Method for fabricating a film

A method for fabricating a film comprising at least one polymer layer formed of polyazulene, or of a copolymer, wherein one of the monomers is azulene, or of any combination thereof, wherein the film is situated on at least one surface of a substrate, wherein the method comprises the steps of:

• a) forming an oxidant layer on a deposition surface by applying a solution comprising an oxidant on the deposition surface;
• b) forming a polymer layer formed of polyazulene, or of a copolymer, wherein one of the monomers is azulene, or of any combination thereof, by exposing the deposition surface to at least azulene monomer vapour at a polymerization temperature of 20-95° C. under atmospheric pressure,
• wherein step a) precedes step b), wherein, during step b), the temperature of the deposition surface differs from the polymerization temperature by 5-30° C., and wherein, during step b), the temperature of the deposition surface is 25-75° C.