Please use this identifier to cite or link to this item: https://doi.org/10.1021/jp068666o
Title: New insights on the nanoparticle growth mechanism in the citrate reduction of gold(III) salt: Formation of the Au nanowire intermediate and its nonlinear optical properties
Authors: Pong, B.-K.
Elim, H.I. 
Chong, J.-X.
Ji, W. 
Trout, B.L.
Lee, J.-Y. 
Issue Date: 3-May-2007
Source: Pong, B.-K., Elim, H.I., Chong, J.-X., Ji, W., Trout, B.L., Lee, J.-Y. (2007-05-03). New insights on the nanoparticle growth mechanism in the citrate reduction of gold(III) salt: Formation of the Au nanowire intermediate and its nonlinear optical properties. Journal of Physical Chemistry C 111 (17) : 6281-6287. ScholarBank@NUS Repository. https://doi.org/10.1021/jp068666o
Abstract: The synthesis of gold nanospheres via the reduction of AuCL 4 - salt by sodium citrate has been revisited, with focus on the mechanism of particle growth. In stark contrast to the widely accepted LaMer nucleation-growth model, the initially formed nanoclusters of about 5 nm diameter self-assemble to form an extensive network of nanowires. The diameter of the nanowires progressively increases in size, and at the same time the connected network is fragmented into small segments before the final spherical particles are formed. We put forward a modified nanocrystal growth mechanism, which is able to explain a number of other experimental observations. By arresting the reduction process by rapid cooling, the 5 nm diameter nanowires could be isolated and were found to be very stable. The nonlinear optical properties of the Au nanowires were investigated and discussed. Highly connected, small diameter nanowires of highly conductive metals may be useful for future electronic applications, e.g., conductive polymer - metal composites with low metal loading. © 2007 American Chemical Society.
Source Title: Journal of Physical Chemistry C
URI: http://scholarbank.nus.edu.sg/handle/10635/89578
ISSN: 19327447
DOI: 10.1021/jp068666o
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

172
checked on Feb 20, 2018

WEB OF SCIENCETM
Citations

153
checked on Nov 18, 2017

Page view(s)

71
checked on Feb 23, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.