Shape/size-controlled syntheses of metal nanoparticles for site-selective modification of carbon nanotubes

Journal of the American Chemical Society
Liangti QuEiji Osawa

Abstract

Shape- and size-controlled syntheses of metal nanoparticles have been achieved by galvanic displacement reaction between an aqueous solution of metal salt and Cu foil substrate. In particular, cubic and spheric nanoparticles of Pt (Au) with a fairly narrow size distribution were produced by reacting K(2)PtCl(4) (HAuCl(4)) with a Cu foil in an aqueous medium with and without CuCl(2) under different reaction conditions (e.g., different concentrations and reaction times). In conjunction with the substrate-enhanced electroless deposition (SEED) technique (Qu, L.; Dai, L. J. Am. Chem. Soc. 2005, 127, 10806), the shape/size-controlled syntheses have been successfully exploited to site-selectively deposit these metal nanoparticles onto the outerwall, innerwall, or end-tip of carbon nanotubes (CNTs). Asymmetric sidewall modification by attaching the innerwall and outerwall of CNTs with metal nanoparticles of different shapes was also achieved. Furthermore, it was demonstrated that the nanotube-supported Pt nanoparticles could be converted into hollow Au nanoboxes by galvanic displacement of Pt with Au. These CNT-supported metal nanoparticles were shown to possess interesting optical and electrocatalytic properties.

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Citations

Apr 27, 2011·ACS Applied Materials & Interfaces·Sathish Kumar KSheela Berchmans
Mar 29, 2007·Chemical Communications : Chem Comm·Jiguang ZhangJillian M Buriak
Jan 26, 2008·Chemical Communications : Chem Comm·Liangti Qu, Liming Dai
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