Laser-induced graphene on cross-linked sodium alginate

T Vićentić; I Greco; C S Iorio; V Mišković; D Bajuk-Bogdanović; I A Pašti; K Radulović; S Klenk; T Stimpel-Lindner; G S Duesberg; M Spasenović

doi:10.1088/1361-6528/ad143a

Laser-induced graphene on cross-linked sodium alginate

Nanotechnology. 2023 Dec 29;35(11). doi: 10.1088/1361-6528/ad143a.

Authors

T Vićentić¹, I Greco², C S Iorio², V Mišković³, D Bajuk-Bogdanović⁴, I A Pašti⁴, K Radulović¹, S Klenk⁵, T Stimpel-Lindner⁵, G S Duesberg⁵, M Spasenović¹

Affiliations

¹ Center for Microelectronic Technologies, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Belgrade, Serbia.
² Center for Research and Engineering in Space Technologies (CREST), Universite Libre de Bruxelles, Bruxelles, Belgium.
³ Nearlab, Department of Electronics, Information, and Bioengineering, Politecnico di Milano, Milano, Italy.
⁴ University of Belgrade-Faculty of Physical Chemistry Belgrade, Serbia.
⁵ Institute of Physics, EIT 2, Faculty of Electrical Engineering and Information Technology, University of the Bundeswehr Munich & SENS Research Center, Neubiberg, Germany.

PMID: 38081076
DOI: 10.1088/1361-6528/ad143a

Abstract

Laser-induced graphene (LIG) possesses desirable properties for numerous applications. However, LIG formation on biocompatible substrates is needed to further augment the integration of LIG-based technologies into nanobiotechnology. Here, LIG formation on cross-linked sodium alginate is reported. The LIG is systematically investigated, providing a comprehensive understanding of the physicochemical characteristics of the material. Raman spectroscopy, scanning electron microscopy with energy-dispersive x-ray analysis, x-ray diffraction, transmission electron microscopy, Fourier-transform infrared spectroscopy and x-ray photoelectron spectroscopy techniques confirm the successful generation of oxidized graphene on the surface of cross-linked sodium alginate. The influence of laser parameters and the amount of crosslinker incorporated into the alginate substrate is explored, revealing that lower laser speed, higher resolution, and increased CaCl₂content leads to LIG with lower electrical resistance. These findings could have significant implications for the fabrication of LIG on alginate with tailored conductive properties, but they could also play a guiding role for LIG formation on other biocompatible substrates.

Keywords: alginate; biocompatible materials; graphene characterization; graphene synthesis; laser-induced graphene; nanobiotechnology.

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