Results 51 to 60 of about 4,639 (219)

Comparison of the Coating Structure of Silicon‐Based PECVD Coatings With Varying Organic Content

Plasma Processes and Polymers, Volume 23, Issue 3, March 2026.
Silicon‐based PECVD coatings transition abruptly from organic SiOCH to oxidic SiOx at ~32 at% silicon, exhibiting threshold behavior in barrier performance. Chemical composition seems to dominate over porosity: SiOx coatings unexpectedly show higher porosity yet superior barrier properties, possibly due to rigid cage‐like molecular structures ...
Jonas Franke, Maciej Oskar Liedke, Andreas Schäfer, Maik Butterling, Ahmed Gamal Attallah, Eric Hirschmann, Andreas Wagner, Rainer Dahlmann   +7 more
wiley   +1 more source

Atomic and molecular structures of positronium, dipositronium and positronium hydride [PDF]

, 2011
The three positron based chemical entities, analogous to hydrogen atom, hydrogen molecule and hydride, are drawing increasing attention in the literature. While a lot is known about the binding energies, not much is known about the radii of the atoms and
Raji Heyrovska
core  

Flow Battery with Remarkably Stable Performance at High Current Density: Development of A Nonfluorinated Separator with Concurrent Rejection and Conductivity

Angewandte Chemie, Volume 137, Issue 25, June 17, 2025.
Organic redox flow batteries are promising for grid stabilisation, but the insufficient ion separation by membrane separator can limit the lifetime and increase the cost. Here, we present an ultra‐ion‐selective SPEEK‐SX membrane, it enables 600 cycles at 160 mA cm−2 with only 0.00935% per cycle capacity decay, outperforming Nafion‐212, offering a ...
Wanqiao Liang, Ehsan Ghasemiestahbanati, Nathan T. Eden, Durga Acharya, Cara M. Doherty, Mainak Majumder, Matthew R. Hill   +6 more
wiley   +2 more sources

Ion‐Selective Microporous Membranes via One‐Step Copolymerization Enable High‐Performance Redox Flow Batteries

Advanced Functional Materials, Volume 36, Issue 12, 9 February 2026.
A scalable one‐step copolymerization strategy is developed to produce low‐cost microporous ion exchange membranes that boost both the efficiency and lifespan of flow batteries. When combined with organic electrolytes in aqueous systems, these membranes enable safe and cheap flow battery energy storage, supporting the widespread integration of renewable
Jiaye Liu, Chunchun Ye, Ying Ma, Rui Tan, Xiangwen Wang, Huiting Zhang, Peng Song, Quan‐Fu An   +7 more
wiley   +1 more source

Can the mirror world explain the ortho-positronium lifetime puzzle? [PDF]

, 2000
We suggest that the discrepant lifetime measurements of ortho-positronium can be explained by ortho-positronium oscillations into mirror ortho-positronium.
Gninenko, Sergei N., S.N Gninenko, Foot, Robert, R Foot   +3 more
core   +1 more source

Studies of discrete symmetries in a purely leptonic system using the Jagiellonian Positron Emission Tomograph

EPJ Web of Conferences, 2016
Discrete symmetries such as parity (P), charge-conjugation (C) and time reversal (T) are of fundamental importance in physics and cosmology. Breaking of charge conjugation symmetry (C) and its combination with parity (CP) constitute necessary conditions ...
Moskal P., Alfs D., Bednarski T., Białas P., Curceanu C., Czerwiński E., Dulski K., Gajos A., Głowacz B., Gupta-Sharma N., Gorgol M., Hiesmayr B. C., Jasińska B., Kamińska D., Khreptak O., Korcyl G., Kowalski P., Krzemień W., Krawczyk N., Kubicz E., Mohammed M., Niedźwiecki Sz., Pawlik-Niedńwiecka M., Raczyński L., Rudy Z., Silarski M., Smyrski J., Wieczorek A., Wiślicki W., Zgardzińska B., Zieliński M.   +30 more
doaj   +1 more source

Cooling positronium to ultralow velocities with a chirped laser pulse train. [PDF]

Nature, 2023
When laser radiation is skilfully applied, atoms and molecules can be cooled allowing precise measurements and control of quantum systems. This is essential in fundamental studies of physics as well as practical applications such as precision ...
Shu K, Tajima Y, Uozumi R, Miyamoto N, Shiraishi S, Kobayashi T, Ishida A, Yamada K, Gladen RW, Namba T, Asai S, Wada K, Mochizuki I, Hyodo T, Ito K, Michishio K, O'Rourke BE, Oshima N, Yoshioka K.   +18 more
europepmc   +2 more sources

Effect of Dissolved Hydrogen on Polyamide 11: Observation During Hydrogen Desorption Process After Decompression at Atmospheric Pressure

Journal of Applied Polymer Science, Volume 143, Issue 3, January 15, 2026.
Dissolved hydrogen‐induced plasticization of polyamide 11 (PA11) detected as a decrease in flexural modulus (E f) using Cyclic Three‐Point Bending (Cyc‐3PB). ABSTRACT The effect of dissolved hydrogen on polyamide 11 (PA11) after decompression from a 90 MPa hydrogen gas environment was investigated. Structural analyses using wide‐angle X‐ray diffraction
Hiroaki Ono, Youhei Fujii, Shunsuke Nagano, Masahiro Kasai, Keiko Ohyama, Hirotada Fujiwara, Shin Nishimura   +6 more
wiley   +1 more source

Positronium emission from semiconductors

, 2021
Positronium is spontaneously emitted from solids, when the formation potential or the work function is negative. So far, positronium emission from solids have been investigated mainly with metals and insulators.
Atsumi, Miyashita, Atsuo, Kawasuso, Masaki, Maekawa, 石田, 明, 宮下, 敦巳, 999160, 999171, 河裾, 厚男, 999161, 999170, 999164, 長嶋, 泰之, 999165, 999162, 999163, 999168, 999169, 999166, 前川, 雅樹, 999167, 和田, 健   +20 more
core  

A Positronium Beam and Positronium Reflection from LiF [PDF]

, 1987
At the Brookhaven National Laboratory we have constructed a positronium (Ps) beam by transmitting monoenergetic, low energy positrons through a gas cell containing either Ar or He which provide an electron to form positronium. A description of the positron beam and of the Ps formation mechanisms are found in these Proceedings (see M. Weber, et al.
Weber, M., Berko, S., Brown, B. L., Canter, K. F., Lynn, K. G., Mills, A. P., Jr., Roellig, L. O., Tang, S., Viecas, A.   +8 more
openaire   +1 more source