New gel-based system allows bacteria to act as bioelectrical sensors
Microbial bioelectronic sensors use living bacteria that can create an electrical signal in response to the presence of a target substance, or analyte. These types of sensors offer many advantages over other types of biosensors based on proteins and enzymes: The bacteria can perform multiple functions, survive in a variety of environments and even grow and regenerate for potential long-term use.
However, building devices using living bacteria poses several challenges. The mediators some bacteria use to send and receive electrons, creating the electric signal, can be swept away from the sensor by liquid environments ...