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Journal of Nanomaterials
Volume 2013 (2013), Article ID 531760, 6 pages
http://dx.doi.org/10.1155/2013/531760
Research Article

One-Step Synthesis of PEG-Coated Gold Nanoparticles by Rapid Microwave Heating

1Nano Hybrid Technology Research Center, Creative and Fundamental Research Division, Korea Electrotechnology Research Institute (KERI), Changwon-si 642-120, Republic of Korea
2University of Science & Technology (UST), Changwon-si 642-120, Republic of Korea
3Max Planck Institute for the Science of Light, 91058 Erlangen, Germany

Received 15 January 2013; Revised 21 February 2013; Accepted 22 February 2013

Academic Editor: Renyun Zhang

Copyright © 2013 Seung Kwon Seol 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

Polyethylene Glycol- (PEG-) coated gold nanoparticles (PEG-AuNPs) are synthesized by a one-step route with rapid microwave heating. Homogeneous nucleation of the primary gold particles is enhanced by increasing the applied microwave power during the initial stage of the synthesis, increasing the temperature ramping rate ( ) and resulting in decreased size and improved uniformity of the synthesized PEG-AuNPs. Using rapid microwave heating, we successfully produce uniform colloidal PEG-AuNPs with an average diameter of  nm within a few minutes. By appropriate tuning of the growth parameters, microwave synthesis can produce largely colloidal PEG-AuNPs with high uniformity.