Dielectric studies in gold nanoparticles doped ferroelectric liquid crystals

Citrate buffer stabilized gold nano particles (GNPs) were doped into a ferroelectric liquid crystal (FLC). Dielectric relaxation spectroscopy was carried out in the range 20Hz-10MHz. The behavior of permittivity was analyzed as a function of frequency and temperature. It was observed that adding a small amount of GNPs, the permittivity changes significantly by almost three times as compared to the pure FLC. Goldstone mode of relaxation was observed both in pristine and GNPs doped FLC. The relaxation frequency of this mode shifted to 80Hz and in case of pristine FLC, the frequency was observed to be 250Hz.