Growth of Epitaxial Tungsten Nanorods

TL;DR

This paper reports a simple vapor deposition method for growing epitaxial tungsten oxide nanorods, revealing their growth mechanism and structural properties at relatively low temperatures.

Contribution

It introduces a novel vapor deposition technique for epitaxial tungsten nanorods and proposes a growth mechanism involving a tetragonal tungsten bronze precursor.

Findings

Epitaxial tungsten nanorods grown on mica at 500°C

Growth axis along [0 1 0] directions

Proposed formation of tetragonal tungsten bronze precursor

Abstract

A simple vapour deposition technique was used to prepare WO3 one-dimensional nanostructures.WO3 is sublimated at a relatively low temperature (550 1C) in air at atmospheric pressure.The sublimated species are condensed on mica substrate at 500 1C.Single crystalline nanorods are grown in epitaxy on the mica surface with a growth axis along [0 1 0] directions and (0 0 1) plane parallel to the substrate.A growth process is proposed in which the formation of a onedimensional tetragonal tungsten bronze as precursor is the determining factor.