  We report on suspended single-layer graphene deposition by a
transfer-printing approach based on polydimethylsiloxane stamps. The transfer
printing method allows the exfoliation of graphite flakes from a bulk graphite
sample and their residue-free deposition on a silicon dioxide substrate. This
deposition system creates a blistered graphene surface due to strain induced by
the transfer process itself. Single-layer-graphene deposition and its
"blistering" on the substrate are demonstrated by a combination of Raman
spectroscopy, scanning electron microscopy and atomic-force microscopy
measurements. Finally, we demonstrate that blister-like suspended graphene are
self-supporting single-layer structures and can be flattened by employing a
spatially-resolved direct-lithography technique based on electron-beam induced
etching.
