Results 51 to 60 of about 1,787,488 (253)

Ultrathin Amphipathic Dual‐Polymer Networks: Unlocking Hyper‐Permeable CO2 Capture via Solvent‐Mediated Poly(Ethylene Oxide) Amorphization

Advanced Functional Materials, EarlyView.
Hydrophilic PEO‐copolymers and hydrophobic PDMS are physically integrated via a compatibilizing solvent into an amphipathic dual‐polymer network with versatile interfacial affinity and completely amorphized PEO segments for hyper‐permeable CO2 transport.
Ji Wu, Fan Feng, Baiwang Zhao, Jordan Yuan Zhe Ng, Kaiyu Wang, Can Zeng Liang, Guangtai Zheng, Boxuan Zhao, Tai‐Shung Chung, Sui Zhang   +9 more
wiley   +1 more source

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

Inverse change in positron lifetimes of vacancies in tungsten by binding of interstitial impurity atoms to a vacancy: A first-principles study

Nuclear Materials and Energy, 2023
First-principles calculations related to defect complexes formed from a monovacancy and multiple interstitial impurity atoms (hydrogen, carbon, nitrogen, and oxygen atoms) in tungsten were performed.
Atsushi Yabuuchi
doaj   +1 more source

Beyond Nanoporosity: A CO2‐Conditioned Glassy Matrix Contributes to the Brittle‐to‐Ductile Transition of Nanocellular Polyetherimide

Advanced Materials, EarlyView.
The mechanical performance of nanocellular polyetherimide cannot be explained by nanoporosity alone. It is shown that CO2 saturation and desorption leave a distinct mechanical signature in the glassy matrix before foaming. This matrix contribution provides a new route to understand and optimize the brittle to ductile transition in nanocellular polymers.
Félix Lizalde‐Arroyo, Frederik Van Loock, Victoria Bernardo, Tuuli Peltola, René Bes, Alberto Tena, Miguel Ángel Rodríguez‐Pérez, Judith Martín‐de León   +7 more
wiley   +1 more source

Materials analysis using positron beam lifetime spectroscopy [PDF]

, 1998
We are using a defect analysis capabilities based on two positron beam lifetime spectrometers: the first is based on a 3 MeV electrostatic accelerator and the second on our high current linac beam.
Sterne, P., Stoeffl, W., Hartley, J., Howell, R. H., Asoka-Kumar, P.   +3 more
core  

Free-Volume Studies in Polycaprolactone/Poly(propylene oxide) Urethane/Urea Membranes by Positron Lifetime Spectroscopy [PDF]

, 2008
Positron annihilation lifetime spectroscopy was used to study the free volume parameters in polypropylene oxide-based tri-isocyanate terminated prepolymer/polycaprolactone diol bi-soft urethane/urea membranes (PU/PCL) with PCL content from 5 up to 25 wt%.
de Lima, A., Ferreira Marques, M., Queiroz, D., Norberta de Pinho, M., Major, P., Kajcsos, Zs., Gordo, P.   +6 more
core   +1 more source

Microstructure and luminescent properties of Eu3+-activated MgGa2O4:Mn2+ ceramic phosphors

Journal of Advanced Ceramics, 2020
Mn2+ and the trivalent europium (Eu3+)-doped MgGa2O4 ceramics are characterized using a multi-experimental approach. The formation of spinel-structured ceramics is ascertained from X-ray diffraction (XRD) analysis.
A. Luchechko, Y. Shpotyuk, O. Kravets, O. Zaremba, K. Szmuc, J. Cebulski, A. Ingram, R. Golovchak, O. Shpotyuk   +8 more
doaj   +1 more source

Ion Concentration and Voltage Imaging With Fluorescent Nanodiamonds

Advanced Materials, EarlyView.
We demonstrate reversible switching between the fluorescent NV0 and the dark NV+ state, in sub‐30 nm FNDs via surface oxidation and hydrogenation, respectively. In an electrochemical cell, we show that the fluorescence from hydrogenated particles enables all‐optical imaging of voltages and ion concentrations at the micrometer scale.
Patrick Voorhoeve, Alessandro Mameli, Hiroshi Abe, Takeshi Ohshima, Qiang Sun, Anita Quigley, Rob Kapsa, Nikolai Dontschuk, Philipp Reineck   +8 more
wiley   +1 more source

DDRS4PALS: A software for the acquisition and simulation of lifetime spectra using the DRS4 evaluation board

SoftwareX, 2019
Lifetime techniques are applied to diverse fields of study including materials sciences, semiconductor physics, biology, molecular biophysics and photochemistry.Here we present DDRS4PALS, a software for the acquisition and simulation of lifetime spectra ...
Danny Petschke, Torsten E.M. Staab
doaj   +1 more source

Strong Coupling in Bulk Nanoplasmonic Nanoplatelet Perovskite Scintillators

Advanced Materials, EarlyView.
A bulk scintillating nanocomposite is engineered from CsPbBr3 nanoplatelets and Ag nanocubes to support exciton–plasmon strong coupling under X‐ray excitation. The resulting hybrid polaritonic states appear directly in radioluminescence, opening a route toward polariton‐enabled scintillator design beyond conventional Purcell enhancement.
Michal Makowski, Dominik Kowal, Anna Pniakowska, Kamil Misztal, Mohanad Saadeldin Eid, Joanna Cybinska, Winicjusz Drozdowski, Benoit Mahler, Christophe Dujardin, Detlef Hommel, Liang Jie Wong, Dennis Schaart, Sergio Brovelli, Muhammad Danang Birowosuto   +13 more
wiley   +1 more source