Results 61 to 70 of about 1,771,729 (203)
Positron annihilation technique in hydrogen storage materials [PDF]
, 2021 The feasibility of using the positron annihilation methods is discussed. Two main methods of electron positron annihilation - positron annihilation lifetime spectroscopy and coincidence Doppler broadening are used to characterize the materials - hydrogen
Medic, Zarko
core
Positron annihilation lifetime spectroscopy: When is it feasible to decompose the spectrum?
Journal of Applied Physics, 2021 Positron annihilation lifetime spectroscopy (PALS) has the potential to determine open volume defect identities and concentrations only if the spectrum can be accurately decomposed into its constituent parts. The intrinsic difficulty of decomposing PALS spectra into their constituent lifetimes and intensities is demonstrated, and it is shown that the ...
J. V. Logan +4 more
openaire +2 more sources
Photophysics of Distinguished Defect States in Bi2O2Se Thin Films
Nanophotonics, Volume 15, Issue 17, 11 September 2026.An experimental comparison of CVD‐grown Bi2O2Se thin film and films prepared by OTG solution method with similar electrical properties reveals the defects mechanisms in Bi2O2Se thin films via OTG solution method, offering defect engineering strategies for high‐power electronics.
Xiaoran Niu +11 more
wiley +1 more source
Surface areas by positron annihilation spectroscopy [PDF]
, 1985 Positron annihilation spectroscopy (PAS) is a technique for measuring the length of time that a positron exists after being injected into a specific material. Lifetime measurements have been used for studying defects in metals. These imperfections affect
Dale, J.M. +5 more
core
FlexMat, Volume 3, Issue 3, Page 428-451, September 2026.Addressing the challenges inherent in dry reforming of methane (DRM), this paper focuses on the structural design and performance optimization of Ni‐based catalysts. The modulation strategies for DRM are systematically reviewed across four dimensions: the micromorphology of active metals, metal‐support interactions, electronic modifications by ...
Bowei Cao, Junlei Zhang, Wanglei Wang
wiley +1 more source
C, 2019 Graphene oxide (GO) is conveniently prepared from expandable graphite using a simplified Hummers’ method. The product is thoroughly characterized by usual techniques (UV-vis, Fourier-transform infrared (FTIR) and Raman spectroscopies, zeta ...
Guido Panzarasa +4 more
doaj +1 more source
Polymer Testing, 2022 Poly(lactic acid)/polyamide11 (PLA/PA11) blends were prepared by reactive blending with multifunctional epoxy oligomer as compatibilizer, and the compatibility of PLA and PA11 was improved.
Xipo Zhao +6 more
doaj +1 more source
Journal of Food Science, Volume 91, Issue 9, September 2026.ABSTRACT Seafood is highly susceptible to rapid microbial proliferation, lipid oxidation, and volatile spoilage compound accumulation, resulting in rapid quality deterioration and food waste. Metal‐organic frameworks (MOFs), a class of crystalline coordination materials with tunable porosity, high surface area, and diverse metal‐ligand architectures ...
Abhishek Bisht +3 more
wiley +1 more source
Технологія та конструювання в електронній апаратурі, 2006 Nanoporous spinel‑type MgAl2O4 ceramics sintered at 1100 and 1400 °C, considered as promising materials for humidity sensors, were investigated using positron annihilation lifetime spectroscopy (PALS). It is demonstrated that PALS can be applied to study
H. I. Klym +5 more
doaj
Positron Annihilation Lifetime Spectroscopy in the study of defects in materials
HNPS Proceedings, 2019 The Positron Annihilation Lifetime Spectroscopy (PALS) is a valuable method for the study of the open volume defects in materials. The reduced electron density at the vacant/defect site increases the positron lifetime, and positron lifetime increases as the size of defect increases. In the current paper the experimental apparatus for the measurement of
K. Triantou +2 more
openaire +2 more sources