Results 71 to 80 of about 82,759 (298)

Experimental and theoretical study of oxygen vacancy induced La-doped mesoporous TiO2 for enhanced thermal stability

open access: yesAIP Advances, 2023
We report a facile synthesis of mesoporous TiO2 with a large specific surface area and rich oxygen vacancies using La-doped TiO2 through high-temperature annealing. Such integration of a unique mesoporous structure and oxygen vacancies provides effective
Kamaljeet Singh   +3 more
doaj   +1 more source

Harnessing Fungal Biowelding for Constructing Mycelium‐Engineered Materials

open access: yesAdvanced Engineering Materials, EarlyView.
Mycelium‐bound composites (MBCs) offer low‐carbon alternatives for construction, yet interfacial bonding remains a critical challenge. This review examines fungal biowelding as a biocompatible adhesive, elucidating mycelium‐mediated interfacial mechanisms and their role in material assembly. Strategies to optimize biowelding are discussed, highlighting
Xue Brenda Bai   +2 more
wiley   +1 more source

Atomic and electronic structure of YFeO3 surface with oxygen vacancies

open access: yesSt. Petersburg Polytechnical University Journal: Physics and Mathematics, 2022
The atomic and electronic structure of YFeO3 surfaces at the formation of oxygen vacancies are investigated by the methods of quantum-mechanical calculations. The (100), (001), and (010) surfaces are considered.
Gnidenko Anton, Chigrin Pavel
doaj   +1 more source

Conversion of neutral nitrogen-vacancy centers to negatively-charged nitrogen-vacancy centers through selective oxidation

open access: yes, 2010
The conversion of neutral nitrogen-vacancy centers to negatively charged nitrogen-vacancy centers is demonstrated for centers created by ion implantation and annealing in high-purity diamond.
Barclay, P. E.   +3 more
core   +1 more source

Low valence cation doping of bulk Cr2O3: Charge compensation and oxygen vacancy formation [PDF]

open access: yes, 2016
The different oxidation states of chromium allow its bulk oxide form to be reducible, facilitating the oxygen vacancy formation process, which is a key property in applications such as catalysis. Similar to other useful oxides such as TiO2, and CeO2, the
Carey, John J.   +2 more
core   +1 more source

Laser Powder Bed Fusion of Copper–Tungsten Composites for Heat Sink Applications in High‐Power Electronics

open access: yesAdvanced Engineering Materials, EarlyView.
This article demonstrates the successful qualification of a copper–tungsten composite for laser powder bed fusion. The resulting components exhibited high density, high thermal conductivity, and reduced thermal expansion. Heat sinks with complex geometries were successfully manufactured, clearly showcasing the material's potential for additive ...
Simon Rauh   +6 more
wiley   +1 more source

First-principles study of the morphology and surface structure of LaCoO3 and La0.5Sr0.5Fe0.5Co0.5O3 perovskites as air electrodes for solid oxide fuel cells

open access: yesScience and Technology of Advanced Materials: Methods, 2021
The slow kinetics of the oxygen exchange reaction at the surface of air electrodes for solid oxide fuel cells must be improved to reduce their operating temperature.
Masanobu Nakayama   +6 more
doaj   +1 more source

Giant photoinduced lattice distortion in oxygen-vacancy ordered SrCoO2.5 thin films

open access: yes, 2018
Despite of the tremendous efforts spent on the oxygen vacancy migration in determining the property optimization of oxygen-vacancy enrichment transition metal oxides, few has focused on their dynamic behaviors non-equilibrium states.
Bousquet, Eric   +11 more
core   +1 more source

First principles study of intrinsic point defects in hexagonal barium titanate [PDF]

open access: yes, 2012
Density functional theory (DFT) calculations have been used to study the nature of intrinsic defects in the hexagonal polymorph of barium titanate. Defect formation energies are derived for multiple charge states and due consideration is given to finite ...
Allnatt A. R.   +8 more
core   +2 more sources

Duplex Stainless Steel Laser‐Surface Textured: Stability in Brine Solution

open access: yesAdvanced Engineering Materials, EarlyView.
Controlled laser‐surface treatment (LST) of duplex DSS2205 steel is performed to increase its stability in brine solution under cyclic electrochemical assays. The superior protection with respect to flat and smooth panels is attributed to the presence of FeCr2O4 as the main protective oxide layer in the LST surface, after corrosion tests. The stability
Mohammad Rezayat   +5 more
wiley   +1 more source

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