Glucose sensing with graphene varactors

Yao Zhang, Rui Ma, Yogish C. Kudva, Philippe Buhlmann, Steven Koester

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A novel metal-oxide-graphene glucose sensor is demonstrated. The sensor utilizes a graphene variable capacitor (varactor) structure that has the capability to enable passive, wireless sensing, a key advantage for in vivo glucose sensing. The functionalization of graphene using pyrene boronic acid is demonstrated using a self-assembly process, and successful functionalization is demonstrated by a positive Dirac voltage shift. The varactors are shown to be operational in a phosphate buffered saline solution and show stable performance after multiple measurement cycles. Finally, a consistent and reversible response to 100 mg/dL glucose is demonstrated.

Original languageEnglish (US)
Title of host publicationIEEE Sensors, SENSORS 2016 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479982875
StatePublished - Jan 5 2017
Event15th IEEE Sensors Conference, SENSORS 2016 - Orlando, United States
Duration: Oct 30 2016Nov 2 2016


Other15th IEEE Sensors Conference, SENSORS 2016
CountryUnited States


  • glucose
  • graphene
  • quantum capacitance
  • varactor

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    Zhang, Y., Ma, R., Kudva, Y. C., Buhlmann, P., & Koester, S. (2017). Glucose sensing with graphene varactors. In IEEE Sensors, SENSORS 2016 - Proceedings [7808854] Institute of Electrical and Electronics Engineers Inc..