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    • ZIF-90-modified Terahertz Metasurface Sensor for Detecting Trace Acetone Gas with High Sensitivity and Specificity

    Zhitao Duan,Fangrong Hu,Shangjun Lin, Jie Chen,Longhui Zhang,Mingzhu Jiang

    IEEE SENSORS JOURNAL（2024）

    Guilin Univ Elect Technol

    Cited 1|Views17
    Abstract
    Acetone gas can give rise to serious harm to the ecological environment and human health. In addition, acetone gas in the human exhaled breath can be used as an important biomarker for diabetes, lung cancer, lipid peroxidation and other diseases. Therefore, the detection of trace acetone gas is important for environment monitoring and disease diagnosis. Here, a four-split-ring-resonator terahertz (THz) metasurface sensor is proposed to detect trace acetone gas with high sensitivity, and the sample is fabricated using micromachining process. A new Metal-organic-framework (MOF) material Zeolitic-Imidazolate-Framework-90 (ZIF-90) is modified on the surface of the sensor to improve its specificity for acetone gas. When the concentration increases from 10 ppm (parts per million) to 100 ppm, the frequency shift of the sensor shows good linear with the concentration. The minimum measurable concentration is 10 ppm, and sensitivity is 0.1 GHz/ppm (or 10 ppm/GHz). This work paves a way for developing novel biosensors with high sensitivity and specificity, and it has potential applications in the fields of trace gas detection and disease diagnosis at early stage.
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    Acetone gas detection,metal-organic framework (MOF),surface modification,terahertz (Thz) metasur-face sensor,zeolitic imidazolate framework-90 (ZIF-90)
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