Comprehensive Investigation of Structural and Optical Properties of Spin-Coated Reduced Graphene Oxide Thin Films
Author(s): Jayesh Suresh Jadhav, Narendra Uttamrao Patil, Dnyaneshwar Daulatrao Lokhande
Publication #: 2601014
Date of Publication: 20.01.2026
Country: India
Pages: 1-10
Published In: Volume 12 Issue 1 January-2026
Abstract
Reduced graphene oxide (rGO) thin films were successfully fabricated using a sol–gel-assisted spin-coating technique and thermal reduction. In this work, a comprehensive investigation of the structural and optical properties of spin-coated rGO thin films was carried out to understand the influence of the reduction process on film characteristics. Field Emission Scanning Electron Microscopy (FESEM) revealed a uniform, wrinkled, and layered sheet-like morphology with interconnected rGO flakes, indicating the formation of a continuous thin film. Energy Dispersive X-ray (EDX) analysis confirmed carbon as the dominant constituent with a significantly reduced oxygen content, verifying the effective reduction of graphene oxide. X-ray Diffraction (XRD) analysis showed a broad (002) diffraction peak corresponding to graphitic carbon, confirming partial restoration of the sp²-hybridized structure with crystallite size of 53.65 nm. Optical studies using UV–Visible spectroscopy exhibited strong absorption in the ultraviolet region with a red-shifted π–π* transition, indicating enhanced electronic conjugation in rGO. Fourier Transform Infrared (FTIR) spectroscopy demonstrated the substantial removal of oxygen-containing functional groups after thermal reduction, while Raman spectroscopy revealed prominent D and G bands, confirming defect-induced disorder and the presence of few-layer rGO sheets. The combined structural and optical analyses confirm the successful synthesis of rGO thin films with desirable properties, making them suitable for potential applications in optoelectronic devices, sensors and energy-related technologies.
Keywords: Reduced graphene oxide; Spin coating; optical analyses; optoelectronic; technologies.
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