title: Directed liquid phase assembly of highly ordered metallic nanoparticle arrays.
abstract: Directed assembly of nanomaterials is a promising route for the synthesis of nanoscale materials. In this paper, we demonstrate the directed-assembly of highly ordered two-dimensional arrays of hierarchical nanostructures with tunable size, spacing and composition. The directed assembly is achieved on lithographically patterned metal films that are subsequently pulse-laser melted; during the brief liquid lifetime, the pattened nanostructures assemble into highly ordered primary and secondary nanoparticles, with sizes below that which was originally patterned. Complementary fluid-dynamics simulations emulate the resultant patterns and show how the competition of capillary forces and liquid metal-solid substrate interaction potential drives the directed assembly. As an example of the enhanced functionality, a full-wave electromagnetic analysis has been performed to identify the nature of the supported plasmonic resonances.
authors.affiliation: Department of Materials Science and Engineering, The University of Tennessee , Knoxville, Tennessee 37996, United States.
authors.forename: Yueying
authors.initials: Y
authors.lastname: Wu
authors.forename: Nanyi
authors.initials: N
authors.lastname: Dong
authors.forename: Shaofang
authors.initials: S
authors.lastname: Fu
authors.forename: Jason D
authors.initials: JD
authors.lastname: Fowlkes
authors.forename: Lou
authors.initials: L
authors.lastname: Kondic
authors.forename: Maria A
authors.initials: MA
authors.lastname: Vincenti
authors.forename: Domenico
authors.initials: D
authors.lastname: de Ceglia
authors.forename: Philip D
authors.initials: PD
authors.lastname: Rack