Preparation And Infrared Analysis Of Graphene-Polystyrene Sphere Composite

Since 2004 when British scientists A. Geim and K. Novoselov discovered graphene, it has made a lot of progress about this new material. The electrical and mechanical properties of graphene are fantastic. The composites made with graphene can realize some useful functions which cannot or hard to realize by normal composites. In the early days of it, the only way to get graphene is to spare it by the method of mechanical exfoliation directly from graphite. It is only after the method of Chemical Vapor Deposition has been invented that it becomes possible for people to synthesize graphene with a large scale, leading to a rapid development of graphene processing and graphene composites. Nowadays,combining graphene with other materials into a new composite is just flourishing.While most researchers are focus on the electrical property of graphene, it makes people frown at treating with its high transmittance. This is often taken as a drawback of graphene, and in order to increase the photoelectric conversion effect of graphene,researchers often add something into the composite system. These additions like electrodes refine the applying of graphene. In this work, the author take the infrared absorption of polymers adhered into the surface of graphene as a method of micro-scale material detection, according to the coupling effect between the charge carriers on the graphene surface and adhered molecules under illumination. This work can be seen as a supplement to the main trend method.The material combined with graphene in most of present research is based on metals,whose absorption frequencies are outside of infrared spectrum. In this work, a polymer(polystyrene sphere), whose absorption frequencies are mostly in the mid-infrared spectrum,is taken as the detect objection. This can be treated as another supplement of present studies.