Results 71 to 80 of about 1,414,987 (211)
Colossal Photovoltaic Current in Ferroelectric Oxide by Constructing Defect Band
Advanced Science, Volume 13, Issue 48, 28 August 2026.Colossal photovoltaic current density of 34.36 mA/cm2 under 375 nm illumination has been achieved in the Pb‐deficient PbTiO3 film. The ultraviolet photoresponsivity surpasses that of all reported ferroelectric materials. This enhancement is attributed to the junction effect between the Pb‐deficient and non‐defective layers.
Yiran Sun +16 more
wiley +1 more source
A study of some properties for substituted Li-ferrite using positron annihilation lifetime technique
Results in Physics, 2015 Positron annihilation lifetime spectroscopy (PALS) is used to investigate polycrystalline substituted Li-ferrite samples. The dray ceramic technique was used to prepare all investigated samples. The variation of positron annihilation parameters I1%, I2%,
E. Hassan Aly, A.M. Samy
doaj +1 more source
129Xe Nuclear Magnetic Resonance Spectroscopy of Metal–Organic Frameworks
Analysis &Sensing, Volume 6, Issue 4, July 2026.129Xe NMR spectroscopy is a powerful technique to study porous materials. Properties such as pore sizes, pore connectivity, and dynamic switching processes associated with adsorption can be investigated. With its inertness and highly polarizable electron cloud, Xe allows for sensitive monitoring of small changes in the surface chemistry of materials ...
Tobias Bode, Eike Brunner
wiley +1 more source
Positron annihilation lifetime spectroscopy study of roller burnished magnesium alloy
Nukleonika, 2015 The effect of roller burnishing on Vickers’ hardness and positron lifetimes in the AZ91HP magnesium alloy was studied. The microhardness increases with an increase in the burnishing force and with a decrease in the feed. The comparison of various methods
Zaleski Radosław +2 more
doaj +1 more source
Distribution of Positron Annihilation Lifetime Components
مجلة بغداد للعلوم, 2008 The intensities of the positron annihilation lifetime components are shown to be related to the free volume model, and the theoretical value of the ratio between the singlet to the triplet state intensities, described by the ratio η, is shown to follow ...
Ahmed Abdul-Razzaq Selman +1 more
doaj +1 more source
Small Methods, Volume 10, Issue 13, 8 July 2026.Differential phase contrast (DPC) imaging in STEM is demonstrated as a rapid, versatile segmentation tool for advanced aluminum alloys. Decomposition of false‐color DPC micrographs resolves nanoclusters, precipitate variants, dislocation strain fields, nanostructures, and grain boundaries ‐ all within a single and fast acquisition.
Matheus A. Tunes +7 more
wiley +1 more source
Study on the concentration and size of vacancy defect in W-K alloy
四川大学学报. 自然科学版, 2019 W-K alloy has many advantages, such as high melting point, the resistance to thermal shock, and excellent resistance to helium hydrogen plasma irradiation.
ZHANG Yuan-Yuan +3 more
doaj
Ion‐Pairing and Counterion Effects in Contemporary Photochemistry
Angewandte Chemie Novit, Volume 2, Issue 2, June 2026.Ion‐pairing and counterion effects have emerged as fundamental yet underexplored determinants of photochemical behavior. Far from inert, counterions, and Coulombic interactions modulate excited‐state dynamics, quenching efficiencies, emission, and catalytic pathways.
Matthias Schmitz, Christoph Kerzig
wiley +1 more source
Characterization of vacancy defects in Cu(In,Ga)Se2 by positron annihilation spectroscopy
AIP Advances, 2016 The photovoltaic performance of Cu(In1-x,Gax)Se2 (CIGS) materials is commonly assumed to be degraded by the presence of vacancy-related defects. However, experimental identification of specific vacancy defects remains challenging.
M. R. M. Elsharkawy +4 more
doaj +1 more source
Catalyst Deactivation Probed by Positron Annihilation Spectroscopy
, 2021 There is a widespread need to understand and improve the aging characteristics and properties of catalysts that support essential chemical reactions, including methanol-to-hydrocarbons (MTH) conversion.
Chase N. Taylor +11 more
core +1 more source