Solution Conductivity as a Key Factor for Thin Silica Coating on Colloidal Silver
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概要
- 論文の詳細を見る
In order to utilize silver nanoparticles for various applications such as photocatalysts while maintaining their chemical stability, enhanced electric fields on the nanoparticle surfaces induced by localized surface plasmon excitation must be used effectively. For satisfying these requirements, an ultrathin silica coating with a thickness of only a few nm was formed around silver nanoparticles by a chemical reaction in a solution, while parameters such as the amount of sodium silicate and the number of dialysis procedures performed were changed. As a result, it was found that a key factor for obtaining stable thin-silica-coated silver nanoparticles is the conductivity of the solution. Using a solution with an appropriate conductivity above 2.7 mS/m, silica films can be coated on silver nanoparticles without causing deterioration of the plasmonic activity resulting from the aggregation of silver.
- 2009-06-25
著者
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Awazu Koichi
Center For Applied Near-field Optics Research (can-for) National Institute Of Advanced Industrial Sc
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Ohki Yoshimichi
Department Of Electrical Electronic And Computer Engineering Waseda University
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Fujii Shinji
Department Of Biological Function Faculty Of Agriculture Okayama University
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Fujii Shinji
Department of Electrical Engineering and Bioscience, Waseda University, Shinjuku, Tokyo 169-8555, Japan
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Nomura Ken-ichi
Department of Electrical Engineering and Bioscience, Waseda University, Shinjuku, Tokyo 169-8555, Japan
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Fujimaki Makoto
Center for Applied Near-Field Optics Research, AIST, Tsukuba, Ibaraki 305-8562, Japan
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Fukuda Nobuko
Photonics Research Institute, AIST, Tsukuba, Ibaraki 305-8568, Japan
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Hirakawa Tsutomu
Research Institute for Environmental Management Technology, AIST, Tsukuba, Ibaraki 305-8569, Japan
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Awazu Koichi
Center for Applied Near Field Optics Research (CAN-FOR), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8562, Japan
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Awazu Koichi
Center for Applied Near-Field Optics Research, AIST, Tsukuba, Ibaraki 305-8562, Japan
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Fujimaki Makoto
Center for Applied Near-Field Optics Research (CAN-FOR), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 4, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8562, Japan
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Nomura Ken-ichi
Department of Electrical Engineering and Bioscience, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
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