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


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.

Publication DOI: https://doi.org/10.1016/j.protcy.2017.04.116
Divisions: College of Health & Life Sciences
Additional Information: © 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.
Uncontrolled Keywords: graphene,reduced graphene oxide,impedimetric biosensor,interdigitated electrode array,electroless nickel deposition
Publication ISSN: 2212-0173
Full Text Link: http://linkingh ... 212017317301172
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PURE Output Type: Article
Published Date: 2017-07-13
Published Online Date: 2017-07-13
Accepted Date: 2017-04-17
Authors: Popescu, Sinziana (ORCID Profile 0000-0002-5441-1492)
Dale, Carl
Keegan, Neil
Ghosh, Biswajit
Kaner, Richard
Hedley, John

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