Analysis of hysteresis characteristics of fabricated SiNW biosensor in aqueous environment with reference electrode

A silicon nanowire field effect transistor (SiNW FET) was fabricated through the fabrication method compatible with that of MOSFET including back-end process without lift-off process. However, when it is working in an aqueous solution, the SiNW device as well as other transducer devices has various inherent instability problems such as hysteresis characteristics. We observed the hysteresis in DI water (DW) and confirmed that it is caused by mobile ion effect in DW with various experimental results.