Binding Graphene Sheets Together Using Silicon: Graphene/Silicon Superlattice
Department of Electrical and Computer Engineering and Center for Optoelectronics, University of North Carolina at Charlotte, Charlotte, NC, 28223, USA
Nanoscale Research Letters 2010, 5:805-808 doi:10.1007/s11671-010-9561-xPublished: 13 February 2010
We propose a superlattice consisting of graphene and monolayer thick Si sheets and investigate it using a first-principles density functional theory. The Si layer is found to not only strengthen the interlayer binding between the graphene sheets compared to that in graphite, but also inject electrons into graphene, yet without altering the most unique property of graphene: the Dirac fermion-like electronic structure. The superlattice approach represents a new direction for exploring basic science and applications of graphene-based materials.