Gallium nitride quantum dots in a silica xerogel matrix

被引:10
作者
Murali, AK [1 ]
Leppert, VJ [1 ]
Risbud, SH [1 ]
机构
[1] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA
来源
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2000年 / 76卷 / 03期
基金
美国国家科学基金会;
关键词
oxidation; microstructure; xerogel;
D O I
10.1016/S0921-5107(00)00452-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Controlled oxidation of GaN powders was performed inside xerogel cavities with the objective of demonstrating formation of composites of GaN nanoparticles embedded in a silicate matrix. A 60% reduction in GaN particle size was observed due to the oxidation of bulk particles dispersed inside the xerogel. The microstructure and phase chemistry of the nano-GaN in xerogel composite were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). (C) 2000 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:206 / 210
页数:5
相关论文
共 10 条
[1]  
BILLY M, 1983, PROGR NITROGEN CERAM, P408
[2]   Size selected silicon particles in sol-gel glass by centrifugal processing [J].
Duval, DJ ;
McCoy, BJ ;
Risbud, SH ;
Munir, ZA .
JOURNAL OF APPLIED PHYSICS, 1998, 83 (04) :2301-2307
[3]  
FOSMOE A, 1992, CHEMICAL PROCESSING OF ADVANCED MATERIALS, P897
[4]   Synthesis of nanocrystalline gallium nitride in silica aerogels [J].
Goodwin, TJ ;
Leppert, VJ ;
Smith, CA ;
Risbud, SH ;
Niemeyer, M ;
Power, PP ;
Lee, HWH ;
Hrubesh, LW .
APPLIED PHYSICS LETTERS, 1996, 69 (21) :3230-3232
[5]   Observation of quantum confined excited states of GaN nanocrystals [J].
Leppert, VJ ;
Zhang, CJ ;
Lee, HWH ;
Kennedy, IM ;
Risbud, SH .
APPLIED PHYSICS LETTERS, 1998, 72 (23) :3035-3037
[6]   Growth of group III nitrides. A review of precursors and techniques [J].
Neumayer, DA ;
Ekerdt, JG .
CHEMISTRY OF MATERIALS, 1996, 8 (01) :9-25
[7]   OXYGEN DIFFUSION AND REACTION OF RESIDUAL CARBON IN SOL GEL-DERIVED SILICA XEROGEL [J].
ROBINSON, PA ;
PERLMUTTER, DD .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 1994, 169 (1-2) :183-199
[8]   DEPENDENCE OF OXIDATION RATE OF WC POWDER ON PARTICLE-SIZE [J].
ROEBUCK, B ;
BENNETT, EG ;
ALMOND, EA ;
GEE, MG .
JOURNAL OF MATERIALS SCIENCE, 1986, 21 (06) :2033-2042
[9]   OXIDATION-KINETICS OF ALUMINUM NITRIDE [J].
SURYANARAYANA, D .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1990, 73 (04) :1108-1110
[10]   Kinetic study of the oxidation of gallium nitride in dry air [J].
Wolter, SD ;
Mohney, SE ;
Venugopalan, H ;
Wickenden, AE ;
Koleske, DD .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1998, 145 (02) :629-632