Method for Preparing Oriented Tungstic Trioxide Nano-film

The invention relates to a method for preparing an orientated tungsten oxide nano film.

The method takes an ethanol suspension of monocrystal tungsten trioxide (WO3) nano-plates as a precursor, and utilizes the habit that the nano-plate with high diameter-thickness ratio tends to be parallel to a substrate and the principle that solvent volatilization causes the oriented self-assembly of the nano-plate to prepare the tungsten oxide (WO3) nano film which is formed by overlapping the tungsten trioxide (WO3) nano-plates and oriented along the [002] crystallographic direction. The method is completed at a room temperature, and does not require subsequent heating treatment; and the tungsten trioxide (WO3) nano film prepared is strongly oriented along the [002] crystallographic direction, namely the WO3 nano film is spread along an ab plane and a c- shaft is the film thickness direction.

The method has the characteristics of simple technological process, convenient operation, low requirements on equipment conditions and strong adaptability; and WO3 nano film materials have the characteristics of high crystallinity and good orientation.


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