Mulu, Fikre2018-06-252023-11-092018-06-252023-11-092013-03http://10.90.10.223:4000/handle/123456789/3102Graphene is a new two-dimensional material prepared succesfully in experiments several years ago. It is a single layer of carbon atoms arranged in a hexagonal (honeycomb) lattice. The two-dimensional nature of graphene leads to many intersting electronic, thermal, optical trans- parency, and high mobility properties. One particularly interesting property of graphene is that it exhibits the quantum Hall e ect at room temperature. In addition graphene is substantially stronger than steel, and it is very stretchableenGraphene is a New Two -Dimensional MaterialThesis