Articles producció científica> Química Física i Inorgànica

Photoluminescence behavior of surface radiation induced color centers in lithium fluoride and influence of nanosized clusters

  • Datos identificativos

    Identificador: imarina:9293204
    Autores:
    Voitovich, A. P.Loiko, P. A.Mateos, X.Runets, L. P.Serres, J. M.Stupak, A. P.
    Resumen:
    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.
  • Otros:

    Autor según el artículo: Voitovich, A. P.; Loiko, P. A.; Mateos, X.; Runets, L. P.; Serres, J. M.; Stupak, A. P.;
    Departamento: Química Física i Inorgànica
    Autor/es de la URV: Mateos Ferré, Xavier / Serres Serres, Josep Maria
    Palabras clave: Subsurface color center Photoluminescence Nanosized cluster Luminescence Lithium fluoride nanocrystals Lif Defects Annealing
    Resumen: 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.
    Áreas temáticas: 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
    Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
    Direcció de correo del autor: josepmaria.serres@urv.cat xavier.mateos@urv.cat
    Identificador del autor: 0000-0002-4299-538X 0000-0003-1940-1990
    Fecha de alta del registro: 2024-09-07
    Versión del articulo depositado: info:eu-repo/semantics/acceptedVersion
    Enlace a la fuente original: https://www.sciencedirect.com/science/article/abs/pii/S0022231316312674
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referencia al articulo segun fuente origial: Journal Of Luminescence. 188 75-80
    Referencia de l'ítem segons les normes 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
    DOI del artículo: 10.1016/j.jlumin.2017.04.007
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2017
    Tipo de publicación: Journal Publications
  • Palabras clave:

    Atomic and Molecular Physics, and Optics,Biochemistry,Biophysics,Chemistry (Miscellaneous),Condensed Matter Physics,Optics
    Subsurface color center
    Photoluminescence
    Nanosized cluster
    Luminescence
    Lithium fluoride nanocrystals
    Lif
    Defects
    Annealing
    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
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