Conductive Composite Microneedle Sensors Based on Cellulose Acetate Phthalate: Investigating Performance and Biodegradability

Amy Devine, Ellen Hegarty, Catherine Hegarty, James Davis

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Abstract

Conductive microneedle patches based on carbon nanoparticle composites in which cellulose acetate phthalate
(CAP) or polystyrene (PS) acted as a binder were investigated. The electrochemical properties of the composite system
were assessed using ferrocyanide as a redox probe and compared with screen printed carbon electrodes. Preliminary
investigations of biodegradability were conducted with the influence of soil interment assessed by electron microscopy.
While the PS microneedles exhibited no breakdown, the CAP systems were found to be substantially degraded after one
week with complete removal of the needle tips and, hence, piercing capability
Original languageEnglish
Article number2000404
Pages (from-to)1-4
Number of pages4
JournalIEEE Sensors Letters
Volume7
Issue number3
Early online date15 Feb 2023
DOIs
Publication statusPublished online - 15 Feb 2023

Bibliographical note

Funding Information:
This work was supported by the Department for the Economy Northern Ireland.

Publisher Copyright:
© 2017 IEEE.

Keywords

  • Electrical and Electronic Engineering
  • Instrumentation
  • microneedle
  • electrode
  • biodegradable
  • composite
  • sensor
  • Sensor materials

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