Preparation of optical active single-handed helical barium titanate nanotubes and characterization of dielectric properties

Optical active single-handed helical barium titanate nanotubes constructed by nanoparticles with a partially crystalline structure are prepared with the impregnation of Ba(OH)2 into single-handed helical titania nanotubes. Both the dielectric constant and tanδ decrease with increasing the frequency. At 10 and 100 Hz, one dielectric constant peak at 9.6 °C and one tanδ peak at 5.0 °C are observed at −120 °C to 180 °C.