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Citation: SHI Jian-zhen, FANG Jing-huai, MU Ren-wang, LI Ya-li. Preparation of Au Core-Ag Shell Nanoparticles Film and Its SERS Activity Study[J]. Acta Physico-Chimica Sinica, ;2006, 22(02): 135-140. doi: 10.3866/PKU.WHXB20060202 shu

Preparation of Au Core-Ag Shell Nanoparticles Film and Its SERS Activity Study

1.
College of Science, Nantong University, Jiangsu Nantong 226007, P. R. China; Department of Computer Science and Engineering, Southeast University, Nanjing 220000, P. R. China

Received Date: 14 June 2005
Available Online: 22 January 2006

ld colloids prepared through chemical reduction were self-assembled on the surface of quartz slide to form Au colloidal films. The obtained Au colloidal films were immersed into the mixture of silver enhancer and initiator to fabricate Au core-Ag shell nanoparticles films. The optical characteristics and surface morphology of Au core-Ag shell nanoparticles films prepared under different conditions were characterized by means of UV-Vis spectroscopy and atomic force microscopy. The performance of these Au core-Ag shell nanoparticles films used as SERS-active substrates was evaluated using crystal violet as a molecular probe by the measurement of corresponding surface enhanced Raman spectrum (SERS). It was found that both the distribution of Au colloidal particles on the surface of quartz and the reaction time significantly influence the formation of Au core-Ag shell nanoparticles films. The research results indicate that the Au core-Ag shell nanoparticles film with suitable particles size and od SERS activity can be obtained by controlling the reaction condition.
- ld nanoparticle;Au core-Ag shell nanoparticle;SERS;Electrostatic self-assembly;Nanoparticles film
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