Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 79: Experimental methods
O 79.2: Vortrag
Donnerstag, 29. März 2012, 16:15–16:30, A 060
Quantitative investigation and optimization of porous anodic alumina for surface nanostructuring beyond existing limitations — •Stefan Ostendorp1, Jörn Leuthold1, Yong Lei1,2, and Gerhard Wilde1 — 1Institut für Materialphysik, WWU Münster — 2Institut für Physik & IMN (ZIK) MacroNano, TU Ilmenau
Porous anodic alumina (PAA) is a versatile and cost-efficient template material for various applications in surface nano-structuring. As porous anodic alumina membranes (PAAMs), it can be used for arrays of 1-dimensional nano-structures. Arrays of nano particles can be fabricated by ultra-thin alumina membranes (UTAMs). Thereby this PAA based nano-structuring techniques allow to modify structural parameters of fabricated nano-structures such as size, shape and spacing of nano-particles as well as diameter and length of wires or tubes. The outstanding ability of creating large scale arrays of hexagonally arranged nano-structures makes this technique interesting for different fields from fundamental physical studies to applications in optics or electronics. But actually the range of fabrication conditions resulting in regular PAA was rather limited so far. Here we present our recent progress extending these limitations. By detailed studies of the formed porous structures and by applying a newly developed method for quantifying their regularity we were able to tune the fabrication conditions and realize regular PAA with structural parameters beyond the known limitations. Furthermore, we present a novel fabrication technique to realize regular UTAMs for nano-structuring purposes within the newly extended range of accessible structural parameters.