title: Colloidal silver nanoparticle gradient layer prepared by drying between two walls of different wettability.
abstract: A one-dimensional silver (Ag) nanoparticle gradient layer is prepared from an aqueous colloidal solution upon a polystyrene (PS) coated silicon (Si) substrate. For preparation two walls of different wettability are used. The 40 nm PS-layer exhibits a locally constant film thickness due to the strong roughness correlation with the underlying Si-substrate and is less wettable as compared to the glass plate placed above. The Ag nanoparticles have a triangular prism-like shape. The structural characterization of the obtained complex gradient formed by drying is performed with microbeam grazing incidence small-angle x-ray scattering based on compound refractive lenses. Due to the adsorption from aqueous solution in the selective geometry a double gradient type structure defined by two areas with characteristic lateral lengths and a cross-over regime between both is observed.
authors.affiliation: HASYLAB at DESY, Notkestraße 85, D-22607 Hamburg, Germany.
authors.forename: S V
authors.initials: SV
authors.lastname: Roth
authors.forename: M
authors.initials: M
authors.lastname: Kuhlmann
authors.forename: H
authors.initials: H
authors.lastname: Walter
authors.forename: A
authors.initials: A
authors.lastname: Snigirev
authors.forename: I
authors.initials: I
authors.lastname: Snigireva
authors.forename: B
authors.initials: B
authors.lastname: Lengeler
authors.forename: C G
authors.initials: CG
authors.lastname: Schroer
authors.forename: M
authors.initials: M
authors.lastname: Burghammer
authors.forename: C
authors.initials: C
authors.lastname: Riekel
authors.forename: P
authors.initials: P
authors.lastname: Müller-Buschbaum