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Träfflista för sökning "WFRF:(Palmqvist Anders 1966) ;pers:(Andersson Martin 1974)"

Sökning: WFRF:(Palmqvist Anders 1966) > Andersson Martin 1974

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  • Andersson, Martin, 1974, et al. (författare)
  • Use of Self-Assembled Surfactants for Nanomaterials Synthesis
  • 2009
  • Ingår i: Particulate Systems in Nano- and Biotechnologies. ; , s. 27-51
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
    • Synthesis of inorganic materials with nanosized dimensions can take advantage of the ability of surfactants to self-assemble into well-defined structures. These structures are used as a kind of template for the synthesis. This approach of nanomaterials preparation has triggered substantial interest both in the surface chemistry and the materials chemistry community. The accuracy and reproducibility of the self-assembly process has been seen as means of achieving control of materials architecture on the nanometer scale. This is a biomimetic approach; a wide variety of biological structural materials are made by a templating process with the use of surface active compounds—primarily surface active polymers but also low molecular weight polar lipids. The number of papers dealing with surfactant-templated synthesis of inorganic materials has increased dramatically in recent years and several review papers deal with various aspects of the technique (1-12). Existing and potential applications for the synthesized materials range from biomaterials (e.g., artificial bone), to technical products such as catalysts, magnetic particles, and pigments.
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  • Saramat, Ali, 1977, et al. (författare)
  • Differences in catalytic properties between mesoporous and nanoparticulate platinum
  • 2007
  • Ingår i: European Physical Journal D. - : Springer Science and Business Media LLC. - 1434-6079 .- 1434-6060. ; 43:1-3, s. 209-211
  • Tidskriftsartikel (refereegranskat)abstract
    • Conventional Pt/Al2O3 catalysts prepared by wet-impregnation are composed of Pt nanoparticles exposing convex and facetted surfaces deposited on high-surface area gamma-Al2O3 supports. A hexagonal phase mesoporous Pt material (denoted H-1-Pt) prepared by chemical reduction in the aqueous domains of a lyotropic liquid crystalline template exposes however mainly a concave surface with expected different catalytic properties. A series of Pt/Al2O3 catalysts were prepared using H-1-Pt, Pt-black or wet-impregnated Pt, and the samples were characterized by SEM-EDX and TEM, and finally evaluated for CO oxidation. The H-1-Pt/Al2O3 catalyst showed an ignition profile for CO oxidation at lower temperatures and thus appeared less sensitive to CO poisoning than the two other types of samples. This difference may be related to the differences in surface curvature.
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