Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 61: Nanostructures at Surfaces III
O 61.4: Vortrag
Mittwoch, 2. April 2014, 16:45–17:00, WIL B321
Utilizing Dog-Boning to fabricate High-Aspect-Ratio Nanofences — •Vera Hoffmann1, Gunther Scheunert2, René Kullock3, and Lukas M. Eng1 — 1Institut für Angewandte Photophysik, Technische Universität Dresden, 01062 Dresden, Germany — 2Centre for Nanostructured Media, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, United Kingdom — 3Department of Experimental Physics 5, University of Würzburg, 97074 Würzburg, Germany
By combining electroplating, as the first thin-film technique ever in use [1], and anodized aluminum oxide (AAO), to create nanoscale templates, one can fabricate macroscopically large areas of uniform nanorod arrays [2]. In order to better exploit these arrays for sophisticated applications, e.g. catalysis or dielectric-index sensing, an additional structuring would be desirable. Previous approaches with additional top layers on the AAO prior to electroplating or the subsequent removal of nanorods with laser ablation led to fringed rims and thus limit the applicability of the resulting structures.
Here, we present a new way of structuring by utilitizing the dog-boning effect of electroplating and structured ground electrodes to deliberately fabricate nanofences -- lines of free-standing high-aspect ratio nanorods [3]. We will show and explain the mechanisms behind this fabrication as well as outline future applications.
[1] L. B. Hunt, Gold Bulletin, 6, 16 (1973). [2] R. Atkinson et al. Phys. Rev. B 73, 2354021 (2006). [3] G. Scheunert, V. Hoffmann et al. J. El. Chem. Soc., 161 D26-D30 (2014), DOI:10.1149/2.024401jes