Silver-Coated Polydiacetylene Nanocrystals Fabricated Using Surfactants as Binder
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概要
- 論文の詳細を見る
A method of fabricating polydiacetylene (PDA) nanocrystals covered with silver nanoparticles was established using surfactant as a binder between the PDA core and silver nanoparticles, and the linear optical properties were examined in relation with their structure. Noble metal-coated PDA nanocrystals are expected to enlarge effective third-order nonlinear optical susceptibility $\chi^{(3)}$, due to the enhancement of the optical electric field induced by localized surface plasmon. The well-defined PDA nanocrystal cores were first prepared by the conventional reprecipitation method. The following two-step reduction, namely, seed deposition and seed growth, enabled higher silver coverage on the surface of PDA nanocrystals. In particular, silver deposition succeeded by employing an anionic surfactant, because of electrostatic attraction with silver cations. It was also important to optimize concentration and the affinity of surfactant for PDA. The extinction spectra of the PDA nanocrystals covered with silver exhibited a strong localized surface plasmon peak of silver, distinct from the already-reported inverse core-shell-type structure, which would contribute to efficient enhancement of $\chi^{(3)}$.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2006-01-15
著者
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MASUHARA Akito
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
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Nakanishi Hachiro
Institute For Chemical Reaction Science Tohoku University
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Sekiguchi Takashi
Nanomaterials Laboratory National Institute For Materials Science
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Kasai Hitoshi
Institute For Multidisciplinary Research For Advanced Materials Tohoku University
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Oikawa Hidetoshi
Nanomaterials Laboratory National Institute For Materials Science
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Oikawa Hidetoshi
Nanomaterials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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Onodera Tsunenobu
Nanomaterials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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Tan Zhenquan
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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Masuhara Akito
Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Aoba-ku, Sendai 980-8577, Japan
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Masuhara Akito
Institute for Multidisciplinary Research for Advanced Materials, Tohoku University
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