title: Vertical arrays of anisotropic particles by gravity-driven self-assembly.
abstract: Anisotropic particles assemble to spontaneously form columnar arrays. Hybrid nanotube/nanowire particles (silica nanotubes partially filled with metallic cores) deposit with their denser metallic ends towards the surface, orienting them vertically. Up to 84% are observed to be standing over a 0.64 cm(2) area within 15 min. Standing percentage is found to be dependent on particle surface concentration.
authors.affiliation: 104 Chemistry Building, University Park, PA, 16802, USA.
authors.forename: Benjamin D
authors.initials: BD
authors.lastname: Smith
authors.forename: David J
authors.initials: DJ
authors.lastname: Kirby
authors.forename: Christine D
authors.initials: CD
authors.lastname: Keating
mesh_terms: D016880:Anisotropy; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry*; D053770:Nanowires / Q000737:chemistry*