Abstract:
Parallel plate capacitive gas sensor was assembled using Graphene Oxide (GO) as the
transducer material. The sensor was tested with NO2 as the target gas. GO was
synthesized according to the Improved Hummer's Method (Tours Method) in which
vein graphite was sufficiently oxidized. Synthesized graphene oxide was characterized
by Fourier Transform Inirared Spectroscopy (FTIR) and Thermogravimetric Analysis
(TGA) ascertaining that products were well oxidized. Sensor was tested for
capacitance variation in the fi^equency and time domains under the influence of
constant temperature ramp. The results showed an average response time of about 2
minutes to reach the steady state signal and an equal time to reach the initial reference
signal levels once the testing chamber was evacuated of the target gas.
Citation:
Deemantha, M.B.A., Gunasena, R.G.S.P., & Amarasinghe, D.A.S. (2019).Development of Graphene Oxide based capacitive gas sensor for NO2 detection
[Abstract]. In V. Sivahar & H.S. Sitinamaluwa (Eds.), Dreams to reality through innovative materials (p. 4). Department of Materials Science and Engineering, University of Moratuwa.
