title: Programming Colloidal Crystal Habit with Anisotropic Nanoparticle Building Blocks and DNA Bonds.
abstract: Colloidal crystallization can be programmed using building blocks consisting of a nanoparticle core and DNA bonds to form materials with controlled crystal symmetry, lattice parameters, stoichiometry, and dimensionality. Despite this diversity of colloidal crystal structures, only spherical nanoparticles crystallized with BCC symmetry experimentally yield single crystals with well-defined crystal habits. Here, we use low-symmetry, anisotropic nanoparticles to overcome this limitation and to access single crystals with different equilibrium Wulff shapes: a cubic habit from cube-shaped nanoparticles, a rhombic dodecahedron habit from octahedron-shaped nanoparticles, and an octahedron habit from rhombic dodecahedron-shaped nanoparticles. The observation that one can control the microscopic shape of single crystals based upon control of particle building block and crystal symmetry has important fundamental and technological implications for this novel class of colloidal matter.
authors: Department of Chemistry, International Institute for Nanotechnology, Northwestern University , Evanston, Illinois 60208, United States.
authors: Matthew N
authors: MN
authors: O'Brien
authors: Department of Chemistry, International Institute for Nanotechnology, Northwestern University , Evanston, Illinois 60208, United States.
authors: Hai-Xin
authors: HX
authors: Lin
authors: Department of Materials Science and Engineering, Northwestern University , Evanston, Illinois 60208, United States.
authors: Martin
authors: M
authors: Girard
authors: Department of Chemistry, International Institute for Nanotechnology, Northwestern University , Evanston, Illinois 60208, United States.|Department of Materials Science and Engineering, Northwestern University , Evanston, Illinois 60208, United States.
authors: Monica
authors: M
authors: Olvera de la Cruz
authors: Department of Chemistry, International Institute for Nanotechnology, Northwestern University , Evanston, Illinois 60208, United States.|Department of Materials Science and Engineering, Northwestern University , Evanston, Illinois 60208, United States.
authors: Chad A
authors: CA
authors: Mirkin
mesh_terms: D003102:Colloids / Q000737:chemistry*; D003460:Crystallization; D004247:DNA / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*
chemical_list: D003102:Colloids; D004247:DNA