Tracking biofilms using an electrochemical quartz crystal microbalance

Interest in electrochemically active biofilms (EABs) ranges from their function as bioanodes and biocathodes in microbial fuel cells, to new types of biosensors as well as novel biosynthesis of sustainable chemicals. In this application note, Gamry instruments details the tracking of Geobacter sulfurreducens, biofilm growth with an electrochemical quartz crystal microbalance (eQCM). The eQCM provided an unprecedented amount of information about the native state of electrode-respiring G. sulfurreducens biofilms in relation to their initial attachment, growth, and oxidation state.