Rapid Prototyping of a Low-cost Graphene-based Impedimetric Biosensor

Sinziana Popescu, Carl Dale, Neil Keegan, Biswajit Ghosh, Richard Kaner, John Hedley

Research output: Contribution to journalArticlepeer-review


This paper presents a preliminary investigation towards rapid prototyping of a low-cost biosensor based on reduced graphene oxide (rGO). The devices are fabricated via a laser scribing process and their functionality is demonstrated by their functionalization and subsequent immobilization of 7% bovine serum albumin (BSA). Non-faradaic electrochemical impedance spectroscopy (EIS) indicated a 33-42% decrease in impedance upon immobilization. An electroless nickel deposition process is demonstrated to enable electrical contacts to the device, with optimized plating conditions (pH, temperature) leading to a rGO-nickel contact resistance of 19 Ω/mm2.
Original languageEnglish
Pages (from-to)274-276
JournalProcedia Technology
Early online date13 Jul 2017
Publication statusPublished - 13 Jul 2017

Bibliographical note

© 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.


  • graphene
  • reduced graphene oxide
  • impedimetric biosensor
  • interdigitated electrode array
  • electroless nickel deposition


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