Browsing by Author "Brînzari, Vladimir"
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Item Carbon 1s photoemission line analysis of C-based adsorbate on (111)In2O3 surface: The influence of reducing and oxidizing conditions [Articol](Elsevier, 2016) Brînzari, Vladimir; Cho, B.K.; Korotcenkov, GhenadiiSynchrotron radiation photoemission study of C 1s line of (111) In2O3 surface was carried out under HV (high vacuum) doses of oxygen, carbon monoxide and water. Gas interaction with the surface was activated by heating of In2O3 monocrystalline film at temperatures of 160 or 250 °C. The study of complex structure of C 1 s line and evolution of its fine components allowed to establish their nature and to propose possible surface adsorbed species and reactions, including a direct chemisorption and dissociation of CO molecules. Reduction or oxidation of the surface determines whether the first (chemisorption) or the second (dissociation) process takes place. The latter is responsible for additional formation of ionosorbed oxygen. Both processes have not been previously reported for In2O3 and for conductive metal oxides.Item Nanocomposite structure changes in Zno-In2o3 (Zio) system prepared by spray pyrolysis method [Articol](CEP USM, 2022-11-10) Brînzari, Vladimir; Boris, Iulia; Ivanov, MihailItem Plasma treatment and surface sensibilization of tin dioxide films for enhancement of gas sensitivity [Articol](2005) Brînzari, Vladimir; Dmitriev, Serghei; Korotcenkov, GhenadiiThis paper presents result of investigation aimed at the improvement of gas sensitive properties of SnO2 thin film gas sensors (TFGS) by means of high frequency (HF) oxygen plasma treatment and its surface doping. Used in experiments SnO2 films were deposited by spray pyrolysis method. It is shown that plasma treatment provides 3-4 times growth of thin film gas sensitivity. Surface doping of SnO2 films with Pd leads to gas sensitivity increasing by order. It is conluded that combination of HF oxygen plasma treatment and surface sensibilization through surface doping is an effective way to considerable improvement of gas sensitive properties of tin dioxide based TFGS.Item Rattling-induced suppression of phonon transport in In2O3 with Sn and Ga [Articol](CEP USM, 2022-11-10) Cocemasov, Alexandr; Brînzari, Vladimir; Nika, DenisItem Theoretical bases of the operation of nanoscale semiconducting gas sensors on the example of tin dioxide [Articol](CEP USM, 2019) Brînzari, Vladimir; Korotcenkov, Ghenadii; Damaschin, Ion