Diamond and graphite, the two well-known allotropes of carbon, were familiar from the ancient times. Fullerenes, the third form of carbon, were discovered in 1985 and carbon nanotubes in 1991. Thus three dimensional (3D) (diamond and graphite), 1D (nanotubes) and 0D (fullerenes) allotropes were known. Since the breakthrough in 2004 that two dimensional allotropes of carbon, graphene has been reported. It can be used in molecular electronics applications, such as field-effect transistors, research into this novel material has exploded. Graphene, a single sheet of graphite, consists of a hexagonal array of sp2-hybridised carbon atoms. The material has excellent electrical properties, is cheap to make and requires no helicity control, giving it a definitive advantage over other carbon-based materials such as nanotubes. In addition, the electronic properties of graphene sheets can be influenced by introducing atomic defects, using programmed self-assembly, and by changing the charge carrier concentration in bilayer graphene. Unfortunately though, the conductivity as of yet cannot be switched off, which impedes its incorporation into switchable systems. Recently, the poor material properties of the graphene were improved considerably by dispersing the single carbon sheets inside a polymer matrix, providing a path to a broad class of conductive composite graphene-based materials. The construction of small graphene sheets by chemical synthesis has recently been reported by Müllen. This bottom-up chemical synthesis of such large, unsaturated polycyclic aromatic hydrocarbon surfaces, however, has proven very laborious and time consuming, requiring a huge synthetic effort. Therefore, the aim of this proposal is the construction and physical characterisation of a novel class of materials which closely resemble graphene, by facile chemical synthesis, which can be synthetically tailored and post-processed to tune the material properties: clickgraphene.