Synthesis, characterization of V2O5 nanoparticle and dispersion of them into nematic liquid crystal

In this study, vanadium pentoxide (V 2 O 5 ) 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 V 2 O 5 nanoparticles showed an emission peak at 378 nm when excited at 314 nm. The characterized V 2 O 5 nanoparticles dispersed to nematic liquid crystals mixture E7. Threshold voltage, dielectric anisotropy values of pristine E7 and V 2 O 5 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 V 2 O 5 nanoparticles were aggregated for 0.5% V 2 O 5 dispersed samples after 30 days were found. Dielectric measurements revealed that the dielectric anisotropy slightly decreased with the dispersion of V 2 O 5 nanoparticles.