Results 91 to 100 of about 41,858 (234)

Defects in Inorganic Mechanoluminescent Phosphors: Insights and Impacts

Advanced Functional Materials, Volume 35, Issue 40, October 1, 2025.
Mechanoluminescence is attracting more attention recently, and defect dominates mechanoluminescence performances. Investigating how defects work in the mechanoluminescence process is crucial for elucidating its complex luminescence mechanism. This review aims to emphasize the fundamental role of defects in mechanoluminescence, which offers an ...
Wenhao Li, Sheng Wu, Jing Ren, Puxian Xiong   +3 more
wiley   +1 more source

On the positron annihilation spectroscopy and tensile behavior of COOH-MWCNT/epoxy nanocomposites [PDF]

Journal of Particle Science and Technology
Positron Annihilation Lifetime Spectroscopy (PALS) is sensitive to the material voids/free volume on the atomic scale. For this reason, this method has been used as a unique technology to measure the free volume and structural defects in polymers in ...
Mohammad Koohkan, Ali Akbar Mehmandoost Khajeh-Dad, Hamed Khosravi   +2 more
doaj   +1 more source

Positron annihilation induced Auger electron spectroscopy [PDF]

Recently, Weiss et al. have demonstrated that it is possible to excite Auger transitions by annihilating core electrons using a low energy (less than 30eV) beam of positrons.
Jensen, K. O., Koymen, A. R., Lee, K. H., Lei, Chun, Mehl, David, Weiss, Alex   +5 more
core   +1 more source

Nuclear-Astrophysics Lessons from INTEGRAL

, 2013
Measurements of high-energy photons from cosmic sources of nuclear radiation through ESA's INTEGRAL mission have advanced our knowledge: New data with high spectral resolution showed that characteristic gamma-ray lines from radioactive decays occur ...
Diehl, Roland
core   +1 more source

Robust and Reversible Supramolecular Adhesive via Dynamic Covalent Bond Crosslinking‐Induced Assembly of Metal‐Coordinated Nanoparticles

Advanced Science, Volume 12, Issue 39, October 20, 2025.
A supramolecular polymer network is constructed through the assembly of metal‐coordinated nanoparticles induced by the crosslinking of dynamic covalent disulfide bond. The resulting supramolecular adhesive exhibited excellent adhesion performance, including strong adhesion strength, exceptional solvent resistance, and distinct reversible adhesion ...
Yanyan Guo, Mengran Zhang, Shuanggen Wu, Xunqiu Wang   +3 more
wiley   +1 more source

Synthesis, characterization, and sensitivity tests of La0.8Ba0.1Bi0.1FeO3 nanoparticles towards a few parts-per-billion of acetone gas

Heliyon
In the present paper, the La0.8Ba0.1Bi0.1FeO3 powders were synthesized via the auto-combustion method. The optical, the positron annihilation spectroscopy and the gas sensing properties of our sample were investigated simultaneously.
E.M. Benali, L. Saher, A. Benali, M. Bejar, E. Dhahri, Jiangtao Wu, Lin Peng, P.M. Gordo, J. Pina, B.F.O. Costa   +9 more
doaj   +1 more source

Superlong‐Range Magnetic Coupling and Ferromagnetic Spin Freezing in Mechanoluminescent Semiconductor Eu:SrAl2O4

Advanced Science, Volume 12, Issue 38, October 13, 2025.
Eu:SrAl2O4 emit visible light even upon finger contact. This mechanoluminescent material is an optimal platform for bound magnetic polarons to produce unexpected ferromagnetism, with the magnetic spins of Eu2+ sparsely distributed in the crystal lattice.
Xu‐Guang Zheng, Ichihiro Yamauchi, Tomasz Galica, Eiji Nishibori, Tatsuya Kawae, Jumpei G. Nakamura, Akihiro Koda, Chao‐Nan Xu   +7 more
wiley   +1 more source

Studies of stainless steel exposed to sandblasting

Nukleonika, 2015
The influence of sandblasting on surface and subsurface of stainless steel is investigated using variable energy positron beam (VEP), positron annihilation spectroscopy (PAS), scanning electron microscopy (SEM), and atomic force microscopy (AFM). Samples
Horodek Paweł, Eseev Marat K., Kobets Andrey G.   +2 more
doaj   +1 more source

Positron annihilation spectroscopy with magnetically analyzed beams [PDF]

Lifetime measurements with magnetically analyzed positron beams were made in condensed media with uniform and non-uniform properties. As expected, the lifetime values with magnetically analyzed positron beams in uniform targets are similar to those ...
Holt, W. H., Mock, W., Jr., Singh, J. J.
core   +1 more source

Proposed parameter-free model for interpreting the measured positron annihilation spectra of materials using a generalized gradient approximation

, 2015
Positron annihilation spectroscopy is often used to analyze the local electronic structure of materials of technological interest. Reliable theoretical tools are crucial to interpret the measured spectra.
Barbiellini, Bernardo, Kuriplach, Jan
core   +1 more source