title: Structure and flow of droplets on solid surfaces.
abstract: The structure and flow of droplets on solid surfaces is investigated with imaging and scattering techniques and compared to simulations. To access nanostructures at the liquid-solid interface advanced scattering techniques such as grazing incidence small-angle x-ray scattering (GISAXS) with micro- and nanometer-sized beams, GISAXS and in situ imaging ellipsometry and GISAXS tomography are used. Using gold nanoparticle suspensions, structures observed in the wetting area due to deposition are probed in situ during the drying of the droplets. After drying, nanostructures in the wetting area and inside the dried droplets are monitored. In addition to drying, a macroscopic movement of droplets is caused by body forces acting on an inclined substrate. The complexity of the solid surfaces is increased from simple silicon substrates to binary polymer brushes, which undergo a switching due to the liquid in the droplet. Nanostructures introduced in the polymer brush due to the movement of droplets are observed.
authors.affiliation: Physik-Department E13, Technische Universität München, Lehrstuhl für Funktionelle Materialien, Garching, Germany. muellerb@ph.tum.de
authors.forename: P
authors.initials: P
authors.lastname: Müller-Buschbaum
authors.forename: D
authors.initials: D
authors.lastname: Magerl
authors.forename: R
authors.initials: R
authors.lastname: Hengstler
authors.forename: J-F
authors.initials: JF
authors.lastname: Moulin
authors.forename: V
authors.initials: V
authors.lastname: Körstgens
authors.forename: A
authors.initials: A
authors.lastname: Diethert
authors.forename: J
authors.initials: J
authors.lastname: Perlich
authors.forename: S V
authors.initials: SV
authors.lastname: Roth
authors.forename: M
authors.initials: M
authors.lastname: Burghammer
authors.forename: C
authors.initials: C
authors.lastname: Riekel
authors.forename: M
authors.initials: M
authors.lastname: Gross
authors.forename: F
authors.initials: F
authors.lastname: Varnik
authors.forename: P
authors.initials: P
authors.lastname: Uhlmann
authors.forename: M
authors.initials: M
authors.lastname: Stamm
authors.forename: J M
authors.initials: JM
authors.lastname: Feldkamp
authors.forename: C G
authors.initials: CG
authors.lastname: Schroer
mesh_terms: D003198:Computer Simulation; D004581:Electronics; D006046:Gold / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods; D010316:Particle Size; D010825:Physics / Q000379:methods*; D011108:Polymers / Q000737:chemistry; D012542:Scattering, Radiation; D012825:Silicon; D013499:Surface Properties; D017155:Wettability; D014965:X-Rays
chemical_list: D011108:Polymers; D006046:Gold; D012825:Silicon