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中文摘要：
表面增强拉曼散射（SERS）技术由于其极高的检测灵敏度而在表面科学中具有广泛的用途．近年来，复杂SERS机理的研究日渐成熟，这主要是由于SERS基底的优化和可控制备，如各种形状纳米粒子的制备为SERS增强效应与形状尺寸的关联提供了大量的实验数据．
英文摘要：
The core-shell Fe2O3@ Au panicle 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 polari- zation of excitation laser. The maximum SERS intensity was detected for TP absorbed on the anisotropic parti- cle which was in the polarization direction parallel to the long axis of the panicle, while the minimum intensity was detected at the direction of the incident field that is perpendicular to the long axis of the particle. Our pre- liminary results provided useful way for obtaining deeper insight to the SERS mechanism.
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