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Publikācija: Photoluminescence and Surface Photovoltage Spectroscopy Studies of Hydroxyapatite Nano-Bio-Ceramics

Publication Type Scientific article indexed in SCOPUS or WOS database
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Photoluminescence and Surface Photovoltage Spectroscopy Studies of Hydroxyapatite Nano-Bio-Ceramics
Field of research 1. Natural sciences
Sub-field of research 1.4 Chemical sciences
Authors Daniel Aronov
Marina Chaikina
Jehuda Haddad
Anatoly Karlov
Gundars Mežinskis
Leonid Oster
Ilona Pavlovska
Gil Rosenman
Keywords Hydroxyapatite; Photoluminescence; Photovoltage spectroscopy
Abstract Photoluminescence (PL) and surface photovoltage spectroscopy applied to nanostructural bioceramics hydroxyapatite (HAp) allowed to study electron (hole) energy states spectra of HAP and distinguish bulk and surface localized levels. Studied PL excitation spectra allowed obtaining an exact value of the energy band gap in HAP: Eg=3.95 eV.This result is consistent with Eg value determined by the contact potential difference (ΔCPD) curves treatment method as Eg=3.94 eV. Comparison between ΔCPD and PL spectra indicates that the energy spectra of electron – hole levels studied by two different experimental spectroscopy techniques are very similar. This comparison enables to conclude that all HAp samples have identical electron – hole states structures consisting of five bulk states and one surface state. It is assumed that the deep electron (hole) charged states may be responsible for high bioactivity of the HAp nanoceramics.
DOI: 10.1016/j.jlumin.2006.01
Hyperlink: http://www.sciencedirect.com/science/article/pii/S0022231306003358 
Reference Aronov, D., Chaikina, M., Haddad, J., Karlov, A., Mežinskis, G., Oster, L., Pavlovska, I., Rosenman, G. Photoluminescence and Surface Photovoltage Spectroscopy Studies of Hydroxyapatite Nano-Bio-Ceramics. Journal of Luminescence, 2007, Vol.122-123, pp.936-938. ISSN 0022-2313. Available from: doi:10.1016/j.jlumin.2006.01
Additional information Citation count:
  • Scopus  0
ID 3559