▎ 摘　　要

NOVELTY - The sensor (10) has an encasement (21) formed on an exposed surface of a channel region (15), where the channel region comprises nanomaterial. The encasement is formed with an inlet to receive analyte of interest. A serpentine shaped flow channel guides the analyte of interest across the exposed surface of the channel region. A measurement circuit is electrically coupled between a source electrode (13) and a drain electrode (14) and operated to measure change in direct current (DC) between the source electrode and the drain electrode, where magnitude of DC change is indicative of quantity of the analyte. A drive source is electrically coupled to a gate electrode (17) to apply DC voltage, where the nanomaterial is graphene. USE - DC nanoelectronic sensor for a sensing system (claimed). Can also be used in environmental protection, industrial safety and biomedicine applications. ADVANTAGE - The sensor has high surface-to-volume ratio, carrier mobility, carrier compatibility, low power consumption, chemical robustness and convenient to electrical readout, and improves reversible performance by real-time monitoring rapid molecular physisorption behavior and allows a detection signal to unveil true interaction between molecules and the graphene. DESCRIPTION OF DRAWING(S) - The drawing shows a top perspective view of a DC nanoelectronic sensor. 10DC nanoelectronic sensor 13Source electrode 14Drain electrode 15Channel region 17Gate electrode 21Encasement