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      https://www.ias.ac.in/article/fulltext/boms/044/0121

    • Keywords

       

      Carbon nanotubes; UV–visible spectroscopy; optical bandgap; absorption; conducting polymer.

    • Abstract

       

      In this study, the effect of multi-walled carbon nanotubes (MWCNTs) addition on optical bandgap ofpolyaniline (PANI) was reported. Pure PANI and 5 mg MWCNTs/PANI, 10 mg MWCNTs/PANI and 15 mg MWCNTs/PANI composite samples were synthesized by in-situ polymerization process. Synthesized composite sample and pure PANI sample were characterized by X-ray diffraction, scanning electron microscopy, Fourier transform-infrared and UV–visible spectroscopy. Optical bandgap, molar absorptivity coefficient are estimated for pristine MWCNTs sample, purePANI sample and composite samples using UV–visible spectroscopy data and Tauc plot. It is observed that optical bandgap of PANI decreases on increasing the concentration of MWCNTs, while keeping the concentration of PANI constant. Lowest bandgap of 3.55 eV is obtained for 15 mg MWCNTs/PANI composite sample. Strong interaction between ${\pi}$-bonded surface of MWCNTs and quinoid rings of PANI is found, as indicated by the obtained results of FTIR and UV–visible spectroscopy. The information on the optical bandgap of the composite samples is of great importance for the development of optical antenna and other optoelectronic devices.

    • Author Affiliations

       

      ATUL KUMAR SHARMA1 ANUP KUMAR SHARMA2 RITU SHARMA1

      1. ECE Department of Malviya National Institute of Technology, Jaipur 302017, India
      2. EIE Department, National Institute of Technology, Silchar 788010, India
    • Dates

       
  • Bulletin of Materials Science | News

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      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

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      Posted on July 25, 2019

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