Improved thermoelectric properties of α-phase Cu₂Se thin films through multiphase nanostructuring

RSC Advances, Год журнала: 2025, Номер 15(13), С. 9854 - 9863

Опубликована: Янв. 1, 2025

Copper selenide (Cu2Se) has been extensively studied due to its promising thermoelectric properties in bulk form. However, the miniaturization of devices using thin films is highly desired for smart applications. To date, there are few reports on composite Cu2Se applications, primarily their lower conversion efficiency. In present work, Cu2Se-based multiphase nanocomposites presented demonstrate enhanced The detailed structural characterization reveals that thermally evaporated Te-doped have compositions. electrical conductivity decreases after Te-doping, enormous scattering carriers against secondary phases and lattice defects. upon further increasing Te-doping concentration, both Seebeck coefficient start simultaneously, formation Cu2Te nanoclusters Te-Se solid solution, matrix Cu2Se. We emphasize power factor, with highest value reaching 234.0 μW mK-2 at 400 K, as a key indicator performance. A slightly overestimated dimensionless figure-of-merit (ZT) 0.2 was obtained factor merely electronic part thermal conductivity. current synthesis route synergizes effects system film research enhance efficiency related materials classes.

Язык: Английский

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Enhanced electromagnetic shielding and surface modulation of electrospun cellulose acetate-based fiber membranes via multi-walled carbon nanotubes and in-situ polyaniline polymerization

Colloids and Surfaces A Physicochemical and Engineering Aspects, Год журнала: 2025, Номер 718, С. 136957 - 136957

Опубликована: Апрель 15, 2025

Язык: Английский

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Microballoon and high energy radiation engineered Polycaprolactone-carbon nanotube based segregated conducting network for suppressing of electromagnetic radiation interference

Next Materials, Год журнала: 2025, Номер 8, С. 100654 - 100654

Опубликована: Апрель 18, 2025

Язык: Английский

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Biomimetic Network and Microstructure for Multifunctional Recyclable Ramie Fiber-Reinforced Composites: High-Hydrophobic, Wave-Transparent, and Heat-Conducting

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Апрель 23, 2025

Ramie fiber yarn (PRF), characterized by its superior microwave transmittance (MWT), is a novel material that can effectively substitute traditional glass (D-GF) in the fabrication of composites for communication equipment shells. However, super hydrophilicity and inadequate thermal conductivity (λ) PRF hinder overall performance safety use. To date, no effective strategy has been developed to prepare multifunctional PRF-reinforced composites, including high hydrophobicity, MWT, λ. Herein, integrating template method with vacuum-assisted spraying technology, mosquito-eye-like honeycomb network was constructed on surface fabric. This network, composed nacre-like brick-and-mortar microstructures as fundamental units, achieves both mesoscopic microscopic order. The biomimetic microstructure enable fabric transition from superhydrophilic high-hydrophobic, significantly reducing water absorption levels similar D-GF-reinforced composites. Furthermore, structures are incorporated into composite interface via surface, resulting MWT λ values up 98% 1.0582 W/mK, respectively. Importantly, waste be fully transformed particles, thereby enabling closed-loop recycling reuse. offer an efficient versatile modification

Язык: Английский

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Nonvolatile Control of Optical and Electronic Responses in Two-Dimensional MoS₂ via Ferroelectric ScAlN Thin Films

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер 17(18), С. 26920 - 26930

Опубликована: Апрель 28, 2025

Wurtzite-structured ScAlN is a recently discovered ferroelectric material, and unique functionalities can emerge at the heterointerface between two-dimensional (2D) semiconductors, territory that has yet to be fully explored. In this work, we report controlled fabrication of inch-scale thin films with high properties via reactive co-sputtering as well nonvolatile control photoluminescence (PL) emission electronic responses in 2D MoS2 by interfacing ScAlN. The results show as-grown are uniform wafer scale (≥2 in.) possess an ultrasmooth surface (≤1.7 Å), ultralow coercive field (≤0.04 V/nm), out-of-plane polar axis. By monolayer ScAlN, realize modulation PL intensity position MoS2, which attributed ScAlN's polarization-induced exciton-to-trion conversion, evidenced pizoresponse force microscopy mapping analyses. Moreover, fabricate high-performance ScAlN/2D field-effect transistors, exhibit current switching ratio (≥4.3 × 106) subthreshold swing (≤4.17 mV dec-1), exceeding most previously reported ScAlN/semiconductor devices. This study not only offers cost-effective route high-quality but also promotes development advanced optoelectronic devices based on III-nitride ferroelectric/2D heterostructures.

Язык: Английский

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Recent developments in the fabrication, performance, and application of transparent superhydrophobic coatings

Advances in Colloid and Interface Science, Год журнала: 2025, Номер 342, С. 103537 - 103537

Опубликована: Май 2, 2025

Язык: Английский

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The Effects of Y and Zn Elements on the Mechanical and Electromagnetic Shielding Properties of LZ81 Alloy

Materials Today Communications, Год журнала: 2025, Номер unknown, С. 112794 - 112794

Опубликована: Май 1, 2025

Язык: Английский

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Evolution of Radial Aggregated Structure Within Polyacrylonitrile‐Based Fibers During Stretching

Journal of Applied Polymer Science, Год журнала: 2025, Номер unknown

Опубликована: Май 11, 2025

ABSTRACT The water bath stretching process offers an effective approach to tune microcrystals and orientation parameters of carbon fibers, thereby enhancing their performance. However, a comprehensive understanding the evolution mechanism aggregated structures during governing radial heterogeneity in PAN fibers remains poorly understood. Herein, we use nascent that have undergone solvent removal stretch at varying temperatures quantitatively analyze structures. results reveal into structural stems from stress gradient distribution stretching. This is accompanied by gradual formation more ordered stacking molecular chain skin region compared core region. becomes pronounced with elevated temperature. Importantly, adjusting alignment, optimal precursor exhibit significantly enhanced mechanical performance when stretched 75°C. study could provide valuable insights for regulation polyacrylonitrile‐based

Язык: Английский

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Bioinspired structural laminates with superior ice-repellence and damage resistance for aviation applications

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 163753 - 163753

Опубликована: Май 1, 2025

Язык: Английский

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Structure-driven design of cellular graphene/polystyrene composites with balanced dielectric loss and impedance matching for enabling multiband electromagnetic wave absorption

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 164290 - 164290

Опубликована: Май 1, 2025

Язык: Английский

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