2026-06-08T04:37:52Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/591212024-09-06T18:32:50Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Díaz-Guerra Viejo, Carlos
author
Piqueras De Noriega, Francisco Javier
author
Golubev, VG.
author
Kurdyukov, D.A.
author
Pevtsov, A. B.
2023-06-20T19:01:22Z
2023-06-20T19:01:22Z
2001-10-01
0021-8979
https://hdl.handle.net/20.500.14352/59121
http://dx.doi.org/10.1063/1.1390307
http://scitation.aip.org
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.
eng
Cathodoluminescence of electron irradiated opal-based nanocomposites
journal article
URL
https://docta.ucm.es/bitstreams/fcba580c-7876-4131-9b28-8de9f3b04fa0/download
File
MD5
91e1542e2c3ead8aba12dbc3b0408f83
427488
application/pdf
PiquerasJ150libre.pdf
URL
https://docta.ucm.es/bitstreams/d76ae662-1a14-47cb-8769-77e406751256/download
File
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4ceeea87962e750157e1d72eb59f713c
18039
text/plain
PiquerasJ150libre.pdf.txt