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Welding of Gold Nanoparticles on Graphitic Templates for Chemical Sensing

Type of Publication
Year of Publication
2012
Authors

M. Ding; D.C. Sorescu; G.P. Kotchey; A. Star

Abstract

Controlled self-assembly of zero-dimensional gold nanoparticles and construction of complex gold nanostructures from these building blocks could significantly extend their applications in many fields. Carbon nanotubes are one of the most promising inorganic templates for this strategy because of their unique physical, chemical, and mechanical properties, which translate into numerous potential applications. Here we report the bottom-up synthesis of gold nanowires in aqueous solution through self-assembly of gold nanoparticles on single-walled carbon nanotubes followed by thermal-heating-induced nanowelding. We investigate the mechanism of this process by exploring different graphitic templates. The experimental work is assisted by computational studies that provide additional insight into the self-assembly and nanowelding mechanism. We also demonstrate the chemical sensitivity of the nanomaterial to parts-per-billion concentrations of hydrogen sulfide with potential applications in industrial safety and personal healthcare.

DOI

10.1021/ja210278u

Volume

134

Notes

Times Cited: 28 Star, Alexander/C-3399-2013; Ding, Mengning/P-6354-2014 29

Pagination

3472-3479

Number
7
ISSN Number

0002-7863

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