Dresden 2011 – scientific programme
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O: Fachverband Oberflächenphysik
O 36: Poster Session II (Metals; Nanostructures at surfaces; Surface or interface magnetism; Spin-Orbit Interaction at Surfaces; Electron and spin dynamics; Surface dynamics; Methods; Theory and computation of electronic structure)
O 36.63: Poster
Tuesday, March 15, 2011, 18:30–22:00, P4
Contacting of individual InAs nanowires without photoresist — •Kilian Flöhr1,3, Marcus Liebmann1,3, Kamil Sladek2,3, Hilde Hardtdegen2,3, Thomas Schäpers2,3, Detlev Grützmacher2,3 und Markus Morgenstern1,3 — 1II. Institute of Physics, RWTH-Aachen University, 52074 Aachen — 2Institut für Bio- und Nanosysteme (IBN-1), Forschungszentrum Jülich, 52425 Jülich — 3Jülich Aachen Research Alliance (JARA)
We investigated methods to spacially 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 onto a desired position somewhere on or at the edge of a double cleaved wafer. Contacting the wires was accomplished using indium microsoldering [1] or electron beam induced deposition [2], since standard lithographic methods are not possible close to the wafer edge due to non-uniform photoresist thickness. Several variations of contacting the wires and optimizing the InAs/metal interface were tested and ohmic contacts could be realized.
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