  Despite many studies on how geometry can be used to control the electronic
properties of graphene, certain limitations to fabrication of designed graphene
nanostructures exist. Here, we demonstrate controlled topographical replication
of graphene by artificial deoxyribonucleic acid (DNA) nanostructures. Owing to
the high degree of geometrical freedom of DNA nanostructures, we controlled the
nanoscale topography of graphene. The topography of graphene replicated from
DNA nanostructures showed enhanced thermal stability and revealed an
interesting negative temperature coefficient of sheet resistivity when
underlying DNA nanostructures were denatured at high temperatures.
