Author, as appears in the article.: Voitovich, A. P.; Loiko, P. A.; Mateos, X.; Runets, L. P.; Serres, J. M.; Stupak, A. P.;
Department: Química Física i Inorgànica
URV's Author/s: Mateos Ferré, Xavier / Serres Serres, Josep Maria
Keywords: Subsurface color center Photoluminescence Nanosized cluster Luminescence Lithium fluoride nanocrystals Lif Defects Annealing
Abstract: Influence of pre-irradiation annealing temperature on the efficiency of the subsurface color center formation in gamma-irradiated lithium fluoride nanocrystals has been studied. Increase of the annealing temperature reduces the efficiency of formation of these centers. Nanocrystals lose their ability to form subsurface color centers after pre irradiation annealing at 623 K and higher temperatures. The formed subsurface color centers are partially transformed into the usual centers of the same composition during the post-radiation annealing at certain temperatures. It has been shown that the mechanical fragmentation of lithium fluoride crystals leads to the formation of nanosized clusters in their subsurface layer. Subsurface radiation color centers which are located near the clusters are subjected to the modified crystal field. This circumstance causes strong differences between the luminescent characteristics of subsurface color centers and usual centers of the same composition in the crystal bulk, where there are no clusters. The clusters are completely destroyed after annealing the samples at 623 K and higher temperatures. The obtained results indicate that the presence of nanoclusters is a prerequisite for the formation of subsurface radiation color centers with specific fluorescent properties. The thickness of the subsurface layer, where subsurface color centers can be formed, has been estimated.
Thematic Areas: Química Optics Odontología Medicina ii Medicina i Materiais Interdisciplinar General chemistry Farmacia Ensino Engenharias iv Engenharias iii Engenharias ii Condensed matter physics Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciência de alimentos Chemistry (miscellaneous) Chemistry (all) Biotecnología Biophysics Biochemistry Atomic and molecular physics, and optics Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: josepmaria.serres@urv.cat xavier.mateos@urv.cat
Author identifier: 0000-0002-4299-538X 0000-0003-1940-1990
Record's date: 2024-09-07
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://www.sciencedirect.com/science/article/abs/pii/S0022231316312674
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Journal Of Luminescence. 188 75-80
APA: Voitovich, A. P.; Loiko, P. A.; Mateos, X.; Runets, L. P.; Serres, J. M.; Stupak, A. P.; (2017). Photoluminescence behavior of surface radiation induced color centers in lithium fluoride and influence of nanosized clusters. Journal Of Luminescence, 188(), 75-80. DOI: 10.1016/j.jlumin.2017.04.007
Article's DOI: 10.1016/j.jlumin.2017.04.007
Entity: Universitat Rovira i Virgili
Journal publication year: 2017
Publication Type: Journal Publications