Rapid growth of vertically aligned tungsten oxide nanostructures by flame vapor deposition process

•Flame vapor deposition system embedded with a wire feeder was developed firstly.•The wire feed rate was found to determine the morphology of nanostructures.•Various tungsten oxide nanostructures vertically grown on substrate were obtained.•The feasible growth mechanisms of all nanostructures were proposed in this work.•This work offers a method for rapid growth of nanostructured metal oxide thin films.

Flame vapor deposition system embedded with a wire feeder was developed for the first time to guarantee the precise control of wire feed rate. Vertically aligned nanowire, nanotube, multi-tube and bush-like tungsten oxide nanostructures were successfully obtained in this system. The feasible growth mechanisms of these nanostructures were proposed. This research offers a robust and fast approach to prepare nanostructured metal oxide thin films with controlled morphologies.

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