Laser-induced graphene on cross-linked sodium alginate

Area of Science:

• Materials Science
• Nanotechnology
• Biomaterials

Background:

• Laser-induced graphene (LIG) offers valuable properties for diverse applications.
• Integration of LIG into nanobiotechnology requires formation on biocompatible substrates.
• Cross-linked sodium alginate is a promising biocompatible material.

Purpose of the Study:

• To report the formation of LIG on cross-linked sodium alginate.
• To comprehensively investigate the physicochemical characteristics of the resulting LIG.
• To explore the influence of fabrication parameters on LIG properties.

Main Methods:

• Laser-induced graphene (LIG) fabrication on cross-linked sodium alginate.
• Characterization using Raman spectroscopy, SEM-EDX, XRD, TEM, FTIR, and XPS.
• Systematic investigation of laser parameters (speed, resolution) and crosslinker concentration (CaCl2).

Main Results:

• Successful generation of oxidized graphene on cross-linked sodium alginate confirmed.
• Physicochemical properties of LIG were thoroughly analyzed.
• Lower laser speed, higher resolution, and increased CaCl2 content resulted in lower electrical resistance.

Conclusions:

• Demonstrated successful fabrication of LIG on a biocompatible alginate substrate.
• Established a correlation between processing parameters and electrical conductivity of LIG.
• Findings provide a pathway for creating LIG with tunable conductivity on alginate and other biocompatible materials for nanobiotechnology.