Oxygen vacancies represented by F and F2 centers were detected in faceted Al2O3 nanoparticles with the size less than 10 nm by a photoluminescence method. Al2O3 nanoparticles with such intrinsic defects were synthesized by evaporation of α-Al2O3 in flowing helium using a continuous wave CO2 laser. The XRD analysis showed that the crystal structure of Al2O3 nanoparticles is represented mostly by the low-temperature γ- and/or η-Al2O3 phases. The luminescence maxima of F and F2 centers in the Al2O3 nanoparticles were found to be 3.07 and 2.47 eV. These values are close to the luminescence maxima of F and F2 centers in bulk α-Al2O3.

Язык оригиналаанглийский
Страницы (с-по)757-763
Число страниц7
ЖурналOptical Materials
СостояниеОпубликовано - 1 янв 2018

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    Kostyukov, A. I., Zhuzhgov, A. V., Kaichev, V. V., Rastorguev, A. A., Snytnikov, V. N., & Snytnikov, V. N. (2018). Photoluminescence of oxygen vacancies in nanostructured Al2O3. Optical Materials, 75, 757-763. https://doi.org/10.1016/j.optmat.2017.11.040