12. Conclusions and Further Outlook

As it has been shown above, a grand variety of carbon allotropes and forms is currently known. They can be very common (graphite, coal) or rare (nanobuds, nanoplates, or nanocups) and can be well-developed industrially (carbon black) or intensively studied on nano-level (carbon nanotubes or graphene), doped with metals and functionalized with organic and organometallic moieties. The hexagonal network of nanotube cylinders, graphene sheets, or fullerene molecules consisting of hexagons and pentagons of carbon atoms are highly aesthetically pleasing, providing inspiration both to artists and scientists [1]. The shape of carbon nanotubes also influences their outstanding physical properties, such as electrical and heat conductance, which are already exceeding many traditional materials, as well as mechanical strength. Fully carbon electronic devices are now a main dream and great expectative of modern technologies, where a lot of researchers are working.