Low contact resistivity and strain in suspended multilayer graphene

摘要

Method to prepare suspended multilayer graphene (MLG) flakes and to form highly conductive (contact resistivity of ～0.1 kΩ μm~2) and tight mechanical connection between MLG and metal electrodes is described. MLG flakes prepared from natural graphite were precisely deposited over tungsten electrodes using dielectrophoresis, followed by high-temperature thermal annealing in high-vacuum. Considerable strain induced in the suspended part of flakes was revealed by Raman imaging.