Graphene boasts a truly magnificent and unique feature: its speed electrical conductivity is comparable to the speed of light. The electrical conductivity of the materials is provided by the mobility of electrons in atoms. For example, in metals a certain amount of electrons is located in a so-called zone of conductivity, which allows them to move freely between the atoms. Semiconductors in their turn have a so-called band gap, through which the electrons need to jump over so the material becomes electrically conducting. To achieve this, more energy, such as heat, is used.
So, although grapheme it is not a metal, it features no no gap, so that the electrons are free to move, which poses a serious problem: a graphene transistor can not be turned off completely, which means that the device containing such a transistor, will keep on permanently consuming electricity. However, there is an upside to this. Due to the fact that the mass of the electron graphene hardly affects the electric fields of other charged particles, it is capable of moving at a fantastic speed. So fast that its speed can only be described by Einstein’s theory of relativity, and the grapheme himself can be compared with particles accelerator. Such a mind-boggling speed of movement of electrons allows them reacting sensitively to high frequency electromagnetic fields, which in this case means that a graphene transistor is switched on and off very quickly.