CdTe/CdS core shell quantum dots for photonic applications

被引:28
作者
de Menezes, FD
Brasil, AG
Moreira, WL
Barbosa, LC
Cesar, CL
Ferreira, RD
de Farias, PMA
Santos, BS [1 ]
机构
[1] Univ Fed Pernambuco, Dept Quim Fundamental, BR-50670901 Recife, PE, Brazil
[2] Univ Fed Pernambuco, Dept Ciencias Farmaceut, BR-50670901 Recife, PE, Brazil
[3] Univ Fed Pernambuco, Dept Biofis & Radiobiol, BR-50670901 Recife, PE, Brazil
[4] Univ Estadual Campinas, Dept Elect Quant, BR-13083970 Campinas, SP, Brazil
关键词
quantum dots; CdTe; luminescence;
D O I
10.1016/j.mejo.2005.04.005
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this work, we show a simple experimental procedure to obtain CdTe/CdS (diameter=3-7 nm) core shell nanocrystals in colloidal suspension. The nanocrystals were characterized by transmission electronic microscopy and powder X-ray diffraction analysis. The optical properties were determined by electronic absorption, excitation and emission spectroscopies and are discussed in terms of chemical changes that occur at the surface of the particles. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:989 / 991
页数:3
相关论文
共 11 条
  • [1] Perspectives on the physical chemistry of semiconductor nanocrystals
    Alivisatos, AP
    [J]. JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (31) : 13226 - 13239
  • [2] Relations between the photoluminescence efficiency of CdTe nanocrystals and their surface properties revealed by synchrotron XPS
    Borchert, H
    Talapin, DV
    Gaponik, N
    McGinley, C
    Adam, S
    Lobo, A
    Möller, T
    Weller, H
    [J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (36) : 9662 - 9668
  • [3] QUANTUM CRYSTALLITES AND NONLINEAR OPTICS
    BRUS, L
    [J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1991, 53 (06): : 465 - 474
  • [4] Theoretical metastability of semiconductor crystallites in high-pressure phases, with application to beta-tin structure silicon
    Brus, LE
    Harkless, JAW
    Stillinger, FH
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1996, 118 (20) : 4834 - 4838
  • [5] Quantum dots, efficient fluorescent markers for red cells.
    Castro, V
    Farias, PMA
    Santos, BS
    Menezes, FD
    Ferreira, RC
    Lima, PRM
    Fontes, A
    Barias-Castro, ML
    Cesar, CL
    [J]. BLOOD, 2004, 104 (11) : 741A - 741A
  • [6] Lateral patterning of CdTe nanocrystal films by the electric field directed layer-by-layer assembly method
    Gao, MY
    Sun, JQ
    Dulkeith, E
    Gaponik, N
    Lemmer, U
    Feldmann, J
    [J]. LANGMUIR, 2002, 18 (10) : 4098 - 4102
  • [7] MOREIRA WL, 2005, P SOC PHOTO-OPT INS, V5704, P36
  • [8] II-VI semiconductors made by soft chemistry - Syntheses and optical properties
    Pileni, MP
    [J]. CATALYSIS TODAY, 2000, 58 (2-3) : 151 - 166
  • [9] The contribution of particle core and surface to strain, disorder and vibrations in thiolcapped CdTe nanocrystals
    Rockenberger, J
    Tröger, L
    Rogach, AL
    Tischer, M
    Grundmann, M
    Eychmüller, A
    Weller, H
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1998, 108 (18) : 7807 - 7815
  • [10] High efficiency carrier multiplication in PbSe nanocrystals: Implications for solar energy conversion
    Schaller, RD
    Klimov, VI
    [J]. PHYSICAL REVIEW LETTERS, 2004, 92 (18) : 186601 - 1