Nano-Space Online

Graphite is an allotropic modification of carbon with sp2-hybridized atoms of carbon in the points of the hexagonal lattice that forms monoatomic layers. One such layer is a single graphene sheet. Graphite particles consist of arrays of graphene sheets arranged in parallel, forming graphite’s layered structure. Synthetic graphite powder consists of microparticles sized from 10 to 140 um, with low content of impurities (< 10-5 %). Surface layers of graphite particles form folds and single flakes. Lateral surfaces have a stepped structure formed by the edges of graphene sheets. Basal layers seem to be relatively smooth; however, they usually have a number of defects, as well as a domain structure. Point defects and grain boundaries cannot be directly observed by SEM, but they can be visualized with the help of metal nanoparticles as markers. More detail...