Effect of oxygen nonstoichiometry on the formation of luminescence centers in cerium dioxide nanocrystals
Keywords:
cerium dioxide nanocrystals, oxygen nonstoichiometry, oxygen vacancies, Ce4 - O 2- charge transfer complex, Ce3 luminescence centerAbstract
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.
Downloads
Downloads
Issue
Section
License
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
