STRETCHABLE GLUCOSE SENSOR VIA CONJUGATED POLYMER CONFORMALLY-COATED CNT ELECTRODES PARTIALLY EMBEDDED IN PDMS

Anthony Palumbo, Chenguang Zhao, Hongjun Wang, Kalle Levon, Eui Hyeok Yang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents a stretchable glucose sensor composed of dodecylbenzenesulfonate-doped polypyrrole (PPy(DBS))-coated vertically aligned carbon nanotube (VACNT) forests partially embedded in a polydimethylsiloxane (PDMS) substrate. VACNTs are grown via chemical vapor deposition (CVD) and transferred onto partially cured PDMS. A conformal PPy(DBS) layer is electropolymerized on the nanotubes to create PPy(DBS)-coated VACNTs. Next, dip-coating is performed in glucose oxidase (GOx) solution to immobilize GOx with glutaraldehyde (GA) as a crosslinking agent onto the PPy(DBS) surface. The PDMS/CNT/PPy(DBS)/GOx is exposed to varying glucose concentrations to measure its amperometric response. The sensor exhibits a sensitivity of 10 mA cm-2 M-1, a linear range of 0.1 mM to 12 mM, and a response time shorter than 5 seconds. Strain is applied to the sensor device, demonstrating its stable sensing function up to 75% strain and with coefficients of determination large than 0.975.

Original languageEnglish
Title of host publication2022 Solid-State Sensors, Actuators and Microsystems Workshop, Hilton Head 2022
EditorsReza Ghodssi, Jenna F. Chan
Pages324-327
Number of pages4
ISBN (Electronic)9781940470047
StatePublished - 2022
Event2022 Solid-State Sensors, Actuators and Microsystems Workshop, Hilton Head 2022 - Hilton Head, United States
Duration: 5 Jun 20229 Jun 2022

Publication series

Name2022 Solid-State Sensors, Actuators and Microsystems Workshop, Hilton Head 2022

Conference

Conference2022 Solid-State Sensors, Actuators and Microsystems Workshop, Hilton Head 2022
Country/TerritoryUnited States
CityHilton Head
Period5/06/229/06/22

Keywords

  • Flexible electrode
  • carbon nanotubes
  • electrochemical sensing
  • glucose sensor
  • polypyrrole

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