4.7 Article

High-yield synthesis of multi-branched gold nanoparticles and their surface-enhanced Raman scattering properties

Journal

JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 329, Issue 1, Pages 97-102

Publisher

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2008.10.004

Keywords

Multi-branched gold nanoparticles; Hydrazine; SERS; Aspect ratio

Funding

  1. Korea Research Foundation
  2. Korean Government (MOEHRD) [KRF-2007-313-C00368]
  3. MOST/KOSEF to the Environmental Biotechnology National Core Research Center [R15-2003-012-01001-0]

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Multi-branched gold nanoparticles were synthesized in high-yield through the reduction of HAuCl4 by using hydrazine as a reducing agent. Practically 100% of the particles have numerous branches. The high reduction capability of hydrazine is found to be crucial for the formation of these branched gold nanoparticles. Their size can be controlled from 20 to 130 nm by varying the amounts of hydrazine. The prepared nanoparticles exhibit efficient surface-enhanced Raman scattering (SERS) properties and the SERS activity of the particles depends on the aspect ratio of their branches, which are most likely related to a great increase in the localized electromagnetic field enhancement from their unique Sharp Surface features arising from the branches. (C) 2008 Elsevier Inc. All rights reserved.

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