title: Shape control from thermodynamic growth conditions: the case of hcp ruthenium hourglass nanocrystals.
abstract: Recent successes in forming different shaped face centered cubic (fcc) metal nanostructures has enabled a greater understanding of nanocrystal growth mechanisms. Here we extend this understanding to the synthesis of hexagonally close packed (hcp) metal nanostructures, to form uniquely faceted ruthenium nanocrystals with a well-defined hourglass shape. The hourglass nanocrystals are formed in a three-step thermodynamic growth process with dodecylamine as the organic stabilizer. The hourglass nanocrystals are then shown to readily self-assemble to form a new type of nanocrystal superlattice.
authors.affiliation: School of Chemical and Physical Sciences and The MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, Wellington 6012, New Zealand.
authors.forename: John
authors.initials: J
authors.lastname: Watt
authors.forename: Chenlong
authors.initials: C
authors.lastname: Yu
authors.forename: Shery L Y
authors.initials: SL
authors.lastname: Chang
authors.forename: Soshan
authors.initials: S
authors.lastname: Cheong
authors.forename: Richard D
authors.initials: RD
authors.lastname: Tilley