基于聚苯乙烯微球阵列模板法制备有序纳米结构及表面增强拉曼应用

摘要

以规则排列聚苯乙烯微球阵列为模板,在平面衬底上获得了六角形排列的开口球腔结构,在微观曲面衬底上制备了3种不同纳米球腔结构.偏振紫外可见吸收光谱表明,开口纳米球腔阵列光学性质以π/3为周期.两种基底对4-巯基苯甲酸(4-MBA)表面增强拉曼散射(SERS)增强能力的差异证明球腔型纳米结构的拉曼增强能力来源于开口部分.利用球腔型SERS基底实现了对农药甲基对硫磷的检测,此类基底具有用于农药残留分析的潜力.%In this paper,hexagonally ordered arranged spherical nanocavity structure with opened mouth on plane substrate and three different spherical nanocavity structures on micro-convex substrate were prepared using ordered array of polystyrene microsphere as a template.Polarized ultraviolet-visible absorption spectra of spherical nanocavity array showed a optical property regular change with π/3 as a period.The difference in surface enhanced Raman scattering(SERS) intensity of 4-mercaptobenzoic acid(4-MBA) on these two type of substrates clearly indicated that enhance of Raman signal came from opened mouth region.The spherical nanocavity SERS substrates were used to detect pesticide methyl parathion and revealed a potential for analyzing pesticide residues.