Capacitive Sensing in High-Speed Molecular Communication System: A Noninvasive Interface for Internet of Bio-Nano Things

Molecular communication (MC) is a prominent technique within the Internet of Bio-Nano Things (IoBNT), which aims to interconnect artificial and biological devices for pioneering healthcare applications. Despite its rapid advancements in theoretical study, the experimental development of MC is still in the infancy stage, and most existing testbeds require intruding hardware into the channel during the signal detection process, potentially harming the organism. Against this background, the noninvasive interface across the internal and external information exchange of organisms is of great necessity. Specifically, this work adopts a capacitive sensing mechanism to recover information from the sensed chemical signals. Our testbed demonstrates a notably higher transmission rate than previously reported noninvasive MC approaches, underscoring its potential to advance IoBNT research.