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동향자료
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Tojo, Tomohiro (Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology) Inada, Ryoji (Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology) Sakurai, Yoji (Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology) Kim, Yoong Ahm (Department of Polymer Engineering, Graduate School, School of Polymer Science and Engineering & Alan G. MacDiarmid Energy Research Institute, Chonnam National University)
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한국탄소학회 Carbon letters Carbon letters 제27권
발행연도
2018.1
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35 - 41 (7page)

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Surfactant-wrapped separation methods of metallic and semiconducting single-walled carbon nanotubes (SWCNTs) can result in large changes in intrinsic physical and chemical properties due to electronic interactions between a nanotube and a surfactant. Our approach to synthesize SWCNTs with an electronic feature relied on utilizing carbon nanorings, [n] cycloparaphenylenes ([n]CPPs), which are the fundamental unit of armchair type SWCNTs (a-SWCNTs) that possess a metallic feature without any surfactants. To obtain long tubular structures from [n]CPPs, the host-guest complexes formed with well-aligned [n]CPP hosts and various fullerene guests on a silicon substrate were pyrolyzed under an ethanol gas flow at a high temperature with focused-ultraviolet laser irradiation. The pyrolyzed [n]CPPs were observed to transform from nanorings to tubular structures with 1.5-1.7 nm diameters corresponding to the employed diameter of [n]CPPs. Our approach suggests that [n]CPPs are useful for structure-controlled synthesis of SWCNTs.

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