Polarization Dependence of Surface-enhanced Raman Spectroscopy on Single Fe2O3@Au Particle

Chem. J. Chinese Universities

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Polarization Dependence of Surface-enhanced Raman Spectroscopy on Single Fe₂O₃@Au Particle

SHEN Hong-Xia^1,2, YAO Jian-Lin^1*, ZOU Wen-Jun¹, GU Ren-Ao^1*

1. Department of Chemistry, Suzhou University, Suzhou 215123, China;
2. Department of Biology and Chemical Engineering, Jiaxing College, Jiaxing 314001, China

Received:2008-10-06 Revised:1900-01-01 Online:2009-03-10 Published:2009-03-10
Contact: YAO Jian-Lin, GU Ren-Ao

Abstract

Abstract: The core-shell Fe₂O₃@Au particle with spindle morphology were synthesized by three steps. The mean size of the core-shell paricles was about 500 nm by 85 nm. The final single separated spindle particles were attached onto Si substrates. The thiophenol(TP) was served as probe molecule to investigate the pola-rized dependent surface-enhanced Raman scattering(SERS) from single particle. Dramatic variations in SERS intensity was observed when the single core-shell particle was oriented at different angles relative to the polarization of excitation laser. The maximum SERS intensity was detected for TP absorbed on the anisotropic particle which was in the polarization direction parallel to the long axis of the particle, while the minimum intensity was detected at the direction of the incident field that is perpendicular to the long axis of the particle. Our preliminary results provided useful way for obtaining deeper insight to the SERS mechanism.

Key words: Polarization dependence, Surface enhanced Raman spectroscopy, Fe2O3@Au particle

CLC Number:

O647.11

TrendMD:

SHEN Hong-Xia^1,2, YAO Jian-Lin^1*, ZOU Wen-Jun¹, GU Ren-Ao^1*. Polarization Dependence of Surface-enhanced Raman Spectroscopy on Single Fe₂O₃@Au Particle[J]. Chem. J. Chinese Universities, doi: .

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Polarization Dependence of Surface-enhanced Raman Spectroscopy on Single Fe₂O₃@Au Particle

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