高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (6): 1084.

• 研究论文 • 上一篇    下一篇

种子生长法制备Au-Ag纳米花

孙雪娇, 赵丽丽, 纪小会, 杨文胜   

  1. 吉林大学化学学院, 表面与界面化学吉林省重点实验室, 长春 130012
  • 收稿日期:2009-12-15 出版日期:2010-06-10 发布日期:2010-06-10
  • 通讯作者: 纪小会, 女, 博士, 讲师, 主要从事纳米晶的生长机制研究. E-mail: jixh@jlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20803029, 20773053, 50825202)资助.

Preparation of Au-Ag Nanoflowers by Seeding Approach

SUN Xue-Jiao, ZHAO Li-Li, JI Xiao-Hui*, YANG Wen-Sheng   

  1. Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2009-12-15 Online:2010-06-10 Published:2010-06-10
  • Contact: JI Xiao-Hui. E-mail: jixh@jlu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20803029, 20773053, 50825202)资助.

摘要:

以金纳米花为种子, 抗坏血酸和硝酸银混合物作为生长溶液制备了Au-Ag纳米花. 当Ag/Au的摩尔比从0增加到0.3时, 银可以在Au种子表面沉积, 得到的Au-Ag纳米花光谱在592~518 nm之间连续可调, 同时纳米花的枝长逐渐减小; 而当Ag/Au摩尔比大于0.3时, 还原的银出现自成核现象. 与Au纳米花相比, Au-Ag纳米花体现出了更好的Raman增强活性.

关键词: 纳米花; 种子生长法; Au; Ag; 表面增强拉曼

Abstract:

Au-Ag nanoflowers were prepared by gold nanoflowers as the seeds and the mixture of AgNO3 and ascorbic acid as the growth solution. With increasing the molar ratio of Ag/Au from 0∶1 to 0.3∶1, the surface plasmon band of the Ag-Au nanoflowers shifted from 592 nm to 518 nm. When the molar ratio was higher than 0.3∶1, there was obvious self-nucleation of Ag and the resulting Ag-Au composite particles became spherical-like in shape. Surface enhanced Raman scattering(SERS) measurements by p-mercaptobenzoic acid(p-MBA) indicated that the Au-Ag nanoflowers exhibited improved SERS activity than the gold ones.

Key words: Nanoflower; Seeding approach; Au; Ag; Surface-enhanced Raman scattering

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