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An adsorption-based mercury sensor with continuous readout

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Abstract

A novel readout procedure for a mercury sensor has been proposed. The sensor is based on the surface adsorption. Mercury vapor is adsorbed at the surface of a thin gold layer patterned into four meanders which are connected into a Wheatstone bridge configuration. Sensing is achieved by the resistivity change of the gold film during mercury adsorption. Direct output from the sensor is electric voltage. It takes an additional procedure to convert voltage to mercury concentration. This type of sensor is improved by introducing continuous readout procedure for the voltage–concentration conversion. By using this readout procedure it is possible to monitor mercury vapor concentration as a function of time. Readout is based on the Langmuir time–dependent adsorption theory. This paper illustrates a practical implementation of the new readout procedure.

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Acknowledgments

This work was supported by the Ministry of Education and Science of Republic of Serbia, Contract No. TR 32008 of 2011.

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Authors and Affiliations

  1. University of Belgrade, IHTM Center for Microelectronic Technologies and Single Crystal, Njegoševa 12, 11000, Belgrade, Serbia

    Milija Sarajlić & Vesna B. Jović

  2. University of Belgrade, IHTM Center for Chemistry, Njegoševa 12, 11000, Belgrade, Serbia

    Srđan P. Petrović & Dragana S. Đorđević

  3. Institute of Technical Sciences of the Serbian Academy of Sciences and Arts, Knez Mihailova 35/IV, 377, 11000, Belgrade, Serbia

    Zoran G. Đurić

Authors
  1. Milija Sarajlić
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  2. Zoran G. Đurić
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  3. Vesna B. Jović
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  4. Srđan P. Petrović
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  5. Dragana S. Đorđević
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Correspondence to Milija Sarajlić.

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Sarajlić, M., Đurić, Z.G., Jović, V.B. et al. An adsorption-based mercury sensor with continuous readout. Microsyst Technol 19, 749–755 (2013). https://doi.org/10.1007/s00542-012-1679-6

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  • DOI: https://doi.org/10.1007/s00542-012-1679-6

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