Presentation Information
[3C01【招待講演】]Nanoscale Graphene Device Technology for Extreme Sensing
*Hiroshi Mizuta1,2,3 (1. Japan Advanced Institute of Science and Technology, 2. University of Southampton, 3. OTOWA ELECTRIC CO., LTD.)
Graphene is a promising platform for extreme sensing applications thanks to its excellent electronic characteristics such as high carrier mobility and low noise. In this talk, a graphene nano-electro-mechanical (GNEM) van der Waals switches are first presented, featuring sub-thermal switching with SS as small as 10.4 mV/dec at room temperature. Various nanoscale graphene sensors are then demonstrated. With the resistance detection method, quantized increments in the temporal resistance were observed, signifying single CO2 molecule adsorption. As for the mass detection method, the resonance frequency shift of a doubly-clamped graphene resonator was observed successfully with the zeotpgram (10-21 g)/Hz-level mass responsibility. In addition, recent attempts are discussed on applying graphene nanosensors to detect faint signals from nature such as a very low electric field (< 100 V/m) in the atmosphere towards novel lightning forecast technology.