Recent advances in 2D MXene-based heterostructures for gas sensing: mechanisms and applications in environmental and biomedical fields

Nanoscale, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Schematic representation of MXene based gas sensors: including synthesis, materials design, application and challenges.

Language: Английский

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Effects of different contents yttrium doping on the electrical performance and stability of bilayer IZO/IYZO thin-film transistors

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(14)

Published: April 1, 2025

In this study, the effects of doping with different contents rare-earth element yttrium (Y) on electrical performance indium zinc oxide (IZO) and bilayer IZO/IYZO thin-film transistors (TFTs) were investigated. Through a rational design, TFT exhibits best Vth 0.2 V μFE 32.6 cm2/V s. X-ray photoelectron spectroscopy band structure analysis demonstrated that, in TFT, 6-nm highly conductive ultrathin IZO provided free electrons electron transfer from layer to IYZO formation bending, thus increased carrier mobility devices. addition, 20-nm-thick controlled Ne by forming potential barrier (0.38 eV), thereby increasing stability. Moreover, experimental characterization revealed that Y can reduce concentration, oxygen vacancies, surface defects, other trap densities Therefore, stability small shifts −0.9, 0.8, −1.1, 1.0 under negative gate bias stress, positive light illumination stress measurements. Overall, designed TFTs open effective pathways for achieving high-performance TFTs.

Language: Английский

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Antimony‐Hybridization Engineering in p‐n Heterojunctions for Optimized Electromagnetic Wave Absorption

Small, Journal Year: 2025, Volume and Issue: unknown

Published: May 8, 2025

Abstract The Sb‐hybridization strategy enables the precise construction of p‐n heterojunctions, which significantly enhances electromagnetic wave (EMW) absorption performance by optimizing interface polarization. In this study, an innovative in situ ion‐exchange method is developed to implement Sb hybridization, establishing built‐in electric fields within CoS 2 /Sb S 3 @CNFs that amplify polarization relaxation loss. This structural design synergistically combines a carbon‐skeleton‐induced conductive network with magnetic loss mechanisms , ultimately yielding exceptional EMW absorber. optimized composite demonstrates remarkable attenuation capabilities, achieving minimum reflection (RL min ) −57.53 dB at mm and effective bandwidth (EAB max 7.28 GHz (covering X‐band (8–12 GHz) Ku‐band (12–18 GHz)). study not only provides novel for designing advanced absorbers but also highlights significance heterojunction engineering functional composites.

Language: Английский

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Comprehensive overview of detection mechanisms for toxic gases based on surface acoustic wave technology

Applied Physics Reviews, Journal Year: 2024, Volume and Issue: 11(4)

Published: Dec. 1, 2024

Identification and detection of toxic/explosive environmental gases are paramount importance to various sectors such as oil/gas industries, defense, industrial processing, civilian security. Surface acoustic wave (SAW)-based gas sensors have recently gained significant attention, owing their desirable sensitivity, fast response/recovery time, wireless capabilities, reliability. For detecting types targeted gases, SAW with different device structures sensitive materials been developed diversified working mechanisms. This paper is focused on overviewing recent advances in mechanisms theories dominant key mechanisms/principles for targeting the realm sensors. The basic sensing parameters briefly discussed, then major influencing factors systematically reviewed, including effects layer materials, temperature/humidity, UV illumination overall performance We further highlight relationships adsorption/desorption principles between NH3, NO2, H2S, explosive H2, 2,4,6-trinitrotoluene, organic isopropanol, ethanol, acetone, well others CO, SO2, HCl. Finally, we discuss challenges future outlooks designing methodologies enhancing sensors, offering fundamental guidance developing good performance.

Language: Английский

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Carbon and cobalt co-doped ZnO thin films for highly sensitive and selective ammonia detection at room temperature

Materials Advances, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 13, 2024

Co and C co-doped ZnO thin films deposited via spray pyrolysis are highly selective to ammonia with a sensor response of 2729 50 ppm ammonia.

Language: Английский

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