Results 181 to 190 of about 132,674 (264)

Ultrafast Coherent Phonon Dynamics in GeTe and GeSe: Contrasting Metavalent and Covalent Bonding

open access: yesSmall, Volume 22, Issue 63, 12 November 2026.
Ultrafast laser measurements reveal the differences in the optical response of atomic vibrations in GeTe and GeSe thin films. While crystalline GeTe exhibits strong, highly excitation‐sensitive coherent vibrations linked to metavalent bonding, covalently bonded GeSe shows weak or absent coherent phonons.
Timo Veslin   +6 more
wiley   +1 more source

High‐Temperature Studies on the Phases in the Ternary System K2O–CaO–SiO2: Heat Capacities and Reaction Pathways

open access: yesJournal of the American Ceramic Society, Volume 109, Issue 11, November 2026.
The thermochemistry of the K2O–CaO–SiO2 system, which is relevant for biomass combustion, has been explored. All nine crystalline potassium calcium silicates were synthesized to high purity, and their heat capacities were determined. Reaction pathways during compound formation were explored using in‐situ high‐temperature powder X‐ray diffraction ...
Hang Liu   +4 more
wiley   +1 more source

Chebyshev apodized fiber Bragg gratings. [PDF]

open access: yesSci Prog, 2021
Sun NH, Tsai MY, Liau JJ, Chiang JS.
europepmc   +1 more source

Tuning the Selectivity of Glycerol Electrooxidation via Catalyst Composition and Operating Conditions

open access: yesChemSusChem, Volume 19, Issue 20, 28 October 2026.
Temperature has a high impact on glycerol oxidation processes both in the macroscopic scale, increasing reaction rates and reducing cell potentials, and in the microscopic scale, affecting the reaction mechanism to improve electrode stability and modify product distribution.
Martí Molera   +4 more
wiley   +1 more source

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