Results 81 to 90 of about 3,313,131 (376)

GEM Operation in Negative Ion Drift Gas Mixtures

, 2003
The first operation of GEM gas gain elements in negative ion gas mixtures is reported. Gains up to several thousand were obtained from single-stage GEMs in carbon disulfide vapor at low pressure, and in mixtures of carbon disulfide with Argon and Helium,
A Schreiner, C.J Martoff, Crane, G Bonvincini, Giomataris, I Shipsey, J Miyamoto, M Katz-Hyman, Martoff, Ohnuki, Pack, R Ayad, Rice-Evans, Sauli, Sauli, Snowden-Ifft   +15 more
core   +1 more source

Ferroelectric Quantum Dots for Retinomorphic In‐Sensor Computing

Advanced Materials, EarlyView.
This work has provided a protocol for fabricating retinomorphic phototransistors by integrating ferroelectric ligands with quantum dots. The resulting device combines ferroelectricity, optical responsiveness, and low‐power operation to enable adaptive signal amplification and high recognition accuracy under low‐light conditions, while supporting ...
Tingyu Long, Huanyu Zhou, Jaewan Ko, Hongwei Tan, Jaemin Lim, Yanfei Zhao, Daehan Kang, Eojin Yoon, Gyeong‐Tak Go, Somin Kim, Seung‐Woo Lee, Chan‐Yul Park, Hyojun Choi, Hyeran Kim, Hyung Joong Yun, Sung Hyuk Park, Kwan Sik Park, Jeong Woo Park, Mungeun Kim, Yong Soo Cho, Ho Won Jang, Wenqiang Yang, Min Hyuk Park, Wan Ki Bae, Sebastiaan van Dijken, Joona Bang, Tae‐Woo Lee   +26 more
wiley   +1 more source

Resource potential and extraction technique design for helium in coal measures

Meitian dizhi yu kantan
Back groundHelium is an important strategic scarce resource. Presently, helium used in industry originates primarily from natural gas. In contrast, helium in coal measures, generally emerging as coalbed methane (CBM) with a high helium content, serves as
Lei WANG, Maoyin TANG
doaj   +1 more source

Revealing How Acid Sites Enhance the Electrocatalytic Glycerol Oxidation Performance on Pt Loaded Zeolite‐Carbon Composite Materials

Advanced Materials, EarlyView.
In the work reported herein, the catalytic effects of acid sites on electrocatalytic glycerol oxidation reaction are investigated by using a novel catalytic material system that integrates Pt metal sites with acidic Al sites. Abstract The catalytic role and function of acid sites in solid acid catalysts, such as zeolites, are well understood in the ...
Ju Ye Kim, Sunjae No, Jinwoo Hwang, Mi Yoo, Hakju Lee, Youngbi Kim, Youngmin Kim, Yong Tae Kim, Jeong‐Chul Kim, Jeong Woo Han, Kyoungsoo Kim, Hyung Ju Kim   +11 more
wiley   +1 more source

Nusselt number correlation for turbulent heat transfer of helium–xenon gas mixtures [PDF]

, 2021
Biao Zhou, Yu Ji, Jun Sun, Yuliang Sun
openalex   +1 more source

Solvent‐Free Thermal Defect Engineering in Molecular Frameworks With Volatile Linkers

Advanced Materials, EarlyView.
Thermal removal of neutral volatile linkers enables precise and solvent‐free generation of metal vacancies in MOFs. This strategy affords redox‐stable, coordinatively unsaturated FeII sites with tunable spin, ligand coordination, and catalytic behavior. The approach offers a general route to design defect‐functional materials through local coordination
Sonia Martínez‐Giménez, Alejandro Orellana‐Silla, Marta Galbiati, Efrén Navarro‐Moratalla, Luca Braglia, Sara Stolfi, José Antonio Real, Víctor Rubio‐Giménez, Sergio Tatay, Carlos Martí‐Gastaldo   +9 more
wiley   +1 more source

Explanation of 100-fold reduction of spectral shifts for hydrogen on helium films

, 2008
We show that helium film-mediated hydrogen-hydrogen interactions account for a two orders of magnitude discrepancy between previous theory and recent experiments on cold collision shifts in spin-polarized hydrogen adsorbed on a helium film.
Erich J. Mueller, Kaden R. A. Hazzard, L. D. Landau   +2 more
core   +1 more source

Dielectric Properties of Cryogenic Gas Mixtures Containing Helium, Neon, and Hydrogen

, 2015
Past efforts of cooling high temperature superconducting (HTS) power cables by gaseous cryogens focused exclusively on helium. The limited dielectric strength of helium gas necessitated alternatives that could be used in the temperature range suitable ...
L. Graber, W. Kim, P. Cheetham, C. H. Kim, H. Rodrigo, S. Pamidi   +5 more
semanticscholar   +1 more source

Tuning Amorphous‐Crystalline Catalytic Interfaces by Mechanochemistry: Cu‐Based Metallic Glasses Coupled with Ceria for CO Oxidation

Advanced Materials, EarlyView.
Ball‐milling Cu‐based metallic glasses with ceria creates a unique nanostructure where metallic glass particles are wrapped by CeO2 nanoparticles. The intimate integration triggers copper state reorganization during reaction and aging, boosting CO oxidation and COPrOx activity.
Maahin Mirzay‐Shahim, Mehran Nabahat, Laia Pascua‐Solé, Isabel Serrano, Ilaria Lucentini, Xènia Garcia, Marina Armengol‐Profitós, Asier Agrelo‐Lestón, Ignasi Burgués‐Ceballos, Núria J. Divins, Ignacio J. Villar‐Garcia, Virginia Pérez‐Dieste, Carlos Escudero, Carlo Marini, Jordi Llorca, Eloi Pineda, Pere Bruna, Lluís Soler   +17 more
wiley   +1 more source

Noble gas isotopic characteristics and helium dilution of coalbed methane from the third coal seam in southern Qinshui Basin [PDF]

Youqicang pingjia yu kaifa
Helium is a crucial strategic resource with very limited reserves, but its enrichment and dilution mechanisms in gas reservoirs remain unclear. Noble gas isotopes play an important role in characterizing the interactions between gas and groundwater.
XU Dan, ZHANG Cong, JIA Huimin, LI Yuhong, QIN Shengfei, ZHANG Wen, ZHOU Junlin, MA Shangwei, FAN Yan
doaj   +1 more source