| Budget Amount *help |
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2002: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2001: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2000: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Research Abstract |
(1) A substitution-type electroless Au plating of surfactant tubules formed spiral Au nanowires along the seams of the tubules or the edges of the bilayer ribbons which are precursors of the tubules.
(2) Variouis type of tubules can be parepared by varying the condition for the preparation of the tubules. The Au nanowires prepared on them were fibrous, yarn-type, spiral, double helical, multi-helical depending on the type of the tubules.
(3) The metallic nanowires were separated from the organic/inorganic combined aggregates thus prepared by extraction of the surfactant with organic solvent or the heat treatment of the tubules. Therefore, fibrous, yarn-type, spiral, double helical, multi-helical Au nanowires were obtained.
(4) The location of the Au adsorption on the tubule was presumed to be the electron-rich triple bond of the surfactant structure. The tubules prepared from a surfactant without multiple-bond resulted no plating. A tubule prepared from polyaniline, an electrically conducting polymer,was successfully plated with Au.
(5) A heat treatment of the Au-plated tubules of polyaniline partly formed many thin Au nanowires. The mechanism is currently unknown. It may become a new method for the preparation of thin gold nanowires. The study may also provide a hint for the structure of polyaniline tubules.
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