title: Low packing density self-assembled superstructure of octahedral Pt3Ni nanocrystals.
abstract: We present a structural study of Pt(3)Ni nanoctahedron superlattice, prepared through both drop-casting and controlled solvent evaporation approaches. In this superlattice system containing ∼10.6 nm side-length Pt(3)Ni nanoctahedra, we observed a body-centered cubic (bcc) packing structure in both local superlattices and statistically averaged superlattice ensembles using transmission electron microscopic tomography and grazing-incidence small-angle X-ray scattering techniques, respectively. Within the superstructure, it was directly observed that nanoctahedra are orientated along the superstructure axes through sharing their vertices. We found that this arrangement of a bcc superstructure with nanoctahedra connecting through their vertices is dependent on neither the processing pathway nor the substrate under our experimental conditions. With such a very low packing density and ultrahigh surface area, this type of self-organized superstructure possesses unique features for future applications.
authors.affiliation: Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Zhiping
authors.initials: Z
authors.lastname: Luo
authors.forename: Zewei
authors.initials: Z
authors.lastname: Quan
authors.forename: Yuxuan
authors.initials: Y
authors.lastname: Wang
authors.forename: Amar
authors.initials: A
authors.lastname: Kumbhar
authors.forename: Detlef-M
authors.initials: DM
authors.lastname: Smilgies
authors.forename: Jiye
authors.initials: J
authors.lastname: Fang
mesh_terms: D046911:Macromolecular Substances / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology; D009532:Nickel / Q000737:chemistry*; D010316:Particle Size; D010984:Platinum / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; D010984:Platinum; D009532:Nickel