Effect of oxygen nonstoichiometry on the formation of luminescence centers in cerium dioxide nanocrystals

  • P. O. Maksimchuk Institute for Scintillation Materials, NAS of Ukraine
  • O. G. Viagin Institute for Scintillation Materials, NAS of Ukraine
  • I. I. Bespalova Institute for Scintillation Materials, NAS of Ukraine
  • A. A. Masalov Institute for Scintillation Materials, NAS of Ukraine
  • N. Ya. Spivak D.K. Zabolotny Institute of Microbiology and Virology of the NAS of Ukraine
  • Yu. V. Malyukin Institute for Scintillation Materials, NAS of Ukraine
Keywords: cerium dioxide nanocrystals, oxygen nonstoichiometry, oxygen vacancies, Ce4 - O 2- charge transfer complex, Ce3 luminescence center

Abstract

Use of nanocrystalline CeO2 for biomedical applications seems very perspective. Oxygen nonstoichiometry defines basic biomedical properties of cerium oxide — the ability to participate in redox processes taking place in the organism. CeO2 nanocrystals with different degrees of oxygen nonstoichiometry have been investigated by means of luminescence spectroscopy techniques. It has been shown that depending on the content of oxygen vacancies in the nanocrystals two different types of optical centers are formed. Luminescence of these centers can be ascribed to different electronic transitions of cerium ions. The first type of centers is Ce4+ - O2- charge transfer complex, while the second one is Ce3+ ions. Luminescent characteristics of different optical centers have been investigated.

 

 

 

 

 

 

 

 

 

 

 

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Author Biographies

P. O. Maksimchuk, Institute for Scintillation Materials, NAS of Ukraine

60 Lenin ave., 61001 Kharkov, Ukraine

O. G. Viagin, Institute for Scintillation Materials, NAS of Ukraine

60 Lenin ave., 61001 Kharkov, Ukraine

I. I. Bespalova, Institute for Scintillation Materials, NAS of Ukraine

60 Lenin ave., 61001 Kharkov, Ukraine

A. A. Masalov, Institute for Scintillation Materials, NAS of Ukraine

60 Lenin ave., 61001 Kharkov, Ukraine

N. Ya. Spivak, D.K. Zabolotny Institute of Microbiology and Virology of the NAS of Ukraine

154 Acad. Zabolotny str., Kyiv , 03680, Ukraine

Yu. V. Malyukin, Institute for Scintillation Materials, NAS of Ukraine

60 Lenin ave., 61001 Kharkov, Ukraine

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Cited
How to Cite
Maksimchuk, P. O., Viagin, O. G., Bespalova, I. I., Masalov, A. A., Spivak, N. Y., & Malyukin, Y. V. (1). Effect of oxygen nonstoichiometry on the formation of luminescence centers in cerium dioxide nanocrystals. Biophysical Bulletin, 1(28). Retrieved from https://periodicals.karazin.ua/biophysvisnyk/article/view/2505
Section
Methods of biophysical investigations