2007 NSTI Nanotechnology Conference and Trade Show - Nanotech 2007 - 10th Annual

A Mechanism and Knetic Growth Study for Gold Nanoparticles

X. Liu, J.P. Brennan and Q. Huo
Univeristy of Central Florida, US

kinetic, nanoparticles, oleylamine

Nanoparticle growth in solution is a rather complicated process governed by many thermodynamic and kinetics factors, while the growth kinetics and mechanism are not well understood. We herein report a mechanism and kinetic study of two nanoparticles: butane thiol (A) and oleylamine (B) protected gold nanoparticles. Our study revealed that the reproducibility of Brust-Schiffrin reaction for BtAuNPs synthesis is rather poor due to the intrinsic complexity of this two-phase reaction. TEM images showed that nanoparticles grew rapidly at early stage of reaction and reached a maximum then decreased to stable value. For OAAuNPs, FT-IR and 1H NMR exposed a conversion of oleylamine ligands to oleylamides after gold (III) was reduced to gold (I) and gold atoms. It’s found large Au-amine complex was formed fast and decomposed to tiny nanoparticles, then recombined to nanoparticles again. The oleylamide ligands formed a H-bonding network as a protecting monolayer around the nanoparticles. For both growth procedures, kinetic modeling was performed, by assuming that the nanoparticle core expands through incremental addition of gold atoms.

Back to Program

Sessions Sunday Monday Tuesday Wednesday Thursday Authors Keywords

Nanotech 2007 Conference Program Abstract


Names, and logos of other organizations are the property of those organizations and not of NSTI.
This event is not open to the general public and NSTI reserves the right to refuse admission and participation to any individual.