Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 35: Poster Session II (Polymeric biomolecular films; Nanostructures; Electronic structure; Spin-orbit interaction; Phase transitions; Surface chemical reactions; Heterogeneous catalysis; Particles and clusters; Surface magnetism; Electron and spin dynamics; Surface dynamics; Methods; Electronic structure theory; Functional molecules)
O 35.14: Poster
Dienstag, 27. März 2012, 18:15–21:45, Poster B
Manipulating and contacting single InAs Nanowires at GaAs edges — •Kilian Flöhr1, Yusuf Günel2, Kamil Sladek2, Robert Frielinghaus2, Hilde Hardtdegen2, Carola Meyer2, Marcus Liebmann1, Thomas Schäpers1,2, and Markus Morgenstern1 — 1II. Physikalisches Institut, RWTH Aachen and JARA Jülich Aachen Research Alliance, 52074 Aachen, Germany — 2Peter Grünberg Institut, Forschungszentrum Jülich and JARA Jülich Aachen Research Alliance, 52425 Jülich, Germany
We investigated methods to spatially control InAs nanowires on a substrate using micromanipulators attached to an optical microscope with the goal of producing InAs tips for scanning tunneling microscopy. The wires, which were grown by metalorganic vapor phase epitaxy (MOVPE) on a GaAs wafer without catalysts, could be picked up individually using a sharp indium tip exploiting adhesion forces. Later, the wires were placed with submicrometer precision onto the desired position somewhere at the edge of a cleaved GaAs wafer or on other substrates, e.g. a perforated Si3N4 membrane [1]. We established a new method to realize ohmic contacts for partly suspended nanowires at the wafer edge with standard electron beam lithography.
[1] K. Flöhr, M. Liebmann, K. Sladek, H.Y. Günel, R. Frielinghaus, F. Haas, C. Meyer, H. Hardtdegen, Th. Schäpers, D. Grützmacher, M. Morgenstern, Rev. Sci. Instrum. 82, 113705 (2011)