Fabrication of Monodispersed, Multilayered Silica-Y:Eu-Silica Core-Shell Particles and Their Photonic Crystals
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概要
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Methods for preparing monodispersed, multilayered silica-Y:Eu-silica core-shell particles and for fabricating their colloidal photonic crystals are proposed. Silica-Y:Eu core-shell particles with a size of 360 nm were synthesized with a homogeneous precipitation method at 80°C in a 50/50 (v/v) water/propanol solution at 0.0009 mol/dm3 Y(NO3)3, 0.0001 mol/dm3 Eu(NO3)3, 0.5 mol/dm3 urea, 1 g/dm3 polyvinylpyrrolidone (PVP) and 0.01 vol% suspension of silica particles with an average size of 330 nm. Succeeding silica-coating of the silica-Y:Eu core-shell particles was performed in ethanol at 10 mmol/dm3 tetraethylorthosilicate, 11 mol/dm3 H2O, 0.5 mol/dm3 ammonia, 5 mmol/dm3 acetic acid, 1 g/dm3 PVP and 0.001 vol% suspension of silica:Eu core-shell particles. Consequently, multilayered silica-Y:Eu-silica core-shell particles with an average size of 460 nm and a coefficient of variation as low as 3.0% could be obtained. Colloidal crystals composed of these particles exhibited both reflection based on Bragg diffraction and luminescence of Y:Eu.
- 社団法人 化学工学会の論文
- 2009-03-01
著者
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IMAI Jun-ichi
Department of Electronic Engineering, The University of Electro-Communications
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Kobayashi Yoshio
Department of Biomolecular Functional Engineering, College of Engineering, Ibaraki University
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Imai Jun-ichi
Department Of Chemical Engineering Graduate School Of Engineering Tohoku University
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NAGAO Daisuke
Department of Chemical Engineering, Graduate School of Engineering, Tohoku University
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KONNO Mikio
Department of Chemical Engineering, Graduate School of Engineering, Tohoku University
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Konno M
Department Of Chemical Engineering Graduate School Of Engineering Tohoku University
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Konno Mikio
Department Of Chemical Engineering Graduate School Of Engineering Tohoku University
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Yoshio Kobayashi
Department Of Biomolecular Functional Engineering College Of Engineering Ibaraki University
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Nagao Daisuke
Department Of Chemical Engineering Graduate School Of Engineering Tohoku University
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Imai Jun-ichi
Department Of Cancer Biology Division Of Cellular And Molecular Biology University Of Tokyo
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Kobayashi Yoshio
Department Of Chemical Engineering Graduate School Of Engineering Tohoku University
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Kobayashi Yoshio
Department Cardiovascular Science and Medicine, Chiba University Graduate School of Medicine
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