title: Orientationally Ordered Silicon Nanocrystal Cuboctahedra in Superlattices.
abstract: Uniform silicon nanocrystals were synthesized with cuboctahedral shape and passivated with 1-dodecene capping ligands. Transmission electron microscopy, electron diffraction, and grazing incidence wide-angle and small-angle X-ray scattering show that these soft cuboctahedra assemble into face-centered cubic superlattices with orientational order. The preferred nanocrystal orientation was found to depend on the orientation of the superlattices on the substrate, indicating that the interactions with the substrate and assembly kinetics can influence the orientation of faceted nanocrystals in superlattices.
authors.affiliation: McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712-1062, United States.
authors.forename: Yixuan
authors.initials: Y
authors.lastname: Yu
authors.affiliation: McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712-1062, United States.
authors.forename: Xiaotang
authors.initials: X
authors.lastname: Lu
authors.affiliation: McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712-1062, United States.
authors.forename: Adrien
authors.initials: A
authors.lastname: Guillaussier
authors.affiliation: McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712-1062, United States.
authors.forename: Vikas Reddy
authors.initials: VR
authors.lastname: Voggu
authors.affiliation: McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712-1062, United States.
authors.forename: William
authors.initials: W
authors.lastname: Pineros
authors.affiliation: Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology (BIST) , Campus UAB, Bellaterra, 08193 Barcelona, Catalonia, Spain.
authors.forename: Maria
authors.initials: M
authors.lastname: de la Mata
authors.affiliation: Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology (BIST) , Campus UAB, Bellaterra, 08193 Barcelona, Catalonia, Spain.|ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Catalonia, Spain.
authors.forename: Jordi
authors.initials: J
authors.lastname: Arbiol
authors.affiliation: Cornell High Energy Synchrotron Source (CHESS), Cornell University , Ithaca, New York 14853, United States.
authors.forename: Detlef-M
authors.initials: DM
authors.lastname: Smilgies
authors.affiliation: McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712-1062, United States.
authors.forename: Thomas M
authors.initials: TM
authors.lastname: Truskett
authors.affiliation: McKetta Department of Chemical Engineering and Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712-1062, United States.
authors.forename: Brian A
authors.initials: BA
authors.lastname: Korgel
keywords: Orientational order; silicon nanocrystals; superlattices; transformation matrix