title: Fabrication of colloidal crystals with tubular-like packings.
abstract: Methods are reported for the fabrication of colloidal crystal wires with tubular packings. Both free and silica-encased wires have been prepared. Porous silicon membranes are infiltrated with silica spheres, treated with silane, and annealed. After removal of the silicon template, short annealing times were found to result in colloidal crystal wires with varied packing geometries, while repeated annealing cycles produced a thin translucent silica sheath around the wires. Packing in the wires varies with the channel diameter of the Si membrane. The channels used in this study typically produce colloidal crystal wires with six strands, though wires with four to seven strands have been observed. Both chiral and achiral packings are also possible.
authors.affiliation: Department of Chemistry and the Advanced Materials Research Institute, University of New Orleans, New Orleans, Louisiana 70148-2820, USA.
authors.forename: Feng
authors.initials: F
authors.lastname: Li
authors.forename: Xavier
authors.initials: X
authors.lastname: Badel
authors.forename: Jan
authors.initials: J
authors.lastname: Linnros
authors.forename: John B
authors.initials: JB
authors.lastname: Wiley
mesh_terms: D001672:Biocompatible Materials / Q000138:chemical synthesis / Q000737:chemistry; D003102:Colloids / Q000138:chemical synthesis* / Q000737:chemistry; D003460:Crystallization; D008855:Microscopy, Electron, Scanning; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D001672:Biocompatible Materials; D003102:Colloids; D012822:Silicon Dioxide