RT Journal Article
T1 Study of structure and luminescence of CdSe Nanocrystals obtained by ball milling
A1 Urbieta Quiroga, Ana Irene
A1 Fernández Sánchez, Paloma
A1 Piqueras de Noriega, Javier
AB 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.
PB American Institute of Physics
SN 0021-8979
YR 2004
FD 2004-08-20
LK https://hdl.handle.net/20.500.14352/51143
UL https://hdl.handle.net/20.500.14352/51143
LA eng
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NO © 2004 American Institute of Physics.This work has been supported by MCYT (Project No. MAT2003-00455).
NO MCYT
DS Docta Complutense
RD 15 may 2024