Multiphase Molybdenum Carbide Doped Carbon Hollow Sphere Engineering: The Superiority of Unique Double‐Shell Structure in Microwave Absorption

Small, Journal Year: 2022, Volume and Issue: 19(6)

Published: Nov. 27, 2022

In order to achieve excellent electromagnetic wave (EMW) absorption properties, the microstructure design and component control of absorber are critical. this study, three different structures made Mo2 C/C hollow spheres prepared their microwave behavior is investigated. The double-shell consisting an outer thin shell inner rough thick with multiple EMW loss mechanisms exhibit good properties. further improve MoC1-x /C crystalline phases molybdenum carbide optimize capability materials. Finally, α-phase have best When filling 20 wt.%, minimum reflection at 1.8 mm -50.55 dB effective bandwidth 2 5.36 GHz, which expected be a characteristics "thin, light, wide, strong".

Language: Английский

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Facile Synthesis of Gold Nanoparticles for Anticancer, Antioxidant Applications, and Photocatalytic Degradation of Toxic Organic Pollutants

ACS Omega, Journal Year: 2022, Volume and Issue: 7(3), P. 3121 - 3133

Published: Jan. 11, 2022

In the current study, a facile, rapid, and ecologically safe photosynthesis of gold nanoparticles (AuNPs) that remained stable for 3 months is reported to advocate main aspects green chemistry, such as safer solvents auxiliaries, use renewable feedstock. Zi-AuNPs were phytosynthesized by aqueous extract Ziziphus spina-christi leaves, numerous techniques employed their characterization. The results demonstrated successful phytofabrication crystalline AuNPs with brownish-black color, spherical size between 0 10 nm, plasmon peak at 540 surface charge -25.7 mV. showed an effective photodegradation efficiency (81.14%) against malachite good recycling capacity 69.2% after five cycles regeneration. cytotoxicity test 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay signified high anticancer both Z. human breast cancer cells (MCF7 cell line) IC50's 48 40.25 μg/mL, respectively. Highly efficient antioxidant capabilities proven 2,2-diphenyl-1-picrylhydrazyl (DPPH) removal percentages 67.5% 92.34% extract.

Language: Английский

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Emerging MoS2 Wafer-Scale Technique for Integrated Circuits

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: Jan. 18, 2023

Abstract As an outstanding representative of layered materials, molybdenum disulfide (MoS 2 ) has excellent physical properties, such as high carrier mobility, stability, and abundance on earth. Moreover, its reasonable band gap microelectronic compatible fabrication characteristics makes it the most promising candidate in future advanced integrated circuits logical electronics, flexible focal-plane photodetector. However, to realize all-aspects application MoS , research obtaining high-quality large-area films need be continuously explored promote industrialization. Although grain size already improved from several micrometers sub-millimeters, growth wafer-scale is still great challenge. Herein, this review mainly focuses evolution by including chemical vapor deposition, metal–organic thermal conversion technology methods. The state-of-the-art optimization mechanism, nucleation, orientation, grain, defect engineering, systematically summarized. Then, summarizes a transistor, inverter, photodetectors. Finally, current challenges perspectives are outlined for .

Language: Английский

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Transition Metal Compounds Family for Li–S Batteries: The DFT‐Guide for Suppressing Polysulfides Shuttle

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(32)

Published: April 29, 2023

Abstract Lithium–sulfur batteries (LSBs) are considered as one of the best candidates for next generation high‐energy‐density storage devices owing to their superior theoretical energy density, high specific capacity, and sufficient sulfur reservoirs. However, shuttle effect soluble polysulfides sluggish LiPSs redox kinetics restrict further application LSBs. The can be efficiently alleviated conversion accelerated by designing optimal transition metal compounds (TMCs) multifunctional catalyst materials. Herein, recent advances about TMCs in LSBs systematically summarized analyzed. First all, intrinsic structural characteristics relevant on works adsorption energies studies described detail. Second, bonding manners properties analyzed density functional theory (DFT)‐guided calculations, focusing diffusion behavior between LiPSs. Furthermore, mechanism reaction is studied from aspects, thus developing continuous dynamic analysis “adsorption–diffusion–conversion” toward Eventually, this study particularly highlights importance modification engineering provides a forward‐looking overview its prospects introduction previous advanced

Language: Английский

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Structures, properties, and challenges of emerging 2D materials in bioelectronics and biosensors

InfoMat, Journal Year: 2022, Volume and Issue: 4(5)

Published: Feb. 22, 2022

Abstract Bioelectronics are powerful tools for monitoring and stimulating biological biochemical processes, with applications ranging from neural interface simulation to biosensing. The increasing demand bioelectronics has greatly promoted the development of new nanomaterials as detection platforms. Recently, owing their ultrathin structures excellent physicochemical properties, emerging two‐dimensional (2D) materials have become one most researched areas in fields biosensors. In this timely review, representative 2D design nanostructures engineering high‐performance bioelectronic biosensing devices presented. We focus on structural optimization material‐based composites achieve better regulation enhancing performance bioelectronics. Subsequently, recent developments bioelectronics, such simulation, biomolecular/biomarker detection, skin sensors discussed thoroughly. Finally, we provide conclusive views current challenges future perspectives utilizing This review will offer important guidance designing applying thus further promoting prospects a wide biomedical field. image

Language: Английский

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Recent Progress on Phase Engineering of Nanomaterials

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(23), P. 13489 - 13692

Published: Nov. 14, 2023

As a key structural parameter, phase depicts the arrangement of atoms in materials. Normally, nanomaterial exists its thermodynamically stable crystal phase. With development nanotechnology, nanomaterials with unconventional phases, which rarely exist their bulk counterparts, or amorphous have been prepared using carefully controlled reaction conditions. Together these methods are beginning to enable engineering (PEN), i.e., synthesis phases and transformation between different obtain desired properties functions. This Review summarizes research progress field PEN. First, we present representative strategies for direct modulation diverse kinds nanomaterials. We cover ranging from metal nanostructures such as Au, Ag, Cu, Pd, Ru, alloys; oxides, borides, carbides; transition dichalcogenides (TMDs) 2D layered review growth wet-chemical reduction seed-mediated epitaxial chemical vapor deposition (CVD), high pressure transformation, electron ion-beam irradiation. After that, summarize significant influence on various unconventional-phase also discuss potential applications developed areas including catalysis, electrochemical energy storage (batteries supercapacitors), solar cells, optoelectronics, sensing. Finally, existing challenges future directions

Language: Английский

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Emerging two-dimensional (2D) MXene-based nanostructured materials: Synthesis strategies, properties, and applications as efficient pseudo-supercapacitors

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 472, P. 144913 - 144913

Published: July 19, 2023

Supercapacitors, which are essential for addressing modern energy challenges, possess outstanding storage capabilities without requiring manual maintenance. However, their low density and capacity limit applicability electrode materials. Recently, two-dimensional materials (2D), particularly 2D transition metal carbonitrides (MXenes) have attracted considerable interest developing devices because of large specific surface area fast ion-transport pathways. MXenes mainly comprise a (M) layer, carbon and/or nitrogen (X) active functional groups exterior to the layer. Metallic properties M layer offer excellent pseudocapacitance characteristics, while X is characterized by abundant sites conductivity similar that graphene. Compared with conventional materials, existence various on endows them stronger hydrophilicity higher wettability in aqueous electrolytes, which, combined diverse frame structures group combinations, significantly augment devices. Therefore, it necessary summarize analyze research results MXenses. This review addresses applications supercapacitors along current challenges solutions including intercalation, doping, modification methods, heterogeneous structures. Finally, prominent contemporary trends comparatively discussed promote development this field near future.

Language: Английский

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Au- and Pt-decorated Ti3C2Tx MXenes for preparing self-heated and flexible NH3 gas sensors

Sensors and Actuators B Chemical, Journal Year: 2023, Volume and Issue: 403, P. 135112 - 135112

Published: Dec. 6, 2023

Language: Английский

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MXene nanomaterials: Synthesis, properties and applications in energy and environment sector

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 1001, P. 175172 - 175172

Published: June 12, 2024

Language: Английский

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High Entropy Ceramics for Electromagnetic Functional Materials

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 9, 2024

Abstract Microwave absorbing materials play an increasingly important role in modern electronic warfare technology for enhancing electromagnetic compatibility and suppressing interference. High‐entropy ceramics (HECs) possess extraordinary physical chemical properties, more importantly, the high tunability of multi‐component HECs has brought new opportunities to microwave materials. Rich crystallographic distortions occupancies enable have highly efficient absorption excellent mechanical thermal stability. Therefore, structural advantages are integrated from comprehensive perspectives, emphasizing on dielectric magnetic properties phenomenon. Strategies proposed improve capacity HECs, including composition optimization, microstructure engineering, post‐treatment technology. Finally, problems obstacles associated with high‐entropy (HEMs) research discussed. The innovative design concepts highlighted.

Language: Английский

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