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.

KEYWORDS:

• Graphene oxide
• laser
• hydrodynamic diameter
• zeta potential
• polarisation

Acknowledgements

The authors express their gratitude to Central Instrumentation Facility, OUAT, Bhubaneswar for conducting sample characterisation including FT-IR analysis and zeta potential measurement.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

All datas will be available upon request.

Additional information

Notes on contributors

Dipak Kumar Sahoo

Dipak Kumar Sahoo is a research scholar in GIET University, Gunupur, Odisha.

Biswajit Dalai

Dr Biswajit Dalai is working as Assistant prof, Physics, GIET University, Gunupur, Odisha. The research topic he focuses are dielectrics, NMR and ultrasonics.

Arun Kumar Mohanty

Dr Arun Kumar Mohanty is working as Associate prof, department of endocrine surgery, SCB Medical College, Cuttack, Odisha. He is having vast experience in laser assisted surgery.

Chhatrapati Parida

Dr Chhatrapati Parida is working as Assistant prof in Physics, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha. His research focuses on the modification of Graphene oxide utilizing various techniques such as laser, electron beam, X-rays and plasma, fabrication of super hydrophobic thin film and synthesis of green biodegradable materials.