Title:
GRAPHENE BASED HYDROGEN GAS SENSOR

Speaker(s):
Nabihah Sihar, Dee Chang Fu, Mohd. Ambri Mohamed, Burhanuddin Yeop Majlis

Universiti Kebangsaan Malaysia, Institute of Microengineering and Nanoelectronics (IMEN), Bangi, Selangor, MALAYSIA
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Abstract:
Hydrogen gas is easily flammable at volume concentrations higher than 4%. Therefore, hydrogen gas sensor is one of the solution for measuring the concentration of hydrogen gas in its surrounding. Graphene has been proposed for the material of gas sensors because it has higher surface volume ratio, high conductivity and low signal to noise ratio due to the one atom thickness two-dimensional conjugated structures. The main purpose of this project is to implement a highly sensitive and stable hydrogen gas sensor with fast recovery time at room temperature. We are trying to compare the performance of sensors by using Plasma Enhanced Chemical Vapor Deposition (PECVD) graphene with the industrial Chemical Vapor Deposition (CVD) graphene. Here, high quality of PECVD graphene will be produced at low temperature. On the other hand, the combination of palladium (Pd) nanoparticles and graphene will be used to enhance the selectivity and sensitivity in gas-sensing characteristics. Finally, the sensor will be tested with various gases such as CO, NO, H₂ and C₄H₁₀ after the electrical characterization of device is done.