Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 330, Issue 2-3, Pages 143-150Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2008.07.043
Keywords
Gold nanoparticle; Microwave; Polyelectrolyte; 'Aggregates'; Synthesis
Categories
Funding
- NSF [0506082]
- Department of Mechanical Engineering, Texas AM University
- Texas Engineering Experiments Station
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0506082] Funding Source: National Science Foundation
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'Aggregates' of monodispersed gold nanoparticles were synthesized for the first time in large quantities. Those particles were made in presence or in absence of gold seed in a polyelectrolyte solution using microwave heating for about 30-60s. The average diameters of the particles calculated from TEM and SEM analysis were 22 +/- 2 nm. Our analysis found that the polyelectrolyte acted as a reducing as well as a stabilizing agent. It controlled the growth of particles by aligning them on the polymeric chain and the nanoparticles were subsequently self-assembled to form an 'aggregate' structure. The synthetic procedure is very fast and the particles are stable for at least 6 months under ambient conditions. (C) 2008 Elsevier B.V. All rights reserved.
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