Bulletin of the American Physical Society
2006 APS March Meeting
Monday–Friday, March 13–17, 2006; Baltimore, MD
Session B10: Focus Sessions: Physical Chemistry of Nanoscale System II
11:15 AM–2:15 PM,
Monday, March 13, 2006
Baltimore Convention Center Room: 302
Sponsoring Unit: DCP
Chair: Haw Yang, University of California, Berkeley; Clemens Burda, Case Western Reserve University
Abstract ID: BAPS.2006.MAR.B10.10
Abstract: B10.00010 : Monitoring Gold Nanorod Synthesis based on their Localized Surface Plasmon Resonance*
1:51 PM–2:03 PM
Preview Abstract Abstract
(Department of Physics and Astronomy, Rice University)
(Department of Chemistry, Rice University)
(Department of Physics and Astronomy, and Chemistry, Rice University)
The extinction spectra of structurally anisotropic gold nanoparticles exhibit surface plasmon resonances that may be tuned through the visible and near-infrared portions of the electromagnetic spectrum by controlling their geometry. Gold nanorods, whose longitudinal extinction peak is proportional to their aspect ratio, are synthesized by reduction of gold chloride onto gold seed nanoparticles. While growth anisotropy is known to be induced by a surfactant (cetyltrimethylammonium bromide), the detailed growth mechanism is poorly understood. Here, we study the growth kinetics of nanorods by continually monitoring their extinction spectra during synthesis. The spectra are analyzed by Rayleigh-Gans theory to determine the instantaneous length and diameter of the growing nanorods. This data yields microscopic growth rates which provide insight into the mechanism of nanorod synthesis.
*This work is supported by the Robert A. Welch Foundation.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2006.MAR.B10.10
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