Deposition of silver nanoparticles on single wall carbon nanotubes via a self assembled block copolymer micelles |
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Authors: | Himadri Acharya Jinwoo Sung Hye-in Shin Soo-Young Park Byung Gil Min Cheolmin Park |
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Affiliation: | 1. Department of Materials Science and Engineering, Yonsei University, Seoul 120-749, Republic of Korea;2. Department of Polymer Science, Kyungpook National University, #1370 Sangyuk-dong, Buk-gu, Daegu 702-701, Republic of Korea;3. School of Advanced Materials and System Engineering, Kumho Institute of Technology, Kumi, Republic of Korea |
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Abstract: | We demonstrate a facile route to decorate the surface of networked single walled carbon nanotubes (SWNTs) with silver nanoparticles (Ag NPs). The method is based on utilization of either spherical poly(styrene-b-4vinylpyridine) (PS-b-P4VP) or cylindrical poly(styrene-b-acrylic acid) (PS-b-PAA) copolymer micelles capable of stabilizing nanotubes in solution and subsequently forming a thin and uniform block copolymer/SWNTs composite film upon spin coating. The selective doping of silver acetate into either P4VP or PAA domains in a thin composite film, followed by thermal treatment, results in the formation of Ag NPs in the cores of micelles. Further heat treatment at 500 °C sufficiently high for degrading both block copolymers allows us to fabricate a thin SWNTs network in which Ag NPs are efficiently deposited on the surface of nanotubes. A sharp surface plasmon absorption band around 400 nm of the networked SWNTs with Ag NPs confirms the presence of Ag NPs with narrow distribution in their size. |
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