Structure And Properties Study Of Organic-inorganic Hybrid FC/ZnO Materials Prepared By RF Magnetron Sputtering

The study on the hybrid materials is the crossing of multi-subjects,which is also the forefront and hotspot studied all over the world.The hybrid materials are synthesizing advantages of organic and inorganic materials.It has the multi-function effect and it has become the fourth generation materials following the single component materials, composite materials and grads materials.The first prepared method of the hybrid materials was sol-gel method.The new methods have appeared continuously in the decades,which are mainly 6 kinds at present,including sol-gel process,blending,intercalation,self-assemble,electrolysis polymerization and in-situ polymerization method and so on.The method of RF magnetron sputtering has never been noticed.The advantages of RF sputtering process are simplicity,time saving, environment friendly and high purity of the hybrid materials.The sputtering process can be proceeding with production and separation of particles at the same time,so,avoid nanometer particles congregated together.The prepared fluorocarbon films were yellowish, indicating that there are large numbers of C=C conjugate double bonds on the surface.The transition-absorption of electron produced certain absorption property on UV-visible light, and,it is well-known that ZnO is a wide band gap semiconductor,which has been exhibited the excellent absorption property on UV-visible light,so,co-deposition of mixed FC/ZnO maybe show more intensive UV absorption properties.Fluorocarbon films exhibited the good hydrophobicity,while,after becoming hybrid materials with ZnO,is it changed or not? These studies can provide us a new method to prepare new-style mluti-function materials.In this paper,hybrid fluorocarbon/ZnO materials were prepared by RF magnetron sputtering.At first,the polytetrafluoroethylene(PTFE) is used as the targets.Argon was used as working gas.Fluorocarbon macromolecular organic films were deposited onto polyethylene terephalate(PET) substrates.And then,the Zinc is used as targets,argon and oxygen were used as the working and reacting gas respectively,with oxygen:argon volume ratio 3:1.Zinc reacted to oxygen and the inorganic micro molecular films of zinc oxide got through reaction were deposited on the fluorocarbon films.The fluorocarbon/ZnO hybrid materials were obtained.The obtained films were characterized by means of SEM,AFM,XPS,FT-IR,UV-visible spectrophotometer and static contact angle apparatus,so as to find the regular that morphology,structure and properties vary as the sputtering conditions.The surface morphology and growth mode of fluorocarbon films and fluorocarbon/ZnO were observed by SEM and AFM.The growing mechanism of FC/ZnO,the relationship of surface morphology and sputtering conditions were discussed.It was found that the fluorocarbon films prepared by double macromolecular system(target-substrate) were the deposited ones with double nano-structure of nano-particles and nano-holes.Fluorocarbon grains deposited on the PET substrates tended to be finer,more uniformly dispersed,more globular and more densely with increasing the power and pressure.After the hybrid materials formed,the surface morphology changed a little:at early stage(within 2 minutes), surface morphology of the composite films kept primary regular structure of fluorocarbon films because the deposited ZnO particles were very few.Diameter of ZnO particles was bigger than that of fluorocarbon particles'.So the lines of weave-like network structure were thicker but can be about one hundred nanometer.With the deposited time of ZnO increased,5 minutes later,primary surface morphology of fluorocarbon films were covered with ZnO particles completely.The growth mode of hybrid films is especial,which is a mode of deposited-expansion adhering to organic core.That is,when the composite films formed,ZnO particles deposited on fluorocarbon films had the feature of selectivity:first deposited on the top,then expanded all around and grew on the nucleus of the fluorocarbon macromolecular.AFM shows that the surface of the films is undulate.Particles grow vertically to the film surface,and then form a taper-like structure.They are complicated islands-like structure.Each island is composed of many nanometer particles.The height of islands increased gradually with the deposited time of ZnO increased.At first the top of the islands is smooth and then become cuspidal,at last become flatter.The deposit speed of...