Synthesis of colloidal optical crystal and it's application for photochemistry

胶体光学晶体的合成及其在光化学中的应用

• 批准号: 13440207
• 负责人: NAKABAYASHI Seiichiro
• 金额: $ 9.47万
• 依托单位: Saitama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13440207/
• 关键词: colloidal crystal; nano-dispersed colloid; structural color; photonic crystal; magnetic particle; magnetic control; photoexcited states; 磁気物性; コロイド結; 構造色; 単分散コロイド; 光結晶; 磁気微粒子; 磁気制御; 励起寿命; 光化学

Programmed change of the structural color of colloidal crystals is practical importance for photonic devices. Also, photophysical and photochemical processes inside the colloidal crystal is interesting with relation to optical confinement. A promising solution for the tenability is to apply external magnetic field to highly deionized colloidal suspension of the mono-dispersed composite particles that contain magnetic core inside the dielectric shell. We have investigated the magnetic tenability of the structural color of the maghemite/silica composite particle colloid. We followed the reported synthetic procedure to obtain the nearly mono-dispersed colloidal suspension show the magnetic tenability as is expected. The reflectance peak shifted towards the longer wavelength by 2Onm, upon the application of magnetic field (〜0.2T). Other results including the thermal fluctuation of the particle packed in the colloidal crystal and the enlargement of the lifetime of the fluorescence was examined.

胶体晶体的结构颜色的编程变化对于光子设备来说是实际的重要性。同样，胶体晶体内部的光物理和光化学过程与光学限制有关。持续性的一个承诺解决方案是将外部磁场应用于单分散的复合颗粒的高度去离子胶体悬浮液，这些胶体颗粒在旧金山内包含磁芯。我们已经研究了Maghemite/二氧化硅复合粒子胶体的结构颜色的磁性宽度。我们遵循了据报道的合成程序，以获得几乎单分散的胶体悬浮液显示的磁性态度如预期。在应用磁场（〜0.2T）时，反射率峰向更长的波长朝较长的波长移动。其他结果包括检查胶体晶体中堆积的粒子的热波动以及荧光寿命的膨胀。

项目成果

E.Mishina, Q.-K.Yu, T.Tamura, H.Sakaguchi, A.Karantonis, S.Nakabayashi: "Kinetic profile of adsorption and self-assembling of thiophene oligomers studied by optical second harmonic generation"Surface Science. 544. 259-277 (2003)

E.Mishina、Q.-K.Yu、T.Tamura、H.Sakaguchi、A.Karantonis、S.Nakabayashi：“通过光学二次谐波产生研究噻吩低聚物的吸附和自组装的动力学曲线”表面科学。

E.Mishina, Y.Miyakita, Q.-K.Yu, H.Sakaguchi, S.Nakabayashi: "Nonlinear Optical Properties of Oligothiophene Self-Assembled Monolayers on Gold Substrate"J.Chem.Phys.. 117. 4016-4021 (2002)

E.Mishina、Y.Miyakita、Q.-K.Yu、H.Sakaguchi、S.Nakabayashi：“金基板上低聚噻吩自组装单层膜的非线性光学性质”J.Chem.Phys.. 117. 4016-4021 (

T.Fujita, C.Dushkin, M.Nawa, S.Nakabayashi: "Variation of Susceptibility as Observed by Magnetic Levitation of Liquid Droplets"Chem.Lett.. 10. 992-993 (2001)

T.Fujita、C.Dushkin、M.Nawa、S.Nakabayashi：“通过液滴磁悬浮观察到的磁化率变化”Chem.Lett.. 10. 992-993 (2001)

A.Karautonis, S.Nakabayashi: "Laser Experiments,Theoretical Modeling for the Diagnousis…"J.Bitrcations.Chaos. 11. 1275-1295 (2001)

A.Karautonis、S.Nakabayashi：“激光实验、诊断理论模型……”J.Bitrcations.Chaos。11. 1275-1295 (2001)

M.Nawa, R.Baba, S.Nakabayashi, C.Dushkin: "Ordering Effect of high magnetic Field on Silver Nanoparticle Arrays for Electron Transfer Devices"Nano.Lett. 3. 293-297 (2003)

M.Nawa、R.Baba、S.Nakabayashi、C.Dushkin：“高磁场对电子转移装置的银纳米粒子阵列的排序效应”Nano.Lett。