Articles producció científica> Enginyeria Electrònica, Elèctrica i Automàtica

Operando Investigation of WS2 Gas Sensors: Simultaneous Ambient Pressure X-ray Photoelectron Spectroscopy and Electrical Characterization in Unveiling Sensing Mechanisms during Toxic Gas Exposure

  • Identification data

    Identifier: imarina:9378979
    Authors:
    Scardamaglia, MattiaCasanova-Chafer, JuanTemperton, RobertAnnanouch, Fatima EzahraMohammadpour, AminMalandra, GabrielDas, ArkapravaAlagh, AanchalArbouch, ImaneMontoisy, LoicCornil, DavidCornil, JeromeLlobet, EduardBittencourt, Carla
    Abstract:
    Ambient pressure X-ray photoelectron spectroscopy (APXPS) is combined with simultaneous electrical measurements and supported by density functional theory calculations to investigate the sensing mechanism of tungsten disulfide (WS2)-based gas sensors in an operando dynamic experiment. This approach allows for the direct correlation between changes in the surface potential and the resistivity of the WS2 sensing active layer under realistic operating conditions. Focusing on the toxic gases NO2 and NH3, we concurrently demonstrate the distinct chemical interactions between oxidizing or reducing agents and the WS2 active layer and their effect on the sensor response. The experimental setup mimics standard electrical measurements on chemiresistors, exposing the sample to dry air and introducing the target gas analyte at different concentrations. This methodology applied to NH3 concentrations of 100, 230, and 760 and 14 ppm of NO2 establishes a benchmark for future APXPS studies on sensing devices, providing fast acquisition times and a 1:1 correlation between electrical response and spectroscopy data in operando conditions. Our findings contribute to a deeper understanding of the sensing mechanism in 2D transition metal dichalcogenides, paving the way for optimizing chemiresistor sensors for various industrial applications and wireless platforms with low energy consumption.
  • Others:

    Author, as appears in the article.: Scardamaglia, Mattia; Casanova-Chafer, Juan; Temperton, Robert; Annanouch, Fatima Ezahra; Mohammadpour, Amin; Malandra, Gabriel; Das, Arkaprava; Alagh, Aanchal; Arbouch, Imane; Montoisy, Loic; Cornil, David; Cornil, Jerome; Llobet, Eduard; Bittencourt, Carla
    Department: Enginyeria Electrònica, Elèctrica i Automàtica
    URV's Author/s: Alagh, Aanchal / Annanouch, Fatima Ezahra / Casanova Chafer, Juan / Llobet Valero, Eduard
    Keywords: Tungsten compounds Tungsten Surfacepotential Surface potential Range Pressure Photoelectron spectroscopy Oxide Operando spectroscopy Nitrogen dioxide Monolayer mos2 Molecules Gases Gas sensing Gas sensin Density functional theory Charge-transfer Behavior Band bending Ammonia 2
    Abstract: Ambient pressure X-ray photoelectron spectroscopy (APXPS) is combined with simultaneous electrical measurements and supported by density functional theory calculations to investigate the sensing mechanism of tungsten disulfide (WS2)-based gas sensors in an operando dynamic experiment. This approach allows for the direct correlation between changes in the surface potential and the resistivity of the WS2 sensing active layer under realistic operating conditions. Focusing on the toxic gases NO2 and NH3, we concurrently demonstrate the distinct chemical interactions between oxidizing or reducing agents and the WS2 active layer and their effect on the sensor response. The experimental setup mimics standard electrical measurements on chemiresistors, exposing the sample to dry air and introducing the target gas analyte at different concentrations. This methodology applied to NH3 concentrations of 100, 230, and 760 and 14 ppm of NO2 establishes a benchmark for future APXPS studies on sensing devices, providing fast acquisition times and a 1:1 correlation between electrical response and spectroscopy data in operando conditions. Our findings contribute to a deeper understanding of the sensing mechanism in 2D transition metal dichalcogenides, paving the way for optimizing chemiresistor sensors for various industrial applications and wireless platforms with low energy consumption.
    Thematic Areas: Process chemistry and technology Nanoscience & nanotechnology Instrumentation Fluid flow and transfer processes Engenharias iii Chemistry, multidisciplinary Chemistry, analytical Bioengineering
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: juan.casanova@urv.cat fatimaezahra.annanouch@urv.cat aanchal.alagh@estudiants.urv.cat aanchal.alagh@estudiants.urv.cat eduard.llobet@urv.cat
    Author identifier: 0000-0003-1533-6482 0000-0003-2466-8219 0000-0003-2466-8219 0000-0001-6164-4342
    Record's date: 2024-10-19
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://pubs.acs.org/doi/10.1021/acssensors.4c01033
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Acs Sensors. 9 (8): 4079-40880
    APA: Scardamaglia, Mattia; Casanova-Chafer, Juan; Temperton, Robert; Annanouch, Fatima Ezahra; Mohammadpour, Amin; Malandra, Gabriel; Das, Arkaprava; Alagh (2024). Operando Investigation of WS2 Gas Sensors: Simultaneous Ambient Pressure X-ray Photoelectron Spectroscopy and Electrical Characterization in Unveiling Sensing Mechanisms during Toxic Gas Exposure. Acs Sensors, 9(8), 4079-40880. DOI: 10.1021/acssensors.4c01033
    Article's DOI: 10.1021/acssensors.4c01033
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2024
    Publication Type: Journal Publications
  • Keywords:

    Bioengineering,Chemistry, Analytical,Chemistry, Multidisciplinary,Fluid Flow and Transfer Processes,Instrumentation,Nanoscience & Nanotechnology,Process Chemistry and Technology
    Tungsten compounds
    Tungsten
    Surfacepotential
    Surface potential
    Range
    Pressure
    Photoelectron spectroscopy
    Oxide
    Operando spectroscopy
    Nitrogen dioxide
    Monolayer mos2
    Molecules
    Gases
    Gas sensing
    Gas sensin
    Density functional theory
    Charge-transfer
    Behavior
    Band bending
    Ammonia
    2
    Process chemistry and technology
    Nanoscience & nanotechnology
    Instrumentation
    Fluid flow and transfer processes
    Engenharias iii
    Chemistry, multidisciplinary
    Chemistry, analytical
    Bioengineering
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