Aerogels containing strongly photoluminescing zinc oxide nanocrystals

被引：48

作者：

Lorenz, C

Emmerling, A

Fricke, J

Schmidt, T

Hilgendorff, M

Spanhel, L

Muller, G

机构：

[1] Univ Wurzburg, Inst Phys, D-97074 Wurzburg, Germany

[2] Univ Wurzburg, Lehrstuhl Silicatchem, D-97070 Wurzburg, Germany

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1998年 / 238卷 / 1-2期

关键词：

D O I：

10.1016/S0022-3093(98)00679-6

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：

Sol-gel processing was used to prepare ZnO-doped silica-aerogels by hydrolysis and condensation of tetramethoxysilane (TMOS) in the presence of 6 nm sized nanocrystalline ZnO particles. Supercritical drying yielded strongly green-yellow fluorescing aerogels. Fluorescence excitation and emission spectra of the resulting ZnO particles in a silica matrix were preserved after the supercritical drying, in contrast to air sintering conditions under which the visible ZnO fluorescence is completely suppressed. Anomalous small angle X-ray scattering (ASAXS) was employed to evaluate the internal structure of these nanocrystalline precursors as well as the resulting nearly transparent aerogel samples. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

引用

收藏

页码：1 / 5

页数：5

相关论文

共 11 条

[1] ELECTRONIC WAVE-FUNCTIONS IN SEMICONDUCTOR CLUSTERS - EXPERIMENT AND THEORY [J].

BRUS, L .

JOURNAL OF PHYSICAL CHEMISTRY, 1986, 90 (12) :2555-2560

[2] ANOMALOUS DISPERSION CALCULATIONS NEAR TO AND ON THE LONG-WAVELENGTH SIDE OF AN ABSORPTION-EDGE [J].

CROMER, DT ;

LIBERMAN, DA .

ACTA CRYSTALLOGRAPHICA SECTION A, 1981, 37 (MAR) :267-268

[3] QUANTUM SIZE EFFECT IN SEMICONDUCTOR MICROCRYSTALS [J].

EKIMOV, AI ;

EFROS, AL ;

ONUSHCHENKO, AA .

SOLID STATE COMMUNICATIONS, 1985, 56 (11) :921-924

[4] JUSIFA - A NEW USER-DEDICATED ASAXS BEAMLINE FOR MATERIALS SCIENCE [J].

HAUBOLD, HG ;

GRUENHAGEN, K ;

WAGENER, M ;

JUNGBLUTH, H ;

HEER, H ;

PFEIL, A ;

RONGEN, H ;

BRANDENBERG, G ;

MOELLER, R ;

MATZERATH, J ;

HILLER, P ;

HALLING, H .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1989, 60 (07) :1943-1946

[5] SMALL-PARTICLE RESEARCH - PHYSICOCHEMICAL PROPERTIES OF EXTREMELY SMALL COLLOIDAL METAL AND SEMICONDUCTOR PARTICLES [J].

HENGLEIN, A .

CHEMICAL REVIEWS, 1989, 89 (08) :1861-1873

[6] Influence of Cd content and Se doping on the formation of CdSe nanocrystals in silica xerogels: A SAXS study [J].

Hummel, DA ;

Torriani, IL ;

Craievich, AF ;

Fox, ND ;

Ramos, AY ;

Lyon, O .

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 1997, 8 (1-3) :285-291

[7] ENCAPSULATION OF TIO2 IN ZEOLITE Y [J].

LIU, XS ;

IU, KK ;

THOMAS, JK .

CHEMICAL PHYSICS LETTERS, 1992, 195 (2-3) :163-168

[8] Quantized aggregation phenomena in II-VI-semiconductor colloids [J].

Platschek, V ;

Schmidt, T ;

Lerch, M ;

Muller, G ;

Spanhel, L ;

Emmerling, A ;

Fricke, J ;

Foitzik, AH ;

Langer, E .

BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1998, 102 (01) :85-95

[9] Activation of 1.54 μm Er3+ fluorescence in concentrated II-VI semiconductor cluster environments [J].

Schmidt, T ;

Muller, G ;

Spanhel, L ;

Kerkel, K ;

Forchel, A .

CHEMISTRY OF MATERIALS, 1998, 10 (01) :65-71

[10] SEMICONDUCTOR CLUSTERS IN THE SOL-GEL PROCESS - QUANTIZED AGGREGATION, GELATION, AND CRYSTAL-GROWTH IN CONCENTRATED ZNO COLLOIDS [J].

SPANHEL, L ;

ANDERSON, MA .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1991, 113 (08) :2826-2833