不同形状的金纳米粒子的表面增强拉曼光谱  

Surface-enhanced Raman Spectroscopic Study of Gold Nanoparticles with Different Shapes

作　　者：胡建强[1] 张勇[1] 任斌[1] 韩国彬[1] 杨志林[1] 田中群[1] 

机构地区：[1]厦门大学化学系固体表面物理化学国家重点实验室,厦门361005

出　　处：《光散射学报》2003年第2期63-65,共3页The Journal of Light Scattering

基　　金：国家自然科学基金创新群体研究资助项目(20021002);国家自然科学基金九五重点项目(29833060)

摘　　要：使用514 5nm激光激发,第一次得到了不同形状金纳米粒子的表面增强拉曼光谱(SERS)。一般情况下,较短波长(<600nm)激发所获得的增强要小于使用较长波长(>600nm)的激发。然而,对特殊形状的自组装金纳米粒子,由于避雷针效应,即使使用绿光激发也可获得很高增强的SERS。In this communication, we obtained for the first time the SERS spectra of gold at the laser excitation of 514.5 nm by fabricating the ordered array of gold nanoparticles with special shapes, e.g., sphere, tadpole, and pearlchain. Selfassemble method of these gold nanoparticles is briefly introduced. In general, the enhancement of gold by the laser excitation of short wavelength (<600 nm) is much less than that of longer wavelength (>600 nm) becuase that the coupling between conduction electrons and interband electronic transitions by using 514.5 nm depresses the quality of the surface plasmon resonance of gold metals considerably. Our observation reveals that the SERS of selfassembly gold nanoparticles with special shape can be rather high even using the green light excitation, which is mainly due to the lightningrod effect.

关 键 词：金纳米粒子 表面增强拉曼光谱 目组装 避雷针效应 SERS 

分 类 号：TG146.31[一般工业技术—材料科学与工程] TB383[金属学及工艺—金属材料]