Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 131, Issue 1-2, Pages 331-335Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2011.09.050
Keywords
Nanostructures; Chemical synthesis; Colloidal gold nanoparticles (AuNPs); Microwave synthesis, Microwave power; Solution pH; Homogenous formation; Scale up production
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We describe formation kinetics of gold nanoparticles (AuNPs) in microwave synthesis. Using high microwave power to increase the temperature ramping rate (R-r) homogeneous nucleation is facilitated and the size of the resultant nanoparticles is reduced while the uniformity is much improved. Adjusting solution pH to higher than 6.2 could also have a positive effect on the quality of the nanosol. We therefore demonstrate that by adjusting these reaction parameters in microwave synthesis, we successfully produced uniform colloidal AuNPs with diameter of 12.04 +/- 1.35 nm in a few minutes. (C) 2011 Elsevier B.V. All rights reserved.
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