Regensburg 2010 – scientific programme

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O: Fachverband Oberflächenphysik

O 59: Poster Session II (Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: arrays; Nanostructures at surfaces: Wires, tubes; Nanostructures at surfaces: Other; Plasmonics and nanooptics; Metal substrates: Epitaxy and growth; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsoprtion of organic / bio molecules; Metal substrates: Adsoprtion of inorganic molecules; Metal substrates: Adsoprtion of O and/or H; Metal substrates: Clean surfaces; Density functional theory and beyond for real materials)

O 59.12: Poster

Wednesday, March 24, 2010, 17:45–20:30, Poster B1

Electrodeposition of free-standing regular arrays of metallic nanowires using template synthesizing technique — •Nina Winkler, Yong Lei, and Gerhard Wilde — Institut für Materialphysik, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str. 10, 48149 Münster

The fabrication of free-standing metallic nanowires with a template synthesizing method is investigated.

Magnetic nanowires may serve as high density perpendicular recording hard disks to avoid the superparamagnetic limit of nanometer-sized metallic structures.

Due to the high pore regularity of porous anodic alumina membranes, they serve as templates for the electrochemical growth of metallic nanowires. The alumina membranes were fabricated by a two-step anodization process of aluminum foils in oxalic and sulfuric acids. The insulating alumina barrier layer should be removed for electrodeposition of metallic nanowires. A method for perforating this barrier layer is presented in this work. A voltage pulse profile is applied for the electrodeposition processes with a potentiostat to achieve regular nanowires. The total time for the deposition is depending on the desired length of the nanowires.

After the deposition of the metals, the alumina membranes are removed by acidic etching to realize free-standing metallic nanowires. Their magnetic properties are investigated.