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Atomic structures and electronic properties of different contact surfaces for C F -SiO triboelectric nanogenerator based on first-principles investigations.
RSC Adv
January 2025
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications Beijing 100876 China
Modification of the dielectric friction layer materials is an ideal way to enhance the output performance of a triboelectric nanogenerator (TENG), but current research mostly focuses on the metal-polymer or metal-SiO materials. In this work, we constructed different TENG models based on polymer C F -SiO electret materials, and the electronic properties of the different contact surfaces were investigated using first principles. We found that the charge transfer in C F -SiO materials occurred only at the contact interface, and it was partially affected by the terminal atoms near the SiO interface.
View Article and Find Full Text PDFTidal Deformation and Dissipation Processes in Icy Worlds.
Space Sci Rev
January 2025
Faculty of Mathematics and Physics, Department of Geophysics, Charles University, V Holesšovičkách 2, Praha, Praha 8 180 00 Czech Republic.
Tidal interactions play a key role in the dynamics and evolution of icy worlds. The intense tectonic activity of Europa and the eruption activity on Enceladus are clear examples of the manifestation of tidal deformation and associated dissipation. While tidal heating has long been recognized as a major driver in the activity of these icy worlds, the mechanism controlling how tidal forces deform the different internal layers and produce heat by tidal friction still remains poorly constrained.
View Article and Find Full Text PDFInhibiting Friction-Induced Exogenous Adhesion via Robust Lubricative Core-Shell Nanofibers for High-Quality Tendon Repair.
Biomacromolecules
January 2025
Department of Hepatobiliary Surgery, Hebei International Joint Research Center for Digital Twin Diagnosis and Treatment of Digestive Tract Tumors, Baoding Key Laboratory of Precision Diagnosis and Treatment of Digestive Tract Tumors, Affiliated Hospital of Hebei University, Baoding 071000, China.
Friction is the trigger cause for excessive exogenous adhesion, leading to the poor self-repair of the tendon. To address this problem, we developed electrospun dual-functional nanofibers with surface robust superlubricated performance and bioactive agent delivery to regulate healing balance by reducing exogenous adhesion and promoting endogenous healing. Coaxial electrospinning and our previous developed in situ robust nanocoating growth techniques were employed to create the lubricative/repairable core-shell structured nanofibrous membrane (L/R-NM).
View Article and Find Full Text PDFPassive earth pressure analysis considering hydraulic and mechanical hysteresis for unsaturated soil.
PLoS One
January 2025
Water Resources Engineering Department, College of Engineering, Salahaddin University, Erbil, Iraq.
This paper addresses the mechanical characteristics of a passive earth pressure problem taking into account water retention curve (SWRC) hysteresis. Both hydraulic (drying and wetting cycles) and mechanical hysteresis were considered. Parametric studies were carried out at various air entry values (AEV = 5-30 kPa), different wall frictions (δ = 0, 0.
View Article and Find Full Text PDFIsotope effects in Eley-Rideal abstraction of hydrogen from tungsten surfaces: the role of dissipation.
Phys Chem Chem Phys
January 2025
Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR5255, F-33400 Talence, France.
Molecular dynamics simulations are performed to investigate the influence of isotope substitutions on the Eley-Rideal recombination dynamics of hydrogen isotopes from the (100) and (110) surfaces of tungsten. Dissipation of electrons and phonons is taken into account by, respectively, the local density friction approximation and the general Langevin oscillator, effective models which have been intensively used in recent years. As the coupling to surface phonons and electrons might be altered by the mass combination, the main objective of the paper is to assess the role of dissipation to the surface in the course of abstraction.
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