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Dielectric properties of nematic liquid crystal doped with Fe3O4 nanoparticles

Maleki, A ; Sharif University of Technology | 2017

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  1. Type of Document: Article
  2. DOI: 10.1080/01411594.2016.1201821
  3. Publisher: Taylor and Francis Ltd , 2017
  4. Abstract:
  5. The influence of Fe3O4 nanoparticles (NPs) on dielectric properties of planar and homeotropic oriented nematic liquid crystals (NLCs) were studied during the temperature interval of 298–322 °K. It was found that the dielectric permittivity was considerably increased by adding NPs mass percentages. The structural characterization of the synthesized NPs with the scale 14–18 nm has been analyzed by the X-ray diffraction and field-emission scanning electron microscopy results. The obtained dielectric anisotropy (Δε) and mean dielectric (Formula presented.) have shown an immense increment in the value of 1% and 10% wt. NPs doped NLCs, respectively. These results were assigned to the strong dipole–dipole interaction between the superparamagnetic particles and the surrounding liquid crystal molecules. © 2016 Informa UK Limited, trading as Taylor & Francis Group
  6. Keywords:
  7. Magnetic nanoparticles ; Nematic liquid crystals ; Dielectric properties ; Dielectric properties of liquids ; Field emission microscopes ; Liquid crystals ; Liquids ; Nanomagnetics ; Nanoparticles ; Permittivity ; Scanning electron microscopy ; X ray diffraction ; Dielectric anisotropies ; Dielectric permittivities ; Field emission scanning electron microscopy ; Liquid crystal molecules ; Magnetic nano-particles ; Structural characterization ; Superparamagnetic particles ; Temperature intervals
  8. Source: Phase Transitions ; Volume 90, Issue 4 , 2017 , Pages 371-379 ; 01411594 (ISSN)
  9. URL: https://www.tandfonline.com/doi/abs/10.1080/01411594.2016.1201821