Dresden 2011 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 36: Poster Session II (Metals; Nanostructures at surfaces; Surface or interface magnetism; Spin-Orbit Interaction at Surfaces; Electron and spin dynamics; Surface dynamics; Methods; Theory and computation of electronic structure)
O 36.72: Poster
Dienstag, 15. März 2011, 18:30–22:00, P4
A combination of pulsed laser interference and block copolymer micelle lithography — •Fabian Enderle1, Alfred Plettl1, Paul Ziemann1, Stephen Riedel2, Johannes Boneberg2, Paul Leiderer2, and Elke Scheer2 — 1Institut für Festkörperphysik, Universität Ulm, D-89069 Ulm — 2Fachbereich Physik, Universität Konstanz, D-78457 Konstanz
A basic goal of surface nanopatterning is to provide possibilities to "write" lateral patterns decorated with e.g. metallic nanoparticles (NPs) as opposed to homogeneously decorated surfaces. The latter type of NP coating can be accomplished by exploiting the self-organization of precursor loaded diblock-copolymers forming reverse spherical micelles in apolar solvents. After optimized dip-coating a surface and removing the polymer matrix by oxygen/hydrogen plasma treatments, one finally obtains homogeneous hexagonally ordered arrays of metallic NPs. To add lateral patterning, one may try to influence the wetting behavior of the micelle containing solution. For this end, first an OTS-SAM (octadecyltrichlorosilane) is prepared on the surface and exposed to a nanosecond pulsed laser interference pattern. Above a certain energy density of the laser, the related temperature pattern will remove SAM molecules in the high temperature regions by thermal desorption. It will be demonstrated that upon dip-coating the micellar solution on top of such a laser pre-patterned surface a corresponding deposition contrast of metal NPs can be achieved.