Abstract
In this study, vanadium pentoxide (V2O5) nanoparticles were synthesized by hydrothermal method. The structural and morphological properties of obtained nanoparticles were examined using X-ray diffractometer, scanning electron microscopy and transmission electron microscopy. The optical properties of produced nanoparticles have been investigated by fluorescence spectrometer. The produced V2O5 nanoparticles showed an emission peak at 378 nm when excited at 314 nm. The characterized V2O5 nanoparticles dispersed to nematic liquid crystals mixture E7. Threshold voltage, dielectric anisotropy values of pristine E7 and V2O5 nanoparticles dispersed samples have been investigated using impedance analyzer. The phase transitions and microstructural properties of the prepared nanoparticle dispersed liquid crystalline complexes were investigated by differential scanning calorimeter and polarized optical microscopy. Moreover, splay elastic constant and order parameter of the samples were calculated. The synthesized V2O5 nanoparticles were aggregated for 0.5% V2O5 dispersed samples after 30 days were found. Dielectric measurements revealed that the dielectric anisotropy slightly decreased with the dispersion of V2O5 nanoparticles.
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