An epitaxial hexagonal tungsten bronze as precursor for WO_3 nanorods on mica

摘要

Tungsten oxide nanorods are grown at atmospheric pressure and low temperature (360 ℃), by sublimation of WO_3 and condensation on mica substrates. The nanorods are characterized by atomic force microscopy, high-resolution electron microscopy, energy-dispersive X-ray spectroscopy and high energy electron diffraction. The experimental results evidence the formation of a hexagonal tungsten bronze at the nanorod-substrate interface. The epitaxial relationships of the nanorods on mica are determined and the role of epitaxial orientation of the interfacial bronze in the nanorod growth and morphology are discussed