Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (6): 1084.

• Articles • Previous Articles     Next Articles

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.

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

TrendMD: