Novel approach for modification of graphene oxide using continuous wave-laser obtained from surgical laser diode

Abstract

The present investigation employs a modified version of Hummer's method to synthesise graphene oxide (GO), which is subsequently subjected to treatment with a continuous-wave (CW) laser derived from surgical laser diodes for the purpose of performing minimally invasive surgery for 30 s to yield laser-modified GO. XRD analysis was used to look at how CWlaser changed the sizes of crystallites, the distance between planes, and the average number of layers. The study examined the FTIR spectra of graphite oxidation and modification using a CW laser. Changes in the G band, D band, and 2D peaks in the Raman spectra showed disorder and multiple layers. The variations in negative zeta potential were used to analyse colloidal stability in graphite, GO, and laser-modified GO. Different types of dynamic light scattering techniques were used to study electrophoretic mobility, Brownian motion, and electrical double layers. The obtained results exhibited a high degree of agreement with the findings derived from the FTIR spectra. This work examined dielectric and impedance spectroscopy to assess relaxation behaviour that deviates from the Debye model. By fitting curves to the data, we evaluated the dielectric constant, loss, and conductivity. Graphite to laser-modified GO via GO lowered the real component of the dielectric constant at any frequency.