Danh mục: Bài báo khoa học

Abstract The chemical and microstructural features of poly(styrenesulfonic acid) (PSSA)-grafted poly(ethylene-co-tetrafluoroethylene) (ETFE) polymer electrolyte membranes (ETFE-PEMs) through preparation procedures and grafting degree (GD) are investigated by solid-state 13C cross polarization/magic angle spinning solid-state nuclear magnetic resonance (13C CP/MAS NMR) spectra, atomic force microscope (AFM), X-ray diffraction (XRD), and Doppler broadening (DB) of positron-annihilation radiation measurement. Especially,...

Abstract In the present work, composites of SnO2 and biocarbon from cashew residue were applied and reported for the first time as anode materials of Li-ion batteries. The composites were developed via a two-step synthesis route consisting of pretreating the cashew residue to create biocarbon, followed by compositing the biocarbon with SnO2. The calcination temperatures were...

Abstract Safety concerns in lithium-ion batteries (LIBs) poses safety risks due to flammable liquid electrolytes and dendrite formation. Solid polymer electrolytes (SPEs) offer a safer alternative, though limited by low ionic conductivity and poor dendrite resistance. In this study, a SPE based on poly(ethylene oxide) (PEO) was modified to by blending with polyvinylidene fluoride (PVDF)...

Abstract The approach for detecting trace amounts of microplastics using surface-enhanced Raman spectroscopy (SERS) faces a significant challenge because the size of individual nanoparticles is considerably smaller than that of microplastics. Therefore, it is imperative to develop a type of nanoparticle that can form a larger surface area while still preserving excellent surface plasmon properties...

Abstract Advanced cryptographic devices employ multiscale countermeasures to bolster resilience against side-channel analysis (SCA). In masking-based defenses, secure substitution-boxes (S-boxes) and effective masking schemes are paramount. Additionally, the time-based hiding techniques, leveraging multiple clocks for individual encryption operations, offer significant protection. This article introduces a novel multiscale countermeasure: an improved tower field masking scheme integrated...

Abstract Let D be a division ring with center F, and let n > 1 be an integer. A known result due to Kursov asserts that if D is finite-dimensional over F, then the commutator width of the general linear group GLn(D) is at most one greater than that of GLn(D). In the absence of the finite-dimensionality assumption, recent research has made significant...

Abstract In this work, we investigated the thermoelectric properties of MoS2 thin films deposited on SiO2/Si wafer substrates as prepared by the radio frequency (RF) magnetron sputtering technique. A fixed sputtering power of 200 W was maintained for 30 min to facilitate thin film deposition. After thin film deposition, as-deposited thin films were annealed by the vacuum annealing...

Abstract Background: Acellular tubular artery scaffolds offer structural support for vascular regeneration but are inherently limited by poor anticoagulant properties, which increases the risk of thrombus formation following implantation. This thrombogenicity remains a major obstacle to their clinical application, particularly in small-diameter vascular grafts. Methods: To address this challenge, the present study investigates the use...

Abstract This article tackles the ill-posed challenge of solving a nonlinear heat transfer equation in backward form. Traditional regularization methods (Tikhonov, quasi-reversibility, quasi-boundary value, truncation, etc.) exist, but we introduce a novel approach based on nonlocal diffusion equations with a rescaled convolution kernel. We will provide error estimates and demonstrate the accuracy of this technique...

Abstract This study investigates and compares the characteristics and potential sources of carbonaceous aerosols in fine particulate matter (PM2.5) between urban and suburban areas of Hanoi. Daily samples were collected at two sites in Hanoi, Vietnam, including HUCE (urban) and Thuong Tin (suburban), during June, July, and August 2024, corresponding to the summer period in...