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Abstract <p>The rare-earth element, neodymium, was added in measured concentrations to graphene oxide (GO). Initially, the base material, GO, was prepared utilizing modified version of the Hummers method, and resulting composites underwent various characterization techniques. The sample morphologies were examined using transmission and scanning electron microscopy (TEM and SEM) techniques. Through X-ray diffraction (XRD) studies and indexing of rings in selected area electron diffraction (SAED) pattern, crucial information was gathered regarding the composite structure. Atomic proportions in the composite and elemental stoichiometric ratios were analyzed utilizing energy-dispersive X-ray analysis (EDAX). Confocal Raman spectral images of materials offered insights into the stability and atomic-level band transitions. UV-Vis reflectance spectra helped figure out the material’s optical band gap values. The Mott variable range hopping conduction model was applied in this study to investigate the activation enthalpy and hopping parameters. The synthesized GO composite showed that it could be a promising candidate for a semiconducting compound and may prove beneficial in catalytic applications.</p>

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Mott-type Variable Range Hopping in Neodymium-doped Graphene Oxide Nanocomposites

  • 期刊论文

  • 发表日期：

    2025年9月16日

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  • Nikhila Ann Abraham,
  • Dhanya I,
  • Sreejith K Pisharady

摘要

Abstract

The rare-earth element, neodymium, was added in measured concentrations to graphene oxide (GO). Initially, the base material, GO, was prepared utilizing modified version of the Hummers method, and resulting composites underwent various characterization techniques. The sample morphologies were examined using transmission and scanning electron microscopy (TEM and SEM) techniques. Through X-ray diffraction (XRD) studies and indexing of rings in selected area electron diffraction (SAED) pattern, crucial information was gathered regarding the composite structure. Atomic proportions in the composite and elemental stoichiometric ratios were analyzed utilizing energy-dispersive X-ray analysis (EDAX). Confocal Raman spectral images of materials offered insights into the stability and atomic-level band transitions. UV-Vis reflectance spectra helped figure out the material’s optical band gap values. The Mott variable range hopping conduction model was applied in this study to investigate the activation enthalpy and hopping parameters. The synthesized GO composite showed that it could be a promising candidate for a semiconducting compound and may prove beneficial in catalytic applications.