title: Graphene unit cell imaging by holographic coherent diffraction.
abstract: We have imaged a freestanding graphene sheet of 210 nm in diameter with 2 Å resolution by combining coherent diffraction and holography with low-energy electrons. The entire sheet is reconstructed from a single diffraction pattern displaying the arrangement of 660.000 individual graphene unit cells at once. Given the fact that electrons with kinetic energies of the order of 100 eV do not damage biological molecules, it will now be a matter of developing methods for depositing individual proteins onto such graphene sheets.
authors.affiliation: Physik Institut der Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland.
authors.forename: Jean-Nicolas
authors.initials: JN
authors.lastname: Longchamp
authors.forename: Tatiana
authors.initials: T
authors.lastname: Latychevskaia
authors.forename: Conrad
authors.initials: C
authors.lastname: Escher
authors.forename: Hans-Werner
authors.initials: HW
authors.lastname: Fink