Results 81 to 90 of about 41,858 (234)

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, G. S. Kanda, M. V. Yakushev, E. E. Abdel-Hady, D. J. Keeble   +4 more
doaj   +1 more source

Potential for biomedical applications of Positron Annihilation Lifetime Spectroscopy (PALS)

, 2018
Positron Annihilation Lifetime Spectroscopy (PALS) allows examining structure of materials in nano and sub-nanometer scale. This technique is based on the lifetime and intensity of ortho-positronium atoms in free volumes of given structures. It is mostly
Kubicz, Ewelina
core   +1 more source

Interactions Between Active Matters and Endogenous Fields

Advanced Materials, Volume 37, Issue 45, November 13, 2025.
This review synthesizes endogenous field information and computational methods in contexts such as cancer, wounds, and biofilms. It organizes NAMs and AAMs by sensing, transmitting, and executing functions, compares their limitations, and from these contrasts proposes design strategies for next‐generation AAMs, offering perspectives to foster ...
Jinwei Lin, Qiaoxin Guan, Jiangqi Feng, Shuqin Chen, Leilei Xu, Jianguo Guan, Samuel Sánchez   +6 more
wiley   +1 more source

Defect Engineering in Semiconductor Photocatalysts: Enhancing Photocatalytic Activity for Green Energy Production

Advanced Energy and Sustainability Research, Volume 6, Issue 11, November 2025.
By creating anion and cation vacancies, scientists fine‐tune semiconductor bandgaps and extend light absorption, boosting charge separation in photocatalysts. Surface defects enhance reactant adsorption and carrier transport, while controlled bulk defects curb recombination.
Srinath Ranjan Tripathy, Saroj Sundar Baral   +1 more
wiley   +1 more source

A spectroscopy approach to measure the gravitational mass of antihydrogen

, 2013
We study a method to induce resonant transitions between antihydrogen ($\bar{H}$) quantum states above a material surface in the gravitational field of the Earth.
Dalkarov, O. D., Debu, P., Dufour, G., Froelich, P., Kupriyanova, E. A., Lambrecht, A., Nesvizhevsky, V. V., Reynaud, S., Voronin, A. Yu.   +8 more
core   +3 more sources

Unleashing the Potential of Defect Engineered Persistent Pr3+‐Activated Phosphors for Multi‐Dimensional Anti‐Counterfeiting and X‐Ray Imaging Applications

Small, Volume 21, Issue 46, November 20, 2025.
Enhanced multicolor persistent luminescence with optimized trap depths (≈0.73 eV) in Ca3Ga2Ge3O12:Pr3+ phosphors enable advanced anti‐counterfeiting, optical storage, and high‐resolution X‐ray imaging (4 lp mm−1), surpassing commercial screens.
Annu Balhara, Santosh K. Gupta, Partha Sarathi Ghosh, Malini Abraham, Mohit Tyagi, Ashok Kumar Yadav, Subrata Das, Kathi Sudarshan, P. S. Sarkar   +8 more
wiley   +1 more source

Investigation of Surface Oxidation of Cast Austenitic 304 Stainless Steel at High Temperatures

Metals
The microstructure and surface behavior of iron-based 304 stainless steel after temperature exposure was studied by Mössbauer spectroscopy, powder X-ray diffraction, scanning electron microscopy, energy dispersive analysis and positron annihilation.
Tatiana Ivanova, Michal Kořenek, Miroslav Mashlan, Martin Fryšák   +3 more
doaj   +1 more source

Searching for annihilation radiation from SN 1006 with SPI on INTEGRAL [PDF]

, 2006
Historical Type Ia supernovae are a leading candidate for the source of positrons observed through their diffuse annihilation emission in the Galaxy.
E. Kalemci, Milne D. K., P. A. Milne, S. E. Boggs, S. P. Reynolds   +4 more
core   +2 more sources

The Reduction of Group 6–8 Transition Metal Oxides with Hydrogen—From Ore Smelting to Reaction Pathways#

European Journal of Inorganic Chemistry, Volume 28, Issue 30, October 22, 2025.
As the reduction of transition metal oxides by coal poses a significant climate risk, the use of alternative reducing agents such as hydrogen is becoming increasingly important. This review summarizes the current knowledge of the reduction pathways of transition metal oxides from groups 6 to 8.
Michael Häger, Simon Keilholz, Holger Kohlmann   +2 more
wiley   +1 more source

Sequential ion irradiations on Fe-Cr and ODS Fe-Cr alloys

Nuclear Materials and Energy, 2020
Oxide dispersion strengthened steels are candidate materials for nuclear reactor applications due to a powerful combination of properties, such as reduced activation, high-temperature strength and increased creep resistance.
M. Šćepanović, T. Leguey, I. García-Cortés, F.J. Sánchez, C. Hugenschmidt, M.A. Auger, V. de Castro   +6 more
doaj   +1 more source