays |
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| 作者姓名： | 王明利 张常兴 吴正龙 井西利 许海军 |
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| 基金项目： | supported by the National Natural Science Foundation of China(Grant No.11104008);the Beijing Natural Science Foundation,China(Grant No.4142040);the Doctoral Fund of the Ministry of Education of China(Grant No.20090010120014);the Beijing Higher Education Young Elite Teacher Project;the Technology Research and Development Program of Qinhuangdao City,China(Grant Nos.201001A034 and 2012021A056) |
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| 摘 要： | 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.
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| 关 键 词： | 表面增强拉曼散射 硅纳米线阵列 金纳米粒子 SERS活性 微量有机污染物 若丹明6G 模板 相对标准偏差 |
An effective surface-enhanced Raman scattering template based on gold nanoparticle/silicon nanowire arrays |
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| Abstract: | 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 as10-7M, and the Raman enhancement factor is as large as 105with a relative standard deviation of less than 25%. After the calibration of the Raman peak intensities 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. |
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| Keywords: | surface-enhanced Raman scattering nanowire array quantitative detection |
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