【中文文摘】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)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。
【英文文摘】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 pearlchain. Selfassemble method of these gold nanoparticles is briefly introduced. In general, the enhancement of gold by the laser excitation of short 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 self2assembly
gold nanoparticles with special shape can be rather high even using the green light excitation , which is mainly due to the lightning2rod effect.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
