Two dimensional (2D) semiconductors such as transition metal dichalcogenides (TMDs) are layered materials that have gained interest for sensing and optoelectronic applications because of their unique properties including tunable electronic properties by surface states, high surface-to-volume ratio, and high absorption coefficient. This talk presents asymmetric geometry MoS2 diode-based biosensors for the detection of TNF-alpha, a proinflammatory cytokine and 2D semiconductors for the detection of volatile organic compounds. Monolayer MoS2 Field-effect-transistors fabricated at Forschungszentrum Jülich using the gold-assisted exfoliation technique are discussed for gas and odor sensing application.
Dr. Michael Adachi is an Associate Professor in the School of Engineering Science at Simon Fraser University (SFU), where he leads a team developing new gas sensors, biomarker sensors and electronic devices using scalable microelectronic fabrication methods. During his postdoctoral research at the University of Toronto, he developed colloidal quantum dot lasers and solar cells, and during his doctorate at the University of Waterloo he fabricated core-shell silicon nanowire solar cells. He is a recipient of the Michael Smith Health Research BC Scholar Award (2022-2027) and serves as an Associate Editor of ECS Sensors Plus, and is Chair of the IEEE Electron Device Vancouver Chapter. In September 2026, he is visiting the Chair of Materials Science and Nanotechnology as a Humboldt Research Fellow for experienced researchers to develop monolayer MoS2-based gas sensors.
Two dimensional (2D) semiconductors such as transition metal dichalcogenides (TMDs) are layered materials that have gained interest for sensing and optoelectronic applications because of their unique properties including tunable electronic properties by surface states, high surface-to-volume ratio, and high absorption coefficient. This talk presents asymmetric geometry MoS2 diode-based biosensors for the detection of TNF-alpha, a proinflammatory cytokine and 2D semiconductors for the detection of volatile organic compounds. Monolayer MoS2 Field-effect-transistors fabricated at Forschungszentrum Jülich using the gold-assisted exfoliation technique are discussed for gas and odor sensing application.
Dr. Michael Adachi is an Associate Professor in the School of Engineering Science at Simon Fraser University (SFU), where he leads a team developing new gas sensors, biomarker sensors and electronic devices using scalable microelectronic fabrication methods. During his postdoctoral research at the University of Toronto, he developed colloidal quantum dot lasers and solar cells, and during his doctorate at the University of Waterloo he fabricated core-shell silicon nanowire solar cells. He is a recipient of the Michael Smith Health Research BC Scholar Award (2022-2027) and serves as an Associate Editor of ECS Sensors Plus, and is Chair of the IEEE Electron Device Vancouver Chapter. In September 2026, he is visiting the Chair of Materials Science and Nanotechnology as a Humboldt Research Fellow for experienced researchers to develop monolayer MoS2-based gas sensors.
