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O: Fachverband Oberflächenphysik
O 36: Poster Session II (Organic films and electronics, photoorganics; Nanostructures; Plasmonics and nanooptics, Surface chemical reactions and heterogeneous catalysis, Surface dynamics )
O 36.57: Poster
Dienstag, 12. März 2013, 18:15–21:45, Poster B2
Polystyrene spheres assisted anodization method for the preparation of size-controlled pore diameter and separation in the AAO template — •Yaoguo Fang1, Kin Mun Wong1, Liaoyong Wen1, Yan Mi1, Gerhard Wilde2, and Yong Lei1 — 1Fachgebiet 3D-Nanostrukturierung, Institut für Physik & IMN MacroNano (ZIK), Institute for Physics and IMN MacroNano (ZIK),Technische Universität Ilmenau, Prof. Schmidt Str. 26, 98693 Ilmenau, Germany — 2Institut für MaterialPhysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
We propose a method where the size of the pores in the anodic aluminum oxide (AAO) template can be precisely controlled with the use of the regular arrays of polystyrene (PS) spheres as a mask. A monolayer of PS spheres was first prepared on the bare aluminum foil and the silica sol was introduced into the spaces between the PS spheres. After removing the PS spheres, highly ordered arrays of micro-bowl structures are fabricated on the Al foil. With the use of the PS spheres, the center of the bowl structures on the Al surface are not covered by the silica gel due to contact between the bottom of the PS sphere and the Al surface during the silica sol infiltration. Therefore most of the Al surface will be covered by the silica sol and the pores can only be formed at the center of highly ordered arrays of micro-bowl structures by the normal two-step anodization procedure. Importantly, with the use of the smaller PS spheres, smaller pore diameters(less than 10nm)in the AAO template can be obtained. In addition, the separation between the pores can be adjusted with the different sizes of the PS spheres.