A Glucose Biosensor Using CMOS Potentiostat and Vertically Aligned Carbon Nanofibers

Khandaker A. Al Mamun, Syed K. Islam, Dale K. Hensley, Nicole McFarlane

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

This paper reports a linear, low power, and compact CMOS based potentiostat for vertically aligned carbon nanofibers (VACNF) based amperometric glucose sensors. The CMOS based potentiostat consists of a single-ended potential control unit, a low noise common gate difference-differential pair transimpedance amplifier and a low power VCO. The potentiostat current measuring unit can detect electrochemical current ranging from 500 nA to 7 μA from the VACNF working electrodes with high degree of linearity. This current corresponds to a range of glucose, which depends on the fiber forest density. The potentiostat consumes 71.7 μW of power from a 1.8 V supply and occupies 0.017 μm2 of chip area realized in a 0.18 μm standard CMOS process.

Original languageEnglish
Article number7497511
Pages (from-to)807-816
Number of pages10
JournalIEEE Transactions on Biomedical Circuits and Systems
Volume10
Issue number4
DOIs
StatePublished - Aug 2016

Keywords

  • Amperometry
  • glucose monitoring
  • potentiostat
  • transimpedance amplifier
  • vertically aligned carbon nanofibers

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