凯发

Graphene-based materials which were first created in 2004 are of great interest because of its excellent mechanical and electrical properties, opening up a new research area for materials science. However, a lack of an efficient approach to producing processable graphene sheets in large quantities has been a major obstacle to exploiting most proposed applications. Similar to carbon nanotubes, a key challenge in the synthesis and processing of bulk-quantity graphene sheets is aggregation. Its functionalization is quite necessary to achieve well dispersion, which is possible to incorporate them into a various composite material without any aggregation. Furthermore, such functionalization would also be helpful for the modification at electrode interfaces, which exhibits potential application in electrochemistry and electroanalytical chemistry due to its high electric conductivity and chemical stability, tunable modification, applicable template for nanocomposites (metallic nanoparticles and conjugated organic small molecules and polymers). In our group, graphene nanosheets have been functionalized successfully by various components, such as ionic liquids, biocompatible poly-L-lysine, dyes, conjugated/conducting polymers, metallic/semi-conductive nanoparticles, etc. And well dispersion in various media has been achieved, which exhibits potential application in fabrication of nanocomposite materials, and also in electrochemistry and electroanalytical chemistry.