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RESEARCH ARTICLE
Contents Vol 68(6)

Control of Gold Nanostructure Morphology by Variation of Temperature and Reagent Ratios in the Turkevich Reaction

Vivek Poonthiyil A B , Vladimir B. Golovko A B C and Antony J. Fairbanks A C
+ Author Affiliations
- Author Affiliations

A Department of Chemistry, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand.

B The MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6140, New Zealand.

C Corresponding authors. Emails: vladimir.golovko@canterbury.ac.nz; antony.fairbanks@canterbury.ac.nz

Australian Journal of Chemistry 68(6) 858-862 https://doi.org/10.1071/CH14446
Submitted: 9 July 2014  Accepted: 18 August 2014   Published: 18 November 2014

Abstract

In this paper, we demonstrate that the Turkevich reaction can be used to obtain not only spherical gold nanoparticles of various sizes, but also nanoparticles of different morphologies. The effect of the molar ratios of citrate to HAuCl4 at various temperatures has been studied. It was found that the reagent ratio plays a significant role in defining the morphology of the gold nanosystems formed at low temperatures. This study shows that by controlling the reagent ratios and the reaction temperature of the Turkevich reaction, nano-structured gold systems with various shapes, including spheres, wires, networks, and systems comprising polygonal nanoparticles only or nanochains only, with the latter two morphologies reported for the first time, can be obtained. The gold nanosystems obtained in this fashion were characterised by transmission electron microscopy and UV–visible absorption spectroscopy.


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