Polydopamine-immobilized yeast cells for portable electrochemical biosensors applied in environmental copper sensing

Ohiemi Benjamin Ocheja, Ehthisham Wahid, Jefferson Honorio Franco, Massimo Trotta, Cataldo Guaragnella, Enrico Marsili, Nicoletta Guaragnella, Matteo Grattieri

Research output: Journal PublicationArticlepeer-review

1 Citation (Scopus)


The coupling of biological organisms with electrodes enables the development of sustainable, low cost, and potentially self-sustained biosensors. A critical aspect is to obtain portable bioelectrodes where the biological material is immobilized on the electrode surface to be utilized on demand. Herein, we developed an approach for the rapid entrapment and immobilization of metabolically active yeast cells in a biocompatible polydopamine layer, which does not require a separate and time-consuming synthesis. The reported approach allows obtaining the “electrical wire” of intact and active yeast cells with resulting current generation from glucose oxidation. Additionally, the electrochemical performance of the biohybrid yeast-based system has been characterized in the presence of CuSO4, a widely used pesticide, in the environmentally relevant concentration range of 20–100 μM. The system enabled the rapid preliminary monitoring of the contaminant based on variations in current generation, with a limit of detection of 12.5 μM CuSO4. The present approach for the facile preparation of portable yeast-based electrochemical biosensors paves the way for the future development of sustainable systems for environmental monitoring.

Original languageEnglish
Article number108658
Publication statusPublished - Jun 2024
Externally publishedYes


  • Chronoamperometry
  • Copper
  • Cyclic voltammetry
  • Electrochemical biosensors
  • Polydopamine
  • Yeast biosensors

ASJC Scopus subject areas

  • Biophysics
  • Physical and Theoretical Chemistry
  • Electrochemistry


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