Dresden 2014 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 20: Nanostructures at Surfaces II

O 20.3: Vortrag

Montag, 31. März 2014, 16:30–16:45, WIL B321

Fabrication of nanoscaled Fe deposits by focused electron beam processes as catalyst for C-nanostructures growth — •Esther Carrasco, Fan Tu, Martin Drost, Florian Vollnhals, Hans-Peter Steinrück, and Hubertus Marbach — Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander Universität Erlangen-Nürnberg, Egerlandstr. 3, D-91058, Erlangen, Germany

The fabrication of clean iron nanostructures under UHV conditions is feasible via the technique of electron beam induced deposition (EBID) [1]. Fe is also successfully employed as a catalyst for the growth of carbon nanotubes (CNTs) by chemical vapor deposition (CVD) [2]. Control of the structure and location of individual CNTs with lithographic precision over large substrates is desired for their applications in electronic devices. By using EBID, we are able to design an arbitrary distribution of metal nanostructures, which can be used as a template for the fabrication of secondary C-nanostructures by CVD. The objective is twofold: i) a controlled fabrication of novel carbon nanostructures via catalytic growth from the structured EBID deposits. ii) the fabrication of single wall carbon nanotubes (SWCNTs) with specific characteristics from localized iron dots with diameters below 8 nm. Latest results will be presented and discussed. This work was supported by the DFG via grant MA 4246/1-2, MA 4246/2-1, Funcos FOR 1878 and the Cluster of Excellence Engineering of Advanced Materials of the FAU Erlangen-Nürnberg.

[1] T. Lukasczyk et al., Small 4 (2008) 841

[2] C. Mattevi et al., J Phys. Chem. C 112 (2008) 12207