An ultrasensitive and selective electrochemical biosensor for Escherichia coli based on bacteria-imprinted polydopamine and a magnetic nanocomposite modifier.

ABSTRACT: This study developed an electrochemical biosensor utilizing a polydopamine film for the highly selective, ultrasensitive, and efficient determination of E. coli. A nanocomposite containing a magnetic graphene oxide-ionic liquid-palladium (MGO-IL-Pd) was synthesized and used as a chemical modifier to create a modified glassy carbon electrode (MGCE). Subsequently, dopamine was deposited on the GCE as a monomer during the electropolymerization process to prepare a bacteria imprinted polymer (BIP). After removing the E. coli as a template, the MGCE was employed for detecting the bacteria. The electrochemical performance of the BIP-based sensor was studied through square wave voltammetry (SWV) and cyclic voltammetry (CV). When E. coli was introduced, a significant current shift was observed, in

SUBMITTER: Gorjizadeh Kohvade A 

PROVIDER: S-EPMC12749742 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature