Crystalline superlattices from single-sized quantum dots

被引:103
作者
Zheng, NF
Bu, XH
Lu, HW
Zhang, QC
Feng, PY [1 ]
机构
[1] Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA
[2] Calif State Univ Long Beach, Dept Chem & Biochem, Long Beach, CA 90840 USA
关键词
D O I
10.1021/ja053588o
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Despite the recent progress toward the synthesis of monodisperse semiconducting nanocrystals, it remains a challenge to prepare quantum dot structures with a precise number of atoms. Here, we report synthesis, crystal structure, and optical properties of a family of cadmium sulfide nanocrystal superlattices assembled through single-sized semiconducting clusters. Clusters of various sizes have been made. The largest cluster determined from single-crystal analysis has a total of 138 metal-chalcogen sites. It is the largest known single-sized II-VI quantum dot and is also the first one with more than 100 metal-chalcogen sites. X-ray powder diffraction (XRD) and optical absorption studies indicate the presence of even larger single-sized quantum dots (>200 metal-chalcogen sites). These clusters consist of cubic zinc blende-type core and hexagonal wurtzite-type corners and can exist in up to five isomeric forms that differ only in the position of the hexagonal-cubic interface. Copyright © 2005 American Chemical Society.
引用
收藏
页码:11963 / 11965
页数:3
相关论文
共 19 条
[1]   Perspectives on the physical chemistry of semiconductor nanocrystals [J].
Alivisatos, AP .
JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (31) :13226-13239
[2]   Synthesis and structure of the nanoclusters [Hg32Se14(SePh)(36)], [Cd32Se14(SePh)(36-)(PPh(3))(4)], [P(Et)(2)(Ph)C(4)H(8)OSiMe(3)](5-)[Cd18I17(PSiMe(3))(12)], and [N(Et)(3)C(4)H(8)OSiMe(3)](5)[Cd18I17(PSiMe(3))(12)] [J].
Behrens, S ;
Bettenhausen, M ;
Deveson, AC ;
Eichhofer, A ;
Fenske, D ;
Lohde, A ;
Woggon, U .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1996, 35 (19) :2215-2218
[3]   On the formation of framework indium sulfides [J].
Cahill, CL ;
Parise, JB .
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 2000, (09) :1475-1482
[4]   BIOSYNTHESIS OF CADMIUM-SULFIDE QUANTUM SEMICONDUCTOR CRYSTALLITES [J].
DAMERON, CT ;
REESE, RN ;
MEHRA, RK ;
KORTAN, AR ;
CARROLL, PJ ;
STEIGERWALD, ML ;
BRUS, LE ;
WINGE, DR .
NATURE, 1989, 338 (6216) :596-597
[5]   METAL CHALCOGENIDE CLUSTER CHEMISTRY [J].
DANCE, I ;
FISHER, K .
PROGRESS IN INORGANIC CHEMISTRY, VOL 41, 1994, 41 :637-803
[6]   OPEN FRAMEWORK STRUCTURES BASED ON SEX2- FRAGMENTS - SYNTHESIS OF (PH4P)[M(SE6)2] (M = GA, IN, TL) IN MOLTEN (PH4P)2SEX [J].
DHINGRA, S ;
KANATZIDIS, MG .
SCIENCE, 1992, 258 (5089) :1769-1772
[7]   Semiconductor nanocrystal assemblies:: Experimental pitfalls and a simple model of particle-particle interaction [J].
Döllefeld, H ;
Weller, H ;
Eychmuller, A .
JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (22) :5604-5608
[8]   The interface chemistry between chalcogenide clusters and open framework chalcogenides [J].
Feng, PY ;
Bu, XH ;
Zheng, NF .
ACCOUNTS OF CHEMICAL RESEARCH, 2005, 38 (04) :293-303
[9]   CRYSTAL-STRUCTURE AND OPTICAL-PROPERTIES OF CD32S14(SC6H5)36.DMF4, A CLUSTER WITH A 15-ANGSTROM CDS CORE [J].
HERRON, N ;
CALABRESE, JC ;
FARNETH, WE ;
WANG, Y .
SCIENCE, 1993, 259 (5100) :1426-1428
[10]   TRANSITION-METAL THIOLATES - FROM MOLECULAR FRAGMENTS OF SULFIDIC SOLIDS TO MODELS FOR ACTIVE-CENTERS IN BIOMOLECULES [J].
KREBS, B ;
HENKEL, G .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 1991, 30 (07) :769-788