Laser induced graphene sensors for assessing pH: Application to wound management

Robert Barber, Sarah Cameron, Amy Devine, Andrew McCombe, L. Kirsty Pourshahidi, Jill Cundell, Souradeep Roy , A Mathur, Charnete Casimero, P Papakonstantinou, J Davis

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)
154 Downloads (Pure)


The laser-induced modification of polyimide substrates to yield conductive graphitised tracks sensitive to the solution pH is investigated. The influence of laser output and operating characteristics on the surface morphology
and the consequential impact on electrochemical properties have been evaluated. Several sensor formats have been pursued using both potentiometric and voltammetric methodologies and found to provide a stable means of determining pH. While the potentiometric system was found to provide sub-Nernstian responses, the voltammetric system employing a riboflavin (vitamin B2) redox probe was found to exhibit classic Nernstian profiles (56 mV/pH). The versatility of the laser patterning on polyimide is shown to yield a mechanically flexible double-sided probe that could be suitable for use in a wide variety of clinical applications.
Original languageEnglish
Article number106914
Pages (from-to)1-6
Number of pages6
JournalElectrochemistry Communications
Early online date5 Jan 2021
Publication statusPublished (in print/issue) - 28 Feb 2021

Bibliographical note

Funding Information:
The authors acknowledge financial support from the European Union’s INTERREG VA Programme, managed by the Special EU Programmes Body (SEUPB), the Department for the Economy (DfE) Northern Ireland, Kimal PLC, Abbott Diabetes Care Inc. and the British Council UKIERI (DST 65/2017).

Publisher Copyright:
© 2021 The Authors

Copyright 2021 Elsevier B.V., All rights reserved.


  • Electrodes
  • Laser induced graphene
  • LIG
  • pH
  • riboflavin
  • wound
  • Riboflavin
  • Wound


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