Field emission study of graphene nanowalls prepared by microwave-plasma method

The field emission properties of graphitic nanowalls prepared by a simple microwave-based method are presented. The effects of deposition method on the agglomeration and field emission properties of samples were also studied. Thermal treatment of these samples at 300 degrees C in air and at 1000 degrees C in argon further increased electron emission properties by improving the graphitic order of the samples and removal of impurities. (C) 2011 Elsevier Ltd. All rights reserved.