Surface-enhanced Raman scattering of sulfate ion based on Ag/Si nanostructure

doi:10.1007/s12200-011-0171-8

Front Optoelec Chin

2011, Vol. 4

Issue (4) : 378-381 https://doi.org/10.1007/s12200-011-0171-8

RESEARCH ARTICLE

Surface-enhanced Raman scattering of sulfate ion based on Ag/Si nanostructure

Yueyin SHAO¹(

), Yongqian WEI¹, Zhenghua WANG²

1. Laboratory Material Supply Centre, Soochow University, Suzhou 215123, China; 2. Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China

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Abstract

Silicon nanowires (SiNWs) with tens of micrometer in length have been synthesized and modified with Ag nanoparticles, which were confirmed by X-ray diffractometer (XRD), scanning electron microscopy and transmission electron microscopy. The Ag/Si nanostructure was employed to detect inorganic ions SO42- via surface-enhanced Raman scattering (SERS) with strong signals at low concentrations of 1×10^-9 mol/L. This ultrasensitive method might be applied in other fields.

Keywords surface-enhanced Raman scattering (SERS) silicon nanowires (SiNWs) Ag nanoparticles sulfate ions

Corresponding Author(s): SHAO Yueyin,Email:yyshao@suda.edu.cn

Issue Date: 05 December 2011

Cite this article:

Yueyin SHAO,Yongqian WEI,Zhenghua WANG. Surface-enhanced Raman scattering of sulfate ion based on Ag/Si nanostructure[J]. Front Optoelec Chin, 2011, 4(4): 378-381.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-011-0171-8
https://academic.hep.com.cn/foe/EN/Y2011/V4/I4/378

Fig.1 XRD patterns of as-prepared products (a) and (b) products treated with HF and AgNO solutions successively

Fig.2 (a) SEM image shows as-prepared SiNWs in larger scale; (b) TEM image of a single Ag-modified SiNW with the average diameter of 30 nm; (c) HRTEM image showing Si (111) and Ag (111) crystal planes

Fig.3 SERS spectra of sodium sulfate solution (25 μL) using Ag-modified SiNWs as substrate at concentration of 1.0 × 10 and 1.0 × 10 mol/L, respectively

Fig.4 Solid surface reflectance spectra of (a) SiNWs and (b) Ag-modified SiNWs

Fig.5 HRTEM reveals Ag nanoparticle epitaxially grown on SiNW (marked with an arrow)

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