Abstract

Inspired by the possibility of controlling the respiration of micro-organisms, we present a bio-inspired reference electrode, demonstrating a stable potential for extended period of time. The bio-inspired reference electrode, made of platinum, sits in a microfluidic chamber for growing specific micro-organisms, Geobacter sulfurreducens, which is an exoelectrogen capable of transferring electrons outside its outer membrane to complete its respiration process. Open circuiting the reference electrode forces exoelectrogens on the electrode unable to transfer electrons to the electrode to complete the respiration process. This will set the reference potential to be the open circuit potential of the anolyte, sodium acetate, which is ~ -0.5 V versus the Ag/AgCl in 3M NaCl. The bio-inspired reference electrode maintained its potential stability of ±1.07 mV/day for over a week. The bio-inspired reference electrode was integrated in a MEMS microbial fuel cell (MFC) to characterize its electrochemical characteristics, including polarization, voltammetry, and electrochemical impedance spectroscopy.

Original languageEnglish (US)
Title of host publication2016 Solid-State Sensors, Actuators and Microsystems Workshop, Hilton Head 2016
EditorsMark G. Allen, Tina Lamers
PublisherTransducer Research Foundation
Pages290-293
Number of pages4
ISBN (Electronic)9781940470023
DOIs
StatePublished - Jan 1 2016
Event2016 Solid-State Sensors, Actuators and Microsystems Workshop, Hilton Head 2016 - Hilton Head, United States
Duration: Jun 5 2016Jun 9 2016

Publication series

Name2016 Solid-State Sensors, Actuators and Microsystems Workshop, Hilton Head 2016

Conference

Conference2016 Solid-State Sensors, Actuators and Microsystems Workshop, Hilton Head 2016
CountryUnited States
CityHilton Head
Period6/5/166/9/16

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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  • Cite this

    Ren, H., Torres, C. I., & Chae, J. (2016). A bio-inspired reference electrode: Regulating the respiration of micro-organisms. In M. G. Allen, & T. Lamers (Eds.), 2016 Solid-State Sensors, Actuators and Microsystems Workshop, Hilton Head 2016 (pp. 290-293). (2016 Solid-State Sensors, Actuators and Microsystems Workshop, Hilton Head 2016). Transducer Research Foundation. https://doi.org/10.31438/trf.hh2016.79