Role of Defects in the Band Gap Tailoring of Carbon Black


  • Elma Elizaba Mathew CHRIST (Deemed to be University), Bangalore, Karnataka, India
  • Manoj Balachandran CHRIST (Deemed to be University), Bangalore, Karnataka, India



Carbon Black, Band-Gap, Defects, Amorphous


With the rise in the need for cost-effective production of graphene-like systems, Carbon Black (CB) is found to be a potential candidate. This report presents the structural modification of Carbon Black (CB) subjected to hydrothermal exfoliation at various temperatures. X-ray diffraction (XRD) revealed the graphitic structure with a broad peak, indicating the amorphous nature regardless of the variation in temperatures. Raman spectroscopy revealed that defect intensity increased with the increase in temperature. The band-gaps are found to be 4eV, 2.95eV, 2.86eV and 2.21eV at the exfoliation temperatures 160⁰C,180⁰C,200⁰C and 220⁰C respectively exhibiting a lowering with rise in temperature.   


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2023-01-18 — Updated on 2023-01-18