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Influence of lasing parameters on the morphology and electrical resistance of polyimide-based laser-induced graphene (LIG)

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2023, 33(2), pp.587-595
  • DOI : 10.1007/s42823-022-00447-2
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : October 9, 2022
  • Accepted : December 9, 2022
  • Published : March 1, 2023

de la Roche Jhonattan 1 López-Cifuentes Isabella 1 Jaramillo-Botero Andres 1

1OMICAS Alliance, Pontificia Universidad Javeriana

Accredited

ABSTRACT

Laser-induced graphene (LIG) uses a CO2 infrared laser scriber for transforming specific polymer substrates into porous graphene. This technique is simple, scalable, low-cost, free of chemicals, and produces a 3D graphene for applications across many fields. However, the resulting 3D graphene is highly sensitive to the lasing parameters used in their production. Here, we report the effects of power, raster speed, number of lasing passes (with and without spot overlapping) on the resulting LIG structure, morphology, and sheet resistance, using a polyimide (PI) substrate. We find that the number of lasing passes, laser spot overlapping and brand of PI used had a strong influence on the quality of the LIG, measured in terms of the IG/ID and I2D Raman bands and sheet resistance. Increasing number of passes and overlapping of laser spots led to increased LIG pore sizes, larger graphene scales, and reduced sheet resistance. Furthermore, the over-the-counter desktop CO2 laser engraving unit used introduced additional restrictions that limited the quality of the LIG produced, particularly due to inconsistent control of the laser scribing speed and a poor thermal management of the laser unit.

Citation status

* References for papers published after 2022 are currently being built.