IMNS Seminar Series: Resonant Gate Transistors and MEMS/CMOS Integration for Electrochemical Imaging

Talk 1:   ASAAD AL-MASHAAL - Development of Micro/Nano Systems for Sensing Applications

The talk will highlight the development of a resonant gate transistor (RGT) device for sensing applications. An ultra-thin-membrane of 2D material or microstructure of tantalum metal is integrated with MOSFET to function as a vibrating mechanical component in the (RGTs). The design of our (RGT) devices would have the advantage of mimicking the human cochlear response by transducing mechanical oscillations from the resonator components (graphene and tantalum) into electrical signals. The main advantage of such a sensor would provide electromechanical filtering and sensing system for detecting dominant acoustic frequencies. This talk will outline the design, fabrication and characterisation of suspended structures of tantalum beams and graphene membranes.

Talk 2:    CHANDRASEKARAN GUNASEKARAN - Micro/nano-scale electrode arrays with active CMOS circuits for 2D electrochemical imaging

Energy conversion devices such as fuel cells make use of thin films and functional materials that exhibit spatial heterogeneity in their behaviour. The link between the distribution of such irregularities and the impact on device performance is not well established. Hence, there is a need to be able to electrochemically map the activity on a range of thin films and functional materials. Existing high resolution electrochemical and current mapping techniques over large area (cm scale) are very slow and hence there is a need to perform spatial electrochemical mapping more rapidly. This project involves the design of “micro square nano-band edge electrode (MNEE)” or microelectrode arrays with active CMOS circuits on a single silicon CMOS chip, thus producing an integrated sensor system with active matrix readout capability.