High-performance surface-enhanced Raman scattering sensors based on Ag nanoparticles-coated Si nanowire arrays for quantitative detection of pesticides

被引：130

作者：

Wang, X. T. ^{[1
,2
]}

Shi, W. S. ^{[1
]}

She, G. W. ^{[1
]}

Mu, L. X. ^{[1
]}

Lee, S. T. ^{[1
,3
,4
]}

机构：

[1] Chinese Acad Sci, Key Lab Photochem Convers & Optoelect Mat, Tech Inst Phys & Chem, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

[3] City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Hong Kong, Peoples R China

[4] City Univ Hong Kong, COSDAF, Hong Kong, Hong Kong, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 05期

关键词：

elemental semiconductors; nanosensors; nanowires; organic compounds; semiconductor quantum wires; silicon; silver; surface enhanced Raman scattering; SILVER; SPECTROSCOPY; SILICON; MOLECULES; ZEOLITE; FILMS;

D O I：

10.1063/1.3300837

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A surface-enhanced Raman scattering (SERS) sensor made of Ag nanoparticles-coated Si nanowire (SiNW) arrays was fabricated for the quantitative detection of Carbaryl (an important nitrogen pesticide). H-terminated SiNWs were capable of reducing silver ions, leading to uniform deposition of silver nanoparticles on SiNW arrays. Such wire arrays exhibited a superior detection sensitivity of 10(-17) M Rodamine 6G with high reproducibility. The sensor also enabled high sensitivity, reproducibility, and stability detection of Carbaryl. Significantly, the linear relation between the logarithmic concentrations and Raman peak intensities provided quantitative detection of Carbaryl.

引用

页数：3

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