Preparation And Properties Of Organic-inorganic Photosensitive Hybrid Films Doped With Azobenzene

In recent years,polymers containing azobenzene molecules have attracted considerable attention because of their broad application prospects in photonics.Organic-inorganic hybrid materials are new materials made by combining organic and inorganic materials at the nanometer level.The new hybrid materials have a series of unique physical and chemical properties and are widely used in the fields of optics and electromagnetics.Multifunctional Ti O₂/ormosils hybrid films doped with azobenzene and photoactive groups was prepared by low temperature sol-gel technology and spin coating method.and the prepared hybrid film have potential applications in photonics and nanoimprinting.Based on the photoisomerization characteristics of azobenzene molecules,the effects of temperature,titanium content,and azobenzene effect on photo-responsive properties of the hybrid films were studied.The results show that the hybrid films with a temperature of 50,a content of 0.2 mol titanium,and doped with 3wt.%azobenzene have good photo-responsive properties.The optical switching performance of the hybrid films have also been studied.Films with a temperature of 200°C,a titanium content of 0.2 mol,and doped with 3wt.%azobenzene have great optical switching performance.The characteristics of the optical waveguide including the thickness,refractive index,transmission mode,and transmission loss of the hybrid films were studied by prism coupling technology.The research results show that the optical transmission loss of the prepared composite film is about 0.2d B/cm,which is small enough to meet the requirements of optical waveguide components.The surface morphology and structural characteristics of the hybrid films were characterized by AFM,FTIR,TGA,and XPS.AFM analysis shows that when the temperature is lower than 200°C,a dense and smooth hybrid film can be obtained.TGA results show that the thermal stability of the hybrid gel is better than 150°C.FTIR and TGA were used to analyze the structural characteristics and chemical composition of the hybrid films.A polystyrene?PS?template and a photoresist template were used as master molds,and a microlens array structure was successfully embossed in the photosensitive composite film by using UV nano soft embossing technology to verify the photosensitivity of the hybrid films.