Halder, Aditi and Ravishankar, N (2006) Gold Nanostructures from Cube-Shaped Crystalline Intermediates. Journal of Physical Chemistry B, 110 (13). pp. 6595-6600.
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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp056648l
Conventional bottom-up approaches for building nanostructures rely on the ability to synthesize nanoparticles of different shapes and sizes in a controlled manner that are then assembled to produce useful structures. Here, we present an alternate approach for producing nanostructures based on the formation of a crystalline intermediate in which the metal ion can be reduced in a controlled manner. Partial reduction of HAuCl4 by a long-chain amine results in the formation of a cube-shaped crystalline intermediate in which Au is present in a +1 oxidation state. By control of the nucleation of the metal in the intermediate, a variety of nanostructures can be synthesized. Here, we present results on the formation of superlattices, hollow cubes, nanotubes, and extended hollow structures starting from the intermediate. Direct evidence for the formation of metal within the intermediate by in situ electron-beam-induced reduction in the transmission electron microscope is presented.
|Subjects:||Material Science > Nanostructured materials|
|Divisions:||Faculty of Engineering, Science and Mathematics > School of Chemistry|
|Deposited On:||27 Jan 2009 09:52|
|Last Modified:||27 Jan 2009 09:52|
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