Results 11 to 20 of about 48,017 (305)
Oxygen Vacancies in Perovskite Oxide Piezoelectrics [PDF]
Materials, 2020 The excellent electro-mechanical properties of perovskite oxide ferroelectrics make these materials major piezoelectrics. Oxygen vacancies are believed to easily form, migrate, and strongly affect ferroelectric behavior and, consequently, the piezoelectric performance of these materials and devices based thereon.
Tyunina, Marina +2 more
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Anisotropic chemical expansion due to oxygen vacancies in perovskite films [PDF]
Scientific Reports, 2021 In scientifically intriguing and technologically important multifunctional ABO3 perovskite oxides, oxygen vacancies are most common defects. They cause lattice expansion and can alter the key functional properties.
M. Tyunina +3 more
doaj +2 more sources
Femtosecond visualization of oxygen vacancies in metal oxides [PDF]
Science Advances, 2020 Femtosecond spectroscopy combined with first-principle calculations enables determination of oxygen-vacancy configuration.
Zhang, Xinping +7 more
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Diffusion and aggregation of oxygen vacancies in amorphous silica [PDF]
Journal of Physics: Condensed Matter, 2017 Using density functional theory (DFT) calculations, we investigated oxygen vacancy diffusion and aggregation in relation to dielectric breakdown in amorphous silicon dioxide (a-SiO2). Our calculations indicate the existence of favourable sites for the formation of vacancy dimers and trimers in the amorphous network with maximum binding energies of ...
Munde, MS, Gao, DZ, Shluger, AL
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Facet-dependent stability of near-surface oxygen vacancies and excess charge localization at CeO2surfaces [PDF]
, 2021 To study the dependence of the relative stability of surface (V A) and subsurface (VB) oxygen vacancies with the crystal facet of CeO2, the reduced (100), (110) and (111) surfaces, with two different concentrations of vacancies, were investigated by ...
Lustemberg, Pablo German +5 more
core +1 more source
, 2021 We report the fabrication of highly ordered Nb2O5 nanochannel film (Nb2O5-NCF) onto niobium foil by an anodization method. After thermal treatment, the obtained Nb2O5-NCF with rich oxygen vacancies exhibits electrochemical N2 reduction reaction (NRR ...
Wang, G +4 more
core +1 more source
Orienting Oxygen Vacancies for Fast Catalytic Reaction [PDF]
Advanced Materials, 2013 Catalysis is indispensable to chemical processes and relevant to many aspects of modern life. Owing to the intriguing electronic structures and good ionic properties, multivalent transition metal oxides have attracted attention as key catalysts for various energy and environmental applications.
Jeen, Hyoungjeen +6 more
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Mechanisms of Oxygen Vacancy Aggregation in SiO2 and HfO2
Frontiers in Physics, 2019 Dielectric oxide films in electronic devices undergo significant structural changes during device operation under bias. These changes are usually attributed to aggregation of oxygen vacancies resulting in formation of oxygen depleted regions and ...
David Z. Gao +6 more
doaj +1 more source
Materials Research Express, 2020 The strontium titanate (SrTiO _3 ) single crystals with different orientations of (100), (110) and (111) were investigated using thermally stimulated depolarization current (TSDC) measurements, which has been proved to be an effective strategy to ...
Haimo Qu +3 more
doaj +1 more source
Molecules, 2023 Cerium dioxide (CeO2) was pretreated with reduction and reoxidation under different conditions in order to elucidate the role of surface Ce4+ and oxygen vacancies in the catalytic activity for direct synthesis of dimethyl carbonate (DMC) from CO2 and ...
Guoqiang Zhang +6 more
doaj +1 more source