Results 71 to 80 of about 1,771,729 (203)

Positively Charged Polymer‐Brush MOFs for Large‐Area, Pressure‐Resistant Gas Separation Membranes

Advanced Materials, Volume 38, Issue 43, 3 August 2026.
A universal POPA strategy enables positively charged polymer‐brush MOFs with self‐adaptive interfacial interlocking to resist aggregation under fast processing. This design ensures seamless dispersion within large‐area selective layers, achieving 1 m‐wide roll‐to‐roll fabrication of pressure‐resistant MMCMs with tunable CO2 separation performance ...
Yi Yang, Ye Yuan, Yuxiu Sun, Fei Shi, Chenyang Song, Weifan Wang, Qinghua Li, Menglong Sheng, Zhihua Qiao, Jingwei Hou, Anthony K. Cheetham, Zhi Wang   +11 more
wiley   +1 more source

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, Zhenbang Dai, Xingzhong Cao, Peng Zhang, Chen Lin, Zihang Huang, Ruian Zhang, Yi Fu, Xuanyu Jiang, He Tian, Jingjing Xue, Kaifeng Wu, Junhui Wang, Tianqi Deng, Andrew M. Rappe, Gaorong Han, Zhaohui Ren   +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

Positron Annihilation Lifetime Measurements in Collagen Biopolymer

, 1998
Lifetime measurement in Positron Annihilation Spectroscopy (PAS) is applied to the study of free-volume collagen characteristics as a function of concentration. The lifetimes of positrons were obtained by a conventional fast-fast coincidence system.
S. Siles, G. Moya, P. Moser, J. Kansy, X.H. Li   +4 more
core   +1 more source

Determination of positron annihilation lifetime spectroscopy instrument timing resolution function and source terms using standard samples [PDF]

, 2019
The extraction of material positron lifetime components from positron annihilation lifetime spectroscopy measurements, performed using conventional unmoderated radionuclide positron sources, requires accurate knowledge of both the spectrometer instrument
Keeble, D. J., Russell, H., Morton, A.
core   +1 more source

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

Positron annihilation lifetime spectroscopy source correction determination:A simulation study

, 2016
Positron annihilation lifetime spectroscopy (PALS) can provide sensitive detection and identification of vacancy-related point defects in materials. These measurements are normally performed using a positron source supported, and enclosed by, a thin foil.
Kanda, Gurmeet S., Keeble, David J.
core   +1 more source

Ortho-positronium lifetime for soft-tissue classification

Scientific Reports
The objective of this work is to showcase the ortho-positronium lifetime as a probe for soft-tissue characterization. We employed positron annihilation lifetime spectroscopy to experimentally measure the three components of the positron annihilation ...
Ashish V. Avachat, Kholod H. Mahmoud, Anthony G. Leja, Jiajie J. Xu, Mark A. Anastasio, Mayandi Sivaguru, Angela Di Fulvio   +6 more
doaj   +1 more source

Principles of positron porosimetry

Nukleonika, 2015
The paper deals with positron porosimetry (PP), which is based on positron annihilation lifetime spectroscopy (PALS). The numerical analysis of positron lifetime spectra for PP is more demanding than in most of other applications of PALS.
Zaleski Radosław
doaj   +1 more source

Physicochemical Studies of Fluorescent Dyes Doped in Polymer Sheet and Its Application in Solar Energy: Effect of Gamma Irradiation on Charge-Transfer Complex of 1,8-naphthalimide Derivative with Chloranilic Acid

International Journal of Electrochemical Science, 2014
Charge-transfer complex formed from the reaction of 2-(4-isobutoxyphenyl)-6-hydrazino-1,8- naphthalimide dye with chloranilic acid (CLA) has been studied in methanol at room temperature.
M.S. Al-Amoudi, H.E. Hassan, M.M. AL-Majthoub, T. Sharshar, Moamen S. Refat   +4 more
doaj   +1 more source