Abstract:
Gas sensors are chemical sensors which have a transducer and an active layer for
converting the chemical information into another form of electronic signal. Gas detection
and determining the composition of a gas in a mixture is necessary in many different
fields. In this research, development of metal oxide based sensing material layer and
design of sensor platform were on focus. SnO2 was selected as the main precursor of the
sensing material and Mn as the dopant. Material deposition was done by spin coating
method on soda lime glass substrate. The complete platform consists of sensor material,
heating element, temperature monitoring and control unit, Arduino board for data
acquisition and signal processing. The temperature dependence of resistivity of SnO2 film
was studied in detail in the presence of different gases and gas mixtures. The results shows
that the Mn doped spin coated SnO2 thin film is a promising method for the preparation of
high quality ethanol sensor even in a mixture of ethanol and acetone. Optimum sensitivity
for ethanol was obtained at 140
0
C - 160
0
C temperature range.
Citation:
Udaraka, M.P.S.D., Nanayakkara, H.A.T.V., Attygalle, D., & Amarasinghe, D.A.S. (2017). Development of metal oxide based solid state gas sensor platform
[Abstract]. In V. Sivahar (Ed.), Leveraging materials for a smart future (p. 5). Society of Mechanical Engineering Students, Department of Materials Science and Engineering, University of Moratuwa.
