title: Ordered mesoporous materials from metal nanoparticle-block copolymer self-assembly.
abstract: The synthesis of ordered mesoporous metal composites and ordered mesoporous metals is a challenge because metals have high surface energies that favor low surface areas. We present results from the self-assembly of block copolymers with ligand-stabilized platinum nanoparticles, leading to lamellar CCM-Pt-4 and inverse hexagonal (CCM-Pt-6) hybrid mesostructures with high nanoparticle loadings. Pyrolysis of the CCM-Pt-6 hybrid produces an ordered mesoporous platinum-carbon nanocomposite with open and large pores (>/=10 nanometers). Removal of the carbon leads to ordered porous platinum mesostructures. The platinum-carbon nanocomposite has very high electrical conductivity (400 siemens per centimeter) for an ordered mesoporous material fabricated from block copolymer self-assembly.
authors.affiliation: Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA.
authors.forename: Scott C
authors.initials: SC
authors.lastname: Warren
authors.forename: Lauren C
authors.initials: LC
authors.lastname: Messina
authors.forename: Liane S
authors.initials: LS
authors.lastname: Slaughter
authors.forename: Marleen
authors.initials: M
authors.lastname: Kamperman
authors.forename: Qin
authors.initials: Q
authors.lastname: Zhou
authors.forename: Sol M
authors.initials: SM
authors.lastname: Gruner
authors.forename: Francis J
authors.initials: FJ
authors.lastname: DiSalvo
authors.forename: Ulrich
authors.initials: U
authors.lastname: Wiesner