Prof. Navakanta Bhat of Indian Institute of Science Bangalore

Integration of gas sensors on back end of the line CMOS process requires, highly sensitive low temperature processed materials as receptors. 2D materials are very attractive in this context, given their high surface to volume ratio. They would potentially enable gas sensing without the need for integrated micro heater for providing activation energy, as in conventional metal oxide sensors. Among the 2D materials family, the Transition Metal Dichalcogenides (TMD) offer interesting opportunities for application in chemi-resistive gas sensors. Along with high surface to volume ratio, an ideal characteristic for surface adsorption driven gas sensing phenomenon, TMDs lend themselves for wide range of tunability of other important parameters such as bandgap and conductivity. In order to build CMOS compatible gas sensors for system-on-chip applications, liquid exfoliation of 2D TMD materials can be exploited for room temperature synthesis of sensing material on top of CMOS platform. In this talk, we will present high performance gas sensors realized using few layer WS2 and WSe2 for NH3 and H2S gases respectively.

Biography:

Dr. Navakanta Bhat received his Ph.D. in Electrical Engineering from Stanford University, Stanford, CA in 1996. Then he worked at Motorola’s Networking and Computing Systems Group under Advanced Products R&D Lab (APRDL) in Austin, TX until 1999. He joined the Indian Institute of Science, Bangalore in 1999 where he is currently a Professor and Chair, Centre for Nano Science and Engineering. His current research is focused on Nanoelectronics device technology, Biosensors for point of care diagnostics and Gas sensors for pollution monitoring. He has over 300 research publications in international journals and conferences and over 30 US patents to his credit. He is an elected Fellow of the Indian National Academy of Engineering and elected Fellow of IEEE. He has received several awards for his research achievements, including the prestigious Infosys Prize (2018) for contributions in Enegineering and Computer Science. He is a member of the Board of Governors of the IEEE Electron Devices Society and also the Chair of Nanotechnology technical committee. He is a Distinguished Lecturer of the IEEE Electron Devices Society. He is the founder and promoter of a startup company, PathShodh Healthcare Pvt Ltd (www.pathshodh.com).   Based on his group’s research in biosensors, PathShodh has developed the first of its kind multi-analyte point-of-care diagnostic device for 5 blood tests and 3 urine tests, related to multiple chronic diseases including diabetes and its complications, anemia and malnutrition, kidney and liver diseases. For this technology, PathShodh has received multiple recognitions.

Address:Indian Institute of Science, Bangalore, Bangalore, India