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

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Abstract

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.

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Original languageEnglish
Pages (from-to)274-276
JournalProcedia Technology
Volume27
Early online date13 Jul 2017
DOIs
Publication statusPublished - 13 Jul 2017

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

    Keywords

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

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