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Journal of Applied Physics / Volume 96 / Issue 4 / NANOSCALE SCIENCE AND DESIGN

J. Appl. Phys. 96, 2210 (2004); http://dx.doi.org/10.1063/1.1765858 (4 pages)

Study of structure and luminescence of CdSe Nanocrystals obtained by ball milling

A. Urbieta, P. Fernández, and J. Piqueras

Departamento de Física de Materiales, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, 28040 Madrid, Spain

(Received 15 March 2004)

The effect of mechanical milling on the structure and luminescent properties of CdSe powder has been investigated by means of cathodoluminescence (CL) in the scanning electron microscope, transmission electron microscopy (TEM) and x-ray diffraction. The starting powders were ball milled for times between 5 and 20h. TEM of the milled samples reveals the presence of nanocrystals with a wide range of sizes including nanocrystals of 10 nm and smaller. The CL spectra of the untreated samples show the characteristic band edge emission centered at 1.8 eV. In the milled samples a band centered at about 2.5 eV is observed which appears to be associated to the presence of nanocrystals. The evolution of defect structure with milling time has been monitored by recording infrared cathodoluminescence spectra. A partial phase transformation from wurtzite to zinc blende structure also has been observed.

© 2004 American Institute of Physics

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KEYWORDS and PACS

Keywords

cadmium compounds, II-VI semiconductors, nanostructured materials, powders, ball milling, surface topography, cathodoluminescence, scanning electron microscopy, transmission electron microscopy, X-ray diffraction

PACS

  • 81.07.Bc

    Nanocrystalline materials

  • 61.46.-w

    Structure of nanoscale materials

  • 68.35.B-

    Structure of clean surfaces (and surface reconstruction)

  • 78.60.Hk

    Cathodoluminescence, ionoluminescence

  • 81.20.Wk

    Machining, milling

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.1765858

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    R. Tenne, R. Jäger-Waldau, M. Lux-Steiner, E. Bucher, J. Rioux, and C. Levy-Clement, Phys. Rev. B 42, 1763 (1990).

    J. Rodríguez-Viejo, K. F. Jensen, H. Mattoussi, J. Michel, B. O. Dabbousi, and M. G. Bawendi, Appl. Phys. Lett. 70, 2132 (1997)APPLAB000070000016002132000001.

    S. Borini, B. Méndez, and J. Piqueras, J. Appl. Phys. 94, 7729 (2003)JAPIAU000094000012007729000001.

    C. B. Norris, J. Appl. Phys. 53, 5177 (1982)JAPIAU000053000007005177000001.


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