银/铂双金属中空纳米颗粒的制备及光学性质研究

doi:10.7517/j.issn.1674-0475.2006.05.360

影像科学与光化学 ›› 2006, Vol. 24 ›› Issue (5): 360-365.DOI: 10.7517/j.issn.1674-0475.2006.05.360

银/铂双金属中空纳米颗粒的制备及光学性质研究

高继宁^1,2, 任湘菱¹, 唐芳琼¹

1. 中国科学院, 理化技术研究所, 北京, 100080;
2. 中国科学院, 研究生院, 北京, 100039

收稿日期:2006-04-13 修回日期:2006-05-24 出版日期:2006-09-23 发布日期:2006-09-23
通讯作者: 唐芳琼,E-mail:tangfq@mail.ipc.ac.cn.
基金资助:
国家自然科学基金面上项目(60372009,60572031);北京市自然科学基金项目(4063042)

Preparation and Optical Properties of Ag/Pt Bimetallic Hollow Nanoparticles

GAO Ji-ning^1,2, REN Xiang-ling¹, TANG Fang-qiong¹

1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China;
2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, P. R. China.

Received:2006-04-13 Revised:2006-05-24 Online:2006-09-23 Published:2006-09-23

摘要/Abstract

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.

关键词: 中空纳米颗粒, 双金属纳米颗粒, 表面等离子共振, 表面增强拉曼光谱

Abstract: 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 interiors.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.

Key words: hollow nanoparticles, bimetallic nanoparticles, surface plasmon resonance, surface enhanced Raman spectroscopy

中图分类号:

高继宁, 任湘菱, 唐芳琼. 银/铂双金属中空纳米颗粒的制备及光学性质研究[J]. 影像科学与光化学, 2006, 24(5): 360-365.

GAO Ji-ning, REN Xiang-ling, TANG Fang-qiong. Preparation and Optical Properties of Ag/Pt Bimetallic Hollow Nanoparticles[J]. Imaging Science and Photochemistry, 2006, 24(5): 360-365.

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银/铂双金属中空纳米颗粒的制备及光学性质研究

Preparation and Optical Properties of Ag/Pt Bimetallic Hollow Nanoparticles

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