Reduced Graphene Oxide Based Silver Sulfide Hybrid Films Formed at A Liquid/Liquid Interface

摘要

Free-standing, ultra-thin films of silver sulfide and reduced graphene oxide (RGO) based silver sulfide hybrids are prepared at a liquid/liquid interface employing in situ chemical reaction strategy. Ag_2S and RGO-Ag_2S hybrid films are characterized by various techniques such as UV-visible and photo luminescence spectroscopy, X-ray diffraction and scanning electron microscopy. The morphology of hybrid films consists of Ag_2S nanocrystals on RGO surface while Ag_2S films contains branched network of dendritic structures. RGO-Ag_2S exhibit interesting optical and electrical properties. The hybrid films absorb in the region 500-650 nm and show emission in the red region. A higher conductance is observed for the hybrid films arising from the RGO component. This simple low cost method can be extended to prepare other RGO based metal sulfides.