Song, Yujiang and Garcia, Robert M. and Dorin, Rachel M. and Wang, Haorong and Qiu, Yan and Coker, Eric N. and Steen, William A. and Miller, James E. and Shelnutt, John A. (2007) Synthesis of platinum nanowire networks using a soft template. NANO LETTERS, 7 (12). pp. 3650-3655.
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Official URL: http://pubs.acs.org/doi/abs/10.1021/nl0719123
Platinum nanowire networks have been synthesized by chemical reduction of a platinum complex using sodium borohydride in the presence of a soft template formed by cetyltrimethylammonium bromide in a two-phase water-chloroform system. The interconnected polycrystalline nanowires possess the highest surface area (53 +/- 1 m(2)/g) and electroactive surface area (32.4 +/- 3.6 m(2)/g) reported for unsupported platinum nanomaterials; the high surface area results from the small average diameter of the nanowires (2.2 nm) and the 2-10 nm pores determined by nitrogen adsorption measurements. Synthetic control over the network was achieved simply by varying the stirring rate and reagent concentrations, in some cases leading to other types of nanostructures including wormlike platinum nanoparticles. Similarly, substitution of a palladium complex for platinum gives palladium nanowire networks. A mechanism of formation of the metal nanowire networks is proposed based on confined metal growth within a soft template consisting of a network of swollen inverse wormlike micelles.
|Subjects:||Physical Science > Nano objects|
Material Science > Nanochemistry
Material Science > Nanostructured materials
|Deposited By:||Farnush Anwar|
|Deposited On:||03 Dec 2008 13:48|
|Last Modified:||20 Jan 2009 16:18|
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