Synthesis and size control of luminescent ZnSe nanocrystals by a microemulsion-gas contacting technique

被引:74
作者
Karanikolos, GN
Alexandridis, P
Itskos, G
Petrou, A
Mountziaris, TJ [1 ]
机构
[1] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA
[2] SUNY Buffalo, Dept Phys, Buffalo, NY 14260 USA
[3] Natl Sci Fdn, Arlington, VA 22230 USA
关键词
D O I
10.1021/la035397+
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A scalable method for controlled synthesis of luminescent compound semiconductor nanocrystals (quantum dots) using microemulsion-gas contacting at room temperature is reported. The technique exploits the dispersed phase of a microemulsion to form numerous identical nanoreactors. ZnSe quantum dots were synthesized by reacting hydrogen selenide gas with diethylzinc dissolved in the heptane nanodroplets of a microemulsion formed by self-assembly of a poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) amphiphilic block copolymer in formamide. A single nanocrystal is grown in each nanodroplet, thus allowing good control of particle size by manipulation of the initial diethylzinc concentration in the heptane. The ZnSe nanocrystals exhibit size-dependent luminescence and excellent photostability.
引用
收藏
页码:550 / 553
页数:4
相关论文
共 31 条
[1]   Micellization of polyoxyalkylene block copolymers in formamide [J].
Alexandridis, P ;
Yang, L .
MACROMOLECULES, 2000, 33 (09) :3382-3391
[2]  
Alexandridis P., 2000, AMPHIPHILIC BLOCK CO
[3]   Semiconductor clusters, nanocrystals, and quantum dots [J].
Alivisatos, AP .
SCIENCE, 1996, 271 (5251) :933-937
[4]   HIGHER EXCITED ELECTRONIC STATES IN CLUSTERS OF ZNSE, CDSE, AND ZNS - SPIN-ORBIT, VIBRONIC, AND RELAXATION PHENOMENA [J].
CHESTNOY, N ;
HULL, R ;
BRUS, LE .
JOURNAL OF CHEMICAL PHYSICS, 1986, 85 (04) :2237-2242
[5]   THE DEFINITION OF MICRO-EMULSION [J].
DANIELSSON, I ;
LINDMAN, B .
COLLOIDS AND SURFACES, 1981, 3 (04) :391-392
[6]  
Empedocles SA, 1999, ADV MATER, V11, P1243, DOI 10.1002/(SICI)1521-4095(199910)11:15<1243::AID-ADMA1243>3.0.CO
[7]  
2-2
[8]   Bright UV-blue luminescent colloidal ZnSe nanocrystals [J].
Hines, MA ;
Guyot-Sionnest, P .
JOURNAL OF PHYSICAL CHEMISTRY B, 1998, 102 (19) :3655-3657
[9]   Highly luminescent silicon nanocrystals with discrete optical transitions [J].
Holmes, JD ;
Ziegler, KJ ;
Doty, RC ;
Pell, LE ;
Johnston, KP ;
Korgel, BA .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (16) :3743-3748
[10]  
Huynh WU, 1999, ADV MATER, V11, P923, DOI 10.1002/(SICI)1521-4095(199908)11:11<923::AID-ADMA923>3.0.CO