Inspired by the nano- and microscale structure of biological surfaces, a kind of nanopapilla particle possessing both nano- and microscale structure has been prepared via a hydrothermal method. The nanopapilla particles have been analyzed using transmission electron microscopy (TEM), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) methods, energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD), etc. The results show that TiO2 nanopapillae are radially distributed on the surface of thin-flake kaolinite. The BET surface area and the wettability of the nanopapilla particles show a marked improvement can be attributed to the enhanced dielectric properties of the nanopapilla-particle electrorheological fluid.