LASER-INDUCED GRAPHENE ON PDMS WITH GLYCOL COMPOUNDS AS A POTENTIAL WEARABLE SENSOR

Authors

  • Anđela Gavran Center for Microelectronic Technologies, Institute of Chemistry, Technology and Metallurgy, National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
  • Marija Pergal Center for Microelectronic Technologies, Institute of Chemistry, Technology and Metallurgy, National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
  • Teodora Vićentić Center for Microelectronic Technologies, Institute of Chemistry, Technology and Metallurgy, National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
  • Igor Pašti University of Belgrade – Faculty of Physical Chemistry, Belgrade, Serbia; Serbian Academy of Sciences and Arts, Belgrade, Serbia
  • Danica Bajuk-Bogdanović University of Belgrade – Faculty of Physical Chemistry, Belgrade, Serbia
  • Marko Spasenović Center for Microelectronic Technologies, Institute of Chemistry, Technology and Metallurgy, National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia

DOI:

https://doi.org/10.7251/COMEN2601038G

Abstract

Laser-induced graphene (LIG) has been the subject of extensive research over the past decade and has found promising applications in physiological monitoring processes in both sports and medicine. Its excellent characteristics, such as good electrical conductivity, piezoresistivity, flexibility, and low-cost production, make it a suitable material for use in wearable electronics and sensors. Poly(dimethylsiloxane) (PDMS) has attracted attention as a substrate for wearable sensors due to its good biocompatibility, elasticity, and mechanical characteristics. However, since its structure contains no readily carbonizable atoms, PDMS must be modified with glycol additives such as diethylene glycol (PDMS/DEG) and ethylene glycol (PDMS/EG) to enable graphene induction. This paper presents the laser induction of graphene on a PDMS/DEG and PDMS/EG composite, electronic testing, and physicochemical characterization. By optimizing laser parameters, LIG with the lowest electrical resistance was obtained, with PDMS/DEG samples showing superior surface morphology compared to PDMS/EG. Raman spectroscopy revealed the characteristic D, G, and 2D bands typical for graphene. The assignment of bands in infrared spectroscopy (FTIR) and SEM micrographs confirmed the structure of graphene. Characterization revealed that the optimal glycol compound concentration in PDMS is 20 wt.%. In the future, this material has the potential to be used for measuring physiological processes and limb movements.
Keywords: laser-induced graphene, PDMS, sensors, diethylene glycol, ethylene glycol.

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Published

2026-04-29

Issue

Vol. 17 No. 1 (2026): Contemporary Materials XVII‒1

Section

Articles