Reversible emission enhancement for Ce3+-doped silica nanoparticles dispersed within pores of mesoporous silica

被引：26

作者：

Bi, HJ ^{[1
]}

Cai, WP ^{[1
]}

Zhang, LD ^{[1
]}

机构：

[1] Acad Sinica, Inst Solid State Phys, Hefei 230031, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2000年 / 35卷 / 09期

关键词：

composites; chemical synthesis; luminescence; optical properties;

D O I：

10.1016/S0025-5408(00)00350-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ce3+-doped silica nanoparticles dispersed within pores of mesoporous silica were synthesized by soaking and sol-gel technique. Liquid-like absorption and fluorescence have been observed. What is important is that the emission intensity increases with the exposure time to humid air and reaches saturation (which is about four times of the original value) at about 5 h. Subsequent drying leads to a decrease of the emission intensity to the original value. Reversible emission enhancement is obtained by alternately exposing and drying the sample. This is attributed to the formation of Ce3+ ion aqueous solution within pores of the sample during its exposure to air, due to the nonparticipation of Ce3+ ions in the silica network. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1495 / 1501

页数：7

共 18 条

[1] Improvement of the emission properties of sol-gel silica matrices containing Eu3+ in the presence of poly(ethylene glycol)-200 [J].

Bekiari, V ;

Pistolis, G ;

Lianos, P .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1998, 226 (1-2) :200-203

[2] INVESTIGATION OF SOME CE3+-ACTIVATED PHOSPHORS [J].

BLASSE, G ;

BRIL, A .

JOURNAL OF CHEMICAL PHYSICS, 1967, 47 (12) :5139-&

[3]

BRAY KL, 1994, J NONCRYST SOLIDS, V170, P143

[4] Semiconducting optical properties of silver/silica mesoporous composite [J].

Cai, WP ;

Zhang, Y ;

Jia, JH ;

Zhang, LD .

APPLIED PHYSICS LETTERS, 1998, 73 (19) :2709-2711

[5]

Cai WP, 1997, J PHYS-CONDENS MAT, V9, P7257, DOI 10.1088/0953-8984/9/34/015

[6] ULTRAVIOLET SOLID-STATE CE-YLF LASER AT 325 NM [J].

EHRLICH, DJ ;

MOULTON, PF ;

OSGOOD, RM .

OPTICS LETTERS, 1979, 4 (06) :184-186

[7]

HONG H, 1984, LUMIN DISPLAY DEVICE, V5, P84

[8] DIFFUSION AND OPTICAL-PROPERTIES OF ND-DOPED SOL-GEL SILICA GLASSES [J].

KOONE, ND ;

ZERDA, TW .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1995, 183 (03) :243-251

[9] SPECTROSCOPIC CHARACTERIZATION OF DOPED SOL-GEL SILICA-GELS AND GLASSES - EVIDENCE OF INNER-SPHERE COMPLEXATION OF EUROPIUM(III) [J].

LOCHHEAD, MJ ;

BRAY, KL .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1994, 170 (02) :143-154

[10] CONTROL OF PORE-SIZE DISTRIBUTION OF SILICA-GEL THROUGH SOL-GEL PROCESS USING INORGANIC SALTS AND SURFACTANTS AS ADDITIVES [J].

MURAKATA, T ;

SATO, S ;

OHGAWARA, T ;

WATANABE, T ;

SUZUKI, T .

JOURNAL OF MATERIALS SCIENCE, 1992, 27 (06) :1567-1574

← 1 2 →