Results 11 to 20 of about 2,402,463 (266)

The near-room-temperature upsurge of electrical resistivity in Lu-H-N is not superconductivity, but a metal-to-poor-conductor transition

open access: yesMatter and Radiation at Extremes, 2023
The recent report of superconductivity in nitrogen-doped lutetium hydride (Lu-H-N) at 294 K and 1 GPa brought hope for long-sought-after ambient-condition superconductors.
Di Peng   +5 more
doaj   +1 more source

Hexagonal B–C–N composite consisting of h-BN and graphite separated by B–C nanolayer [PDF]

open access: yesMatter and Radiation at Extremes
Graphite and hexagonal boron nitride (h-BN), despite their structural similarity, exhibit opposing electronic properties, namely, metallic conductivity and wide-bandgap insulation, respectively.
Baoyin Xu   +12 more
doaj   +1 more source

Enhancing reversibility of LiNi0.5Mn1.5O4 by regulating surface oxygen deficiency

open access: yesCarbon Energy, 2023
Oxygen deficiency has crucial effects on the crystal structure and electrochemical performance of spinel oxide lithium electrode materials such as LiNi0.5Mn1.5O4 (LNMO) cathode.
Dandan Wang   +8 more
doaj   +1 more source

Some Magnetic Properties and Magnetocaloric Effects in the High-Temperature Antiferromagnet YbCoC2

open access: yesMagnetochemistry, 2023
The YbCoC2 compound, which crystallizes in a base-centered orthorhombic unit cell in the Amm2 space group CeNiC2 structure, is unique among Yb-based compounds due to the highest magnetic ordering temperature of TN=27 K.
Denis Alexandrovich Salamatin   +7 more
doaj   +1 more source

Phase transition mechanism and bandgap engineering of Sb2S3 at gigapascal pressures

open access: yesCommunications Chemistry, 2021
Antimonite (Sb2S3) has potential applications for solar energy, but how its layered structure changes under pressure is incompletely understood. Here diamond anvil cell experiments supported by first principles calculations offer a structural explanation
Zhongxun Cui   +9 more
doaj   +1 more source

Room-Temperature Synthesis of Tubular Hexagonal Boron Nitride under Pressure

open access: yesCrystals, 2023
Hexagonal boron nitride (h-BN) exhibits interesting optical and mechanical properties, including chemical and thermal stability. Extensive techniques have been applied for the realization of h-BN at high temperatures.
Junkai Li   +4 more
doaj   +1 more source

Pressure calibrations of high-pressure large-volume presses at HPSTAR [PDF]

open access: yesMatter and Radiation at Extremes
Large-volume presses (LVPs) are widely utilized in diverse research fields—including high-pressure physics, chemistry, materials science, and Earth and planetary sciences—to investigate the physical and chemical properties of materials under extreme high-
Yongjiang Xu   +38 more
doaj   +1 more source

Everything you always wanted to know about metallic hydrogen but were afraid to ask

open access: yesMatter and Radiation at Extremes, 2020
The hydrogen molecule is made from the first and lightest element in the periodic table. When hydrogen gas is either compressed or cooled, it forms the simplest molecular solid. This solid exhibits many interesting and fundamental physical phenomena.
Eugene Gregoryanz   +5 more
doaj   +1 more source

Pressure-Induced Polymerization: Addition and Condensation Reactions

open access: yesMolecules, 2021
Under pressure of 1–100 GPa, unsaturated organic molecules tend to form covalent bond to each other for a negative enthalpy change, which often produces polymeric materials with extended carbon skeleton.
Fang Li   +4 more
doaj   +1 more source

Exploring Preferences for a Digital Single‐Session Intervention for Adolescent Siblings of Youth With Cancer

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Adolescent siblings of children with cancer are at elevated risk for psychosocial problems. Unfortunately, various barriers such as limited family time and resources, conflicting schedules, and psychosocial staffing constraints at cancer centers hinder sibling access to support.
Christina M. Amaro   +10 more
wiley   +1 more source

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