中文摘要：

表面增强拉曼散射（SERS）光谱已广泛应用在生命科学、化学、医学等诸多领域.设计了一种二维有序的半核壳SERS活性基底.利用自组装技术制备聚苯乙烯（PS）球核,通过磁控溅射系统在其表面包覆Ag/Fe/Ag三层壳,改变Fe的溅射时间,制成不同厚度铁磁性层的半核壳PS@Ag/Fe/Ag阵列.采用532 nm激发波长,选择对巯基苯胺作为探针分子研究SERS基底的活性,其增强因子可达到10~7.SERS的增强主要来源于物理增强（即电磁场增强）,实现基底的高灵敏度检测和重现性.铁磁性层的引入对PS@Ag/Fe/Ag阵列的SERS增强具有较好的调控作用.

英文摘要：

Surface-enhanced Raman scattering （SERS） spectroscopy has been widely used in life smence, chemistry, medicine and many other areas. In this paper, we presented a two-dimensional ordered polystyrene （PS） microsphere array by self-assembly technology and used magnetron sputtering system to prepare seminanoshell array of Ag/Fe/Ag on the PS array. By changing sputtering time of magnetic layer Fe, we prepared the different thicknesses of core-shell SERS active substrates. We applied an excitation wavelength of 532 nm and used P-aminothiophenol as a probe molecule to study SERS property and enhancement factor can reach 10^7.