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中文摘要：
通过以Ag纳米颗粒为模板的置换和沉积反应，制备了Ag／Pt双金属复合纳米颗粒、用透射电子显微镜（TEM）对颗粒的形貌、尺寸和结构进行了表征，发现复合颗粒具有中空结构．紫外可见吸收光谱（UV-Vis）研究表明，Ag／Pt双金属中空复合纳米颗粒具有单峰的表面等离子共振吸收特征，随着反应溶液中氯铂酸和硝酸银摩尔比的增加，吸收峰先红移后蓝移．表面增强拉曼光谱实验结果表明，Ag／Pt双金属复合纳米颗粒对吡啶分子具有较好的增强效果．
英文摘要：
Bimatallic Ag/Pt nanoparticles were PrePared based on Ag nanoparticle-mediated replacement and deposition reactions. The morphology, size, and structure of the bimetallic nanoparticles were characterized by transmission electron microscopy; it was found that these nanoparticles are bearing hollow imeriors. The UV-Vis absorption spectra show the characteristic of single plasmon resonance absorption band and the peak initially red shift and then blue shift with increasing the molar ratio of H2PtCl6 to AgNO3 in the reacting solution. Surface enhanced Raman spectroscopy results show that these nanoparticles remain SERS active when pyridine was used as adsorbate probe.
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