title: Dendron-Mediated Engineering of Interparticle Separation and Self-Assembly in Dendronized Gold Nanoparticles Superlattices.
abstract: Self-assembly of nanoparticles into designed structures with controlled interparticle separations is of crucial importance for the engineering of new materials with tunable functions and for the subsequent bottom-up fabrication of functional devices. In this study, a series of lipophilic, highly flexible, disulfide dendritic wedges (generations 0-4), based on 2,2-bis(hydroxymethyl)propionic acid, was designed to bind Au nanoparticles with a thiolate bond. By controlling the solvent evaporation rate, the corresponding dendron-capped Au hybrids were found to self-organize into hexagonal close-packed (hcp) superlattices. The interparticular spacing was progressively varied from 2.2 to 6.3 nm with increasing dendritic generation, covering a range that is intermediate between commercial ligands and DNA-based ligand shells. Dual mixtures made from some of these dendronized hybrids (i.e., same inner core size but different dendritic covering) yielded binary superlattice structures of unprecedented single inorganic components, which are isostructural with NaZn13 and CaCu5 crystals.
authors.affiliation: Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.|Complex Assemblies of Soft Matter Laboratory (COMPASS), UMI 3254, CNRS-Solvay-University of Pennsylvania, CRTB , 350 George Patterson Boulevard, Bristol, Pennsylvania 19007, United States.
authors.forename: Davit
authors.initials: D
authors.lastname: Jishkariani
authors.affiliation: Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
authors.forename: Benjamin T
authors.initials: BT
authors.lastname: Diroll
authors.affiliation: Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
authors.forename: Matteo
authors.initials: M
authors.lastname: Cargnello
authors.affiliation: Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
authors.forename: Dahlia R
authors.initials: DR
authors.lastname: Klein
authors.affiliation: Complex Assemblies of Soft Matter Laboratory (COMPASS), UMI 3254, CNRS-Solvay-University of Pennsylvania, CRTB , 350 George Patterson Boulevard, Bristol, Pennsylvania 19007, United States.
authors.forename: Lawrence A
authors.initials: LA
authors.lastname: Hough
authors.affiliation: Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.|Department of Materials Science and Engineering, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
authors.forename: Christopher B
authors.initials: CB
authors.lastname: Murray
authors.affiliation: Complex Assemblies of Soft Matter Laboratory (COMPASS), UMI 3254, CNRS-Solvay-University of Pennsylvania, CRTB , 350 George Patterson Boulevard, Bristol, Pennsylvania 19007, United States.|Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504, CNRS-Université de Strasbourg , 23 rue du Loess, BP43, Strasbourg 67034 Cedex 2, France.
authors.forename: Bertrand
authors.initials: B
authors.lastname: Donnio