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

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Abstract

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)106914
Number of pages6
JournalElectrochemistry Communications
Volume123
Early online date5 Jan 2021
DOIs
Publication statusPublished - 28 Feb 2021

Keywords

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

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