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Journal of NanomaterialsVolume 2011 2011, Article ID 265287, 7 pages

Research Article

Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Republic of Korea

Nano Process Division, Patterning Process Department, Korea Advanced Nano Fab Center, Suwon 443-270, Republic of Korea

4D Labs and Department of Chemistry, Simon Fraser University, Burnaby, BC, Canada V5A 1S6

Received 9 April 2010; Revised 26 May 2010; Accepted 26 July 2010

Academic Editor: Bo Zou

Copyright © 2011 Hyeong-Ho Park et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A simple synthesis of Ag nanostructures such as nanorods and nanowires has been demonstrated with citrate-capped Pt seeds. UV-visible spectra and photographs of the synthesized solutions at different UV exposure times showed that the citrate-capped Pt seed played a crucial role in the growth of Ag nanostructures. After UV exposure of the colloidal solution for 60 min, the average diameter, length, and aspect ratio of the Ag nanostructures were about 95 nm, 2.1 m, and 22, respectively. The photochemical reduction is hypothesized to result from photoelectron transfer from adsorbed citrate to Pt nanoparticle seed allowing Ag ions to form Ag nanostructures. Based on X-ray diffraction spectra and transmission electron microscope images, the synthesized Ag nanostructures were a face-centered cubic single crystal with good purity. These results suggest that the photochemical reduction method can provide Ag nanostructures in the presence of citrate-capped Pt seeds at room temperature for anisotropic Ag products.





Autor: Hyeong-Ho Park, Xin Zhang, Yong-June Choi, Hyung-Ho Park, and Ross H. Hill

Fuente: https://www.hindawi.com/



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