title: Controlled synthesis of 2-D and 3-D dendritic platinum nanostructures.
abstract: Seeding and autocatalytic reduction of platinum salts in aqueous surfactant solution using ascorbic acid as the reductant leads to remarkable dendritic metal nanostructures. In micellar surfactant solutions, spherical dendritic metal nanostructures are obtained, and the smallest of these nanodendrites resemble assemblies of joined nanoparticles and the nanodendrites are single crystals. With liposomes as the template, dendritic platinum sheets in the form of thin circular disks or solid foamlike nanomaterials can be made. Synthetic control over the morphology of these nanodendrites, nanosheets, and nanostructured foams is realized by using a tin-porphyrin photocatalyst to conveniently and effectively produce a large initial population of catalytic growth centers. The concentration of seed particles determines the ultimate average size and uniformity of these novel two- and three-dimensional platinum nanostructures.
authors.affiliation: Advanced Materials Laboratory, Sandia National Laboratories, and Department of Chemistry, University of New Mexico, Albuquerque, New Mexico, USA.
authors.forename: Yujiang
authors.initials: Y
authors.lastname: Song
authors.forename: Yi
authors.initials: Y
authors.lastname: Yang
authors.forename: Craig J
authors.initials: CJ
authors.lastname: Medforth
authors.forename: Eulalia
authors.initials: E
authors.lastname: Pereira
authors.forename: Anup K
authors.initials: AK
authors.lastname: Singh
authors.forename: Huifang
authors.initials: H
authors.lastname: Xu
authors.forename: Yingbing
authors.initials: Y
authors.lastname: Jiang
authors.forename: C Jeffrey
authors.initials: CJ
authors.lastname: Brinker
authors.forename: Frank
authors.initials: F
authors.lastname: van Swol
authors.forename: John A
authors.initials: JA
authors.lastname: Shelnutt