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Sensors and actuators. A, Physical v.269, 2018년, pp.79 - 90   SCI SCIE
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A temperature-compensated graphene sensor for nitrate monitoring in real-time application

Alahi, Md Eshrat E. (Faculty of Science and Engineering, Macquarie University, NSW 2109, Australia ) ; Nag, Anindya (Faculty of Science and Engineering, Macquarie University, NSW 2109, Australia ) ; Mukhopadhyay, Subhas Chandra (Faculty of Science and Engineering, Macquarie University, NSW 2109, Australia ) ; Burkitt, Lucy (Institute of Agriculture and Environment, Massey University, Palmerston North, New Zealand ) ;
  • 초록  

    Abstract Low-cost nitrate-N sensors and smart sensing systems are necessary to develop a distributed network to monitor the quality of water in real time. This paper presents the fabrication process of carbon printed sensors and the advantage of using a graphene sensor to measure the concentration of nitrate-N in water. The sensor was characterized at different temperatures and with different nitrate-N concentrations in water. Electrochemical Impedance Spectroscopy (EIS) was employed to characterize the developed sensors. The calibration standard with the temperature compensation is also explained. UV-Spectrometry was used to validate all the results and the range of concentrations was 1–70ppm. The sensing system has WiFi connectivity to transfer the data to a cloud server to monitor the data in real time. The sensor has shown good performance during measurements and the developed sensing system has very good potential to be a part of a distributed sensing network to monitor the data in real time. Highlights Fabrication process of CNT PDMS and Graphene based Interdigital Sensor. UV-Spectroscopy has been used for validation. The detection limit of nitrate-N is 1–70ppm. Temperature compensation is included to improve the measurement. An IoT enabled smart sensing system is proposed to monitor nitrate-N concentration in real-time.


  • 주제어

    Graphene sensor .   Nitrate monitoring .   Printed sensor .   Temperature compensation .   Smart sensing system .   Internet of things (IoT).  

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