Spherical Dye-Doped Silica Particles

被引：20

作者：

Shibata, S. ^{[1
]}

Taniguchi, T. ^{[1
]}

Yano, T. ^{[1
]}

Yasumori, A. ^{[1
]}

Yamane, M. ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Inorgan Mat, Megro Ku, Tokyo 152, Japan

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 1994年 / 2卷 / 1-3期

关键词：

monomer dispersion in spheres; photochemical hole burning; microcavity effect;

D O I：

10.1007/BF00486344

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Organic dyes such as water soluble porphyrins were incorporated into monodispersed SiO2 particles using the sol-gel technique (the Stober synthesis) and their monomeric and dimeric properties were investigated by aiming at the microcavity effect. Doping efficiencies of dyes into SiO2 particles depended on dye's hydrophilic properties. The doping efficiency of a porphyrin, TTMAPP, decreased with increasing the nominal content in the starting solution and the doping content showed the maximum value of 1.6 x 10(-5) mol/g SiO2. With increasing the TTMAPP content, spectra of doped particles were changed from dimeric to monomeric nature; the absorption peak due to dimers disappeared and halfwidth of absorption at Soret band decreased. This unusual change was caused by the decrease of particle sizes by dye doping. The TTMAPP-doped sample having monomeric spectrum showed the fluorescence life time of 8.5 nsec and photochemical hole burning at about 5 K.

引用

页码：755 / 759

页数：5

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