Regensburg 2013 – wissenschaftliches Programm

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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 36.56: 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 — ¹H1107 Heliosbau, Technische Universität Ilmenau, Prof. Schmidt Str. 26, 98693 Ilmenau, Germany — ²Institut für MaterialPhysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany

Abstract 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. This was followed by removing the PS spheres with toluene and consequently 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. With the use of the PS spheres, 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 10 nm) 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.