RT Journal Article
T1 Cathodoluminescence of electron irradiated opal-based nanocomposites
A1 Díaz-Guerra Viejo, Carlos
A1 Piqueras De Noriega, Francisco Javier
A1 Golubev, VG.
A1 Kurdyukov, D.A.
A1 Pevtsov, A. B.
AB Synthetic opals infilled with silicon (opal-Si) and with Si and Pt (opal-Pt-Si) have been irradiated in a scanning electron microscope under high excitation conditions. Electron irradiation-induced changes in the morphology and luminescent defect structure of both types of nanocomposites were assessed by scanning electron microscopy and by cathodoluminescence (CL) microscopy and spectroscopy. Irradiation causes strong morphological changes in the ordered structure of the matrix and quenching of the nanocrystals-related CL emission in the opal-Si samples. On the contrary, such effects are not observed in the opal-Pt-Si nanocomposites. In both types of samples, electron irradiation induces the appearance of a CL band centered at 2.95 eV, attributed to complex centers involving oxygen vacancies in the silica spheres forming the matrix.
PB American Institute of Physics
SN 0021-8979
YR 2001
FD 2001-10-01
LK https://hdl.handle.net/20.500.14352/59121
UL https://hdl.handle.net/20.500.14352/59121
LA eng
NO © 2001 American Institute of Physics.This work was supported by MCYT (Project No. MAT2000-2119) and the Russian R&D program ‘‘Nanostructures’’(Grant No. 97-2016).
NO MCYT
NO Russian R&D program ‘‘Nanostructures’’
DS Docta Complutense
RD 18 abr 2025