title: Ultrathin gold nanoframes through surfactant-free templating of faceted pentagonal silver nanoparticles.
abstract: Ultrathin gold nanoframes (up to 1.6 nm) were prepared via templating upon well-defined faceted silver morphologies. Starting with silver decahedra, small quantities of gold (1-10 mol% relative to the amount of silver) were selectively deposited on the nanoparticle edges under optimized reducing conditions. Silver dissolution in hydrogen peroxide yielded well-defined gold frames that retained their structural integrity in the ultrathin nanowire regime below 2 nm. The frame formation protocol was also successfully applied to other silver nanoparticle shapes featuring pentagonal twinning and (111) facets (e.g., pentagonal faceted rods and icosahedra). The demonstrated approach can be applied in the controlled preparation of ultrathin metal nanowires complementary to lithography and in the production of ultrafine noble-metal nanostructures for catalytic applications.
authors.affiliation: Chemistry Department, Wilfrid Laurier University, 75 University Avenue West, Waterloo, Ontario, Canada N2L 3C5.
authors.forename: Matthew
authors.initials: M
authors.lastname: McEachran
authors.forename: Dilyn
authors.initials: D
authors.lastname: Keogh
authors.forename: Brendan
authors.initials: B
authors.lastname: Pietrobon
authors.forename: Nicole
authors.initials: N
authors.lastname: Cathcart
authors.forename: Ilya
authors.initials: I
authors.lastname: Gourevich
authors.forename: Neil
authors.initials: N
authors.lastname: Coombs
authors.forename: Vladimir
authors.initials: V
authors.lastname: Kitaev
mesh_terms: D001205:Ascorbic Acid / Q000737:chemistry; D006046:Gold / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D053770:Nanowires / Q000737:chemistry; D012834:Silver / Q000737:chemistry; D013501:Surface-Active Agents
chemical_list: D013501:Surface-Active Agents; D012834:Silver; D006046:Gold; D001205:Ascorbic Acid