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Issue 21, 2007
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Synthesis of Ag and Au nanostructures in an ionic liquid: thermodynamic and kinetic effects underlying nanoparticle, cluster and nanowire formation

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Abstract

The in situ reduction of dissolved Ag+ or Au3+ to the zero valent state in the distillable ionic liquid DIMCARB is reported. The reduction process leads to both 1D and 3D nanostructure formation, i.e. nanoparticles and nanowires and clusters composed of nanoparticles. The nanostructures formed have been characterised using UV/vis spectroscopy, powder X-ray diffraction and atomic force microscopic (AFM) topographic and phase imaging. Ag nanostructure growth occurs as a solution based crystallisation process. However, real time AFM imaging of Ag nanostructures formed when poly(vinyl pyrrolidone) is present shows the growth of nanowires on a mica surface via a surface confined process involving Ag atom diffusion. The growth of Au nanowires also occurs via the surface diffusion process. Based on the experimental results, a nanostructure growth mechanism in DIMCARB is proposed and 1D or 3D nanostructure growth is related to either a thermodynamic or a kinetic pathway.

Graphical abstract: Synthesis of Ag and Au nanostructures in an ionic liquid: thermodynamic and kinetic effects underlying nanoparticle, cluster and nanowire formation

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Supplementary files

Article information


Submitted
11 Dec 2006
Accepted
14 Feb 2007
First published
13 Mar 2007

J. Mater. Chem., 2007,17, 2241-2250
Article type
Paper

Synthesis of Ag and Au nanostructures in an ionic liquid: thermodynamic and kinetic effects underlying nanoparticle, cluster and nanowire formation

A. I. Bhatt, Á. Mechler, L. L. Martin and A. M. Bond, J. Mater. Chem., 2007, 17, 2241
DOI: 10.1039/B618036A

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