«The electric field around the cell pushes away electrons in graphene's electron cloud,» he said, which changes the vibration energy of the carbon atoms. (sciencedaily.com)
Although both samples were treated in the same way, they exhibited different nitrogen concentrations, but almost identical electronic doping: not all nitrogen atoms were integrated in the graphene lattice, nevertheless the number of electrons in the graphene rose as if this were the case. (sciencedaily.com)
José Sánchez - Dehesa and Daniel Torrent at the Polytechnic University of Valencia claim that the sound moves in the same way as electrons in graphene, with almost no losses (Physical Review Letters, DOI: 10.1103 / PhysRevLett.108.174301). (newscientist.com)