Impedimetric humidity and temperature sensing properties of the graphene–carbon nanotubes–silicone adhesive nanocomposite

Nano-composite of the graphene (43 wt%), carbon nanotubes (43 wt%) and silicon adhesive (14 wt%) was synthesized and deposited in the form of 90 µm thick films in-between two pre-deposited metallic electrodes through the doctor blade technology. It was observed that the impedance and the capacitance...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2019-04, Vol.30 (7), p.6419-6429
Main Authors: Chani, Muhammad Tariq Saeed, Karimov, Khasan S., Asiri, Abdullah M.
Format: Article
Language:English
Subjects:
Carbon nanotubes
Characterization and Evaluation of Materials
Chemistry and Materials Science
Commercialization
Detection
Graphene
Humidity
Impedance
Materials Science
Measuring instruments
Nanocomposites
Optical and Electronic Materials
Relative humidity
Sensors
Thick films
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Summary:Nano-composite of the graphene (43 wt%), carbon nanotubes (43 wt%) and silicon adhesive (14 wt%) was synthesized and deposited in the form of 90 µm thick films in-between two pre-deposited metallic electrodes through the doctor blade technology. It was observed that the impedance and the capacitance of the sensors changed with relative humidity up to − 84.5 Ω/%RH and 1336.7 pF/%RH, respectively. The change in impedance and resistance with temperature was equal to − 19.8 Ω/ºC. The sensing range for temperature is 37–87 °C and that of relative humidity is 36 to 94%. For humidity sensing the response and recovery times are up to 26 s and 74 s, respectively. The fabricated sensors are attractive for commercialization in the form of humidity and temperature measuring instrument.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-019-00945-6