Abstract

The paper report a unique biologically inspired electro-chemical reference electrode based on regulating the breathing of bacteria. Some species of bacteria, named exoelectrogen, have the capability of extracellular electron transfer, which is the transfer of electrons to a solid electron acceptor outside their membrane. We find that it sets the solid electron acceptor at a stable electrochemical potential, which can be used as reference electrode. We pattern thin film platinum as electron acceptor and grow exoelectrogenic biofilm on it. By performing colorimetric analysis of the individual ions in the anolyte solution, we confirmed that the potential of the reference electrode, ∼ -0.5 V versus the Ag/AgCl in 3M NaCl, arises from the electrochemical potential of the reaction. The biologically-inspired reference electrode demonstrates a stability of ±4.2 mV/day for two days. It is integrated in a MEMS microbial fuel cell (MFC) to characterize its electrochemical characteristics.

Original languageEnglish (US)
Title of host publication2017 IEEE 30th International Conference on Micro Electro Mechanical Systems, MEMS 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages354-357
Number of pages4
ISBN (Electronic)9781509050789
DOIs
StatePublished - Feb 23 2017
Event30th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2017 - Las Vegas, United States
Duration: Jan 22 2017Jan 26 2017

Other

Other30th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2017
CountryUnited States
CityLas Vegas
Period1/22/171/26/17

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

Ren, H., Torres, C., Zhang, Z., & Chae, J. (2017). A biologically-inspired electro-chemical reference electrode. In 2017 IEEE 30th International Conference on Micro Electro Mechanical Systems, MEMS 2017 (pp. 354-357). [7863414] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MEMSYS.2017.7863414