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<p>In this work, the optical behavior of N-(4-Methoxybenzylidene)-4-butylaniline (MBBA) nematic liquid crystals doped with carbon nanotubes has been studied. The optical characteristics of pure LC and LC doping with carbon nanotubes were investigated by measuring their UV-Visible absorption spectra and photoluminescence spectra at an excitation wavelength of 375&#xa0;nm using Shimadzu RF- 1501 spectrofluorometer at room temperature. The MWCNTs were incorporated at varying concentrations (0.05, 0.06, 0.07, 0.08 wt%) to observe the doping effect on the optical properties of the LCs. The pure LC exhibited a strong absorption peak at 383&#xa0;nm, which reduced in intensity and shifted towards shorter wavelengths with increased CNTs concentration. The absorption coefficient and refractive index have been studied and they decreased with CNTs concentration increased. Photoluminescence measurements revealed two prominent emission peaks: one around 370&#xa0;nm corresponding to pure LC, and a broader peak between 450 and 500&#xa0;nm of LC doping CNTs. Moreover, a red shift in emission peak has been observed with higher CNT concentrations. This study could pave the way for several applications in optoelectronic devices, such as display technologies and photonic systems.</p>

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Optical Behavior Of A Liquid Crystal Doped With Carbon Nanotubes

  • 期刊论文

  • 发表日期：

    2025年3月13日

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  • Lamees A. Abdullah,
  • Hamsa N. Naser,
  • Alaa A. Rashad,
  • Nasreen R. Jber

摘要

In this work, the optical behavior of N-(4-Methoxybenzylidene)-4-butylaniline (MBBA) nematic liquid crystals doped with carbon nanotubes has been studied. The optical characteristics of pure LC and LC doping with carbon nanotubes were investigated by measuring their UV-Visible absorption spectra and photoluminescence spectra at an excitation wavelength of 375 nm using Shimadzu RF- 1501 spectrofluorometer at room temperature. The MWCNTs were incorporated at varying concentrations (0.05, 0.06, 0.07, 0.08 wt%) to observe the doping effect on the optical properties of the LCs. The pure LC exhibited a strong absorption peak at 383 nm, which reduced in intensity and shifted towards shorter wavelengths with increased CNTs concentration. The absorption coefficient and refractive index have been studied and they decreased with CNTs concentration increased. Photoluminescence measurements revealed two prominent emission peaks: one around 370 nm corresponding to pure LC, and a broader peak between 450 and 500 nm of LC doping CNTs. Moreover, a red shift in emission peak has been observed with higher CNT concentrations. This study could pave the way for several applications in optoelectronic devices, such as display technologies and photonic systems.