title: Long-range orientation and atomic attachment of nanocrystals in 2D honeycomb superlattices.
abstract: Oriented attachment of synthetic semiconductor nanocrystals is emerging as a route for obtaining new semiconductors that can have Dirac-type electronic bands such as graphene, but also strong spin-orbit coupling. The two-dimensional (2D) assembly geometry will require both atomic coherence and long-range periodicity of the superlattices. We show how the interfacial self-assembly and oriented attachment of nanocrystals results in 2D metal chalcogenide semiconductors with a honeycomb superlattice. We present an extensive atomic and nanoscale characterization of these systems using direct imaging and wave scattering methods. The honeycomb superlattices are atomically coherent and have an octahedral symmetry that is buckled; the nanocrystals occupy two parallel planes. Considerable necking and large-scale atomic motion occurred during the attachment process.
authors.affiliation: Debye Institute for Nanomaterials Science, University of Utrecht, Post Office Box 80.000, 3508 TA Utrecht, Netherlands.
authors.forename: M P
authors.initials: MP
authors.lastname: Boneschanscher
authors.affiliation: Opto-electronic Materials Section, Delft University of Technology, Julianalaan 136, 2628 BL Delft, Netherlands. Kavli Institute of Nanoscience, Delft University of Technology, Post Office Box 5046, 2600 GA Delft, Netherlands.
authors.forename: W H
authors.initials: WH
authors.lastname: Evers
authors.affiliation: Debye Institute for Nanomaterials Science, University of Utrecht, Post Office Box 80.000, 3508 TA Utrecht, Netherlands.
authors.forename: J J
authors.initials: JJ
authors.lastname: Geuchies
authors.affiliation: Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium.
authors.forename: T
authors.initials: T
authors.lastname: Altantzis
authors.affiliation: Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium.
authors.forename: B
authors.initials: B
authors.lastname: Goris
authors.affiliation: Debye Institute for Nanomaterials Science, University of Utrecht, Post Office Box 80.000, 3508 TA Utrecht, Netherlands.
authors.forename: F T
authors.initials: FT
authors.lastname: Rabouw
authors.affiliation: Debye Institute for Nanomaterials Science, University of Utrecht, Post Office Box 80.000, 3508 TA Utrecht, Netherlands.
authors.forename: S A P
authors.initials: SA
authors.lastname: van Rossum
authors.affiliation: Kavli Institute of Nanoscience, Delft University of Technology, Post Office Box 5046, 2600 GA Delft, Netherlands.
authors.forename: H S J
authors.initials: HS
authors.lastname: van der Zant
authors.affiliation: Opto-electronic Materials Section, Delft University of Technology, Julianalaan 136, 2628 BL Delft, Netherlands.
authors.forename: L D A
authors.initials: LD
authors.lastname: Siebbeles
authors.affiliation: Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium.
authors.forename: G
authors.initials: G
authors.lastname: Van Tendeloo
authors.affiliation: Debye Institute for Nanomaterials Science, University of Utrecht, Post Office Box 80.000, 3508 TA Utrecht, Netherlands.
authors.forename: I
authors.initials: I
authors.lastname: Swart
authors.affiliation: European Synchrotron Radiation Facility (ESRF), Grenoble, Beamline ID01, France.
authors.forename: J
authors.initials: J
authors.lastname: Hilhorst
authors.affiliation: Debye Institute for Nanomaterials Science, University of Utrecht, Post Office Box 80.000, 3508 TA Utrecht, Netherlands.
authors.forename: A V
authors.initials: AV
authors.lastname: Petukhov
authors.affiliation: Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium.
authors.forename: S
authors.initials: S
authors.lastname: Bals
authors.affiliation: Debye Institute for Nanomaterials Science, University of Utrecht, Post Office Box 80.000, 3508 TA Utrecht, Netherlands. d.vanmaekelbergh@uu.nl.
authors.forename: D
authors.initials: D
authors.lastname: Vanmaekelbergh