纳黎萱大学

Strain engineering has emerged as a powerful approach to modulate the electronic and optical properties of two-dimensional materials without altering their chemical composition. Among these materials, transition metal dichalcogenides (TMDs) have attracted significant attention due to their strong light-matter interactions and highly tunable band structures. Various strain-induced morphologies, including domes, grooves, and roll-ups, have been widely explored to achieve localized carrier confinement and exciton modulation. In particular, dome-like geometries formed in nanopillar-based architectures provide a versatile platform for engineering strain distributions and position-dependent optical responses. However, the electronic and excitonic properties of dome structures with large height-to-radius ratios and flattened apex geometries remain poorly understood. To address this limitation, we investigate dome-shaped TMD monolayers using a geometry-controlled model based on a Woods-Saxon-type height profile. We show that curvature engineering induces a transition between distinct carrier confinement regimes, leading to strong modulation of electronic states and excitonic transitions. This enables continuous tuning of photoluminescence across the near-infrared (NIR) spectrum, extending into the long-wavelength NIR region that is difficult to access using conventional material or compositional approaches. These findings demonstrate strong potential for broadband NIR technologies, particularly in the long-wavelength regime, establishing a tunable NIR emitter platform for deep-tissue imaging and optical communications. (c) 2026 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

We use the Hermitian bilinear form to explore unitary matrices over the finite field Fq2 . We demonstrate that any square matrix over Fq2 can be expressed as a sum of these unitary matrices. We study the sum of orthogonal matrices over this field in further detail. Any A is an element of Mn(Fq2) when char(Fq) =/ 2 can be expressed as a sum of at most 8n2 or 16n2 orthogonal matrices depending on whether n is even or odd. When char(Fq) = 2, then A is a sum of orthogonal matrices if and only if A or A + In is a matrix with unit row and column sums. During the proofs of the mentioned outcomes, a variety of strategies and tactics are provided. (c) 2026 Elsevier Inc. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

Barium hexaferrite (BaFe12O19 or BaF) is a hard ferrite with high coercivity and strong magnetization. In this work, flexible magnetic rubber composites were developed by incorporating waste-derived BaFe12O19 (W-BaF) filler, synthesized from steel industry waste, into natural rubber (NR) at loadings of 0–60 phr. The vulcanization characteristics, mechanical behaviors, and magnetic properties of the NR composites were evaluated and compared with those of NR composites containing commercial BaFe12O19 (C-BaF) filler. It was found that both W-BaF and C-BaF powders showed a plate-like hexagonal morphology. However, differences in particle size and morphology between W-BaF and C-BaF powders resulted in distinct dispersion behaviors of the fillers within the NR matrix. Consequently, the NR/BaF composites containing W-BaF filler exhibited differences in vulcanization characteristics, mechanical behavior, and magnetic properties compared with those containing C-BaF filler. Although the addition of W-BaF filler enhanced the magnetic properties of NR, its effect was less pronounced than that of the C-BaF filler. This finding suggests that a higher loading of W-BaF filler may be necessary to achieve the desired magnetic performance in flexible magnetic rubber composites for practical applications. Notably, this work found that the NR composites containing W-BaF exhibited better retention of tensile properties during thermal aging than those containing C-BaF. These findings demonstrate the feasibility of upcycling locally available steel industry waste into BaFe12O19 filler through local synthesis and processing, providing a waste valorization strategy for developing magnetic NR composites with potential applications as bonded permanent magnets in refrigerator gaskets and small motors.

Hospital transport services represent a vital alternative for addressing inequities in access to medical care, particularly in countries where public transportation systems are inadequate, such as Thailand. This approach enables equitable and widespread access to healthcare services for residents in underserved areas. The objective of this study is to analyze the factors influencing the choice of hospital transport travel mode by comparing various machine learning algorithms. The findings reveal that the categorical boosting model outperformed the other models across all performance metrics. The model results indicate that waiting time, travel time, travel cost, and comfortability significantly influence the decision to use hospital transport services. Furthermore, demographic data analysis highlights critical factors such as age, gender, income, travel frequency, occupation, and time of travel, all of which significantly affect the choice of hospital transport service. To maximize the practical implications of this study, policy recommendations and implementation strategies are proposed to support decision-makers in promoting equitable travel options and eliminating barriers to fair access to healthcare services.

Solid drug-hydroxypropyl-β-cyclodextrin (HPβCD) inclusion complexes are used to enhance drug solubility and microneedle (MN)-mediated delivery efficiency. However, mechanistic understanding of HPβCD effects in solution on drug transport across pathways in MN-pretreated skin remains limited. This study investigated the in vitro permeation of rhein (RN) across MN-pretreated neonatal porcine skin from saturated RN solutions containing 0–200 mM HPβCD. Phase solubility, total flux (Jtotal), and permeability coefficient through the microchannel pathway (PMCP) were determined, along with dermal transport at varying HPβCD concentrations. Permeation experiments under asymmetric and symmetric donor–receiver HPβCD conditions were conducted to elucidate potential interactions between HPβCD and skin transport pathways. RN solubility increased from 241.9 ± 16.4 µg/mL (0 mM HPβCD) to 1,092.5 ± 54.9 µg/mL (200 mM HPβCD), showing a linear trend up to 50 mM. MN permeation studies confirmed that RN transport occurred predominantly through microchannels. The highest Jtotal (3.87 ± 0.40 μg/cm2/h) was achieved at 25 mM HPβCD, with no further enhancement at higher concentration. Although increasing HPβCD concentration improved RN solubility, PMCP and dermal transport decreased. Identical permeation profiles under symmetric and asymmetric conditions at 50 mM HPβCD indicated no direct interaction between HPβCD and MN-pretreated skin. In summary, HPβCD-mediated solubility enhancement increased RN flux across MN-pretreated skin, but not microchannel permeability or dermal diffusion.