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Advanced Materials

High-Performance Sensors Based on Molybdenum Disulfide Thin Films

Authors

  • Kangho Lee,

    1. Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) and Advanced Materials and Bioengineering Research (AMBER) Centre, Trinity College Dublin, Ireland
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  • Riley Gatensby,

    1. School of Chemistry, Trinity College Dublin, Ireland
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  • Niall McEvoy,

    1. Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) and Advanced Materials and Bioengineering Research (AMBER) Centre, Trinity College Dublin, Ireland
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  • Toby Hallam,

    1. Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) and Advanced Materials and Bioengineering Research (AMBER) Centre, Trinity College Dublin, Ireland
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  • Georg S. Duesberg

    Corresponding author
    1. Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) and Advanced Materials and Bioengineering Research (AMBER) Centre, Trinity College Dublin, Ireland
    2. School of Chemistry, Trinity College Dublin, Ireland
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Abstract

High-performance sensors based on molybdenum disulfide (MoS2) grown by sulfurization of sputtered molybdenum layers are presented. Using a simple integration scheme, it is found that the electrical conductivity of MoS2 films is highly sensitive to NH3 adsorption, consistent with n-type semiconducting behavior. A sensitivity of 300 ppb at room temperature is achieved, showing the high potential of 2D transition metal-dichalcogenides for sensing.

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