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A: Fachverband Atomphysik
A 23: Poster II
A 23.43: Poster
Donnerstag, 11. März 2010, 16:30–19:00, Lichthof
Measurements of the topography of Carbon Nanotube structures and cold atom-nanotube interactions — •Michael Gierling1, Philipp Schneeweiss1, Gabriela Visanescu1, Johannes Märkle1, Thomas Judd1, Michael Häffner1, Dieter Kern1, Carsten Weiss2, Reinhold Walser3, Andreas Günther1, and and József Fortágh1 — 1Center for Collective Quantum Phenomena and their Applications, Universität Tübingen, Auf der Morgenstelle 14, D- 72076 Tübingen — 2Institut für Quantenphysik, Universität Ulm, D-89069 Ulm — 3Institut für Angewandte Physik, TU Darmstadt, Hochschulstraße 4a, D-64289 Darmstadt
We have developed an ultracold atom experiment for studying the interaction between 87Rb atoms and carbon nanotubes (CNTs). We present the setup and the technique that is used for measuring the topography of CNT structures on a chip surface. For the measurements, ultracold atom clouds are used as a scanning surface probe. For the three-dimensional nano-positioning of the atom cloud we use a magnetic conveyor belt. The method allows the resolution of nanotube arrays, nanotube lines, and individual free standing nanotubes. We also present the measurement of loss and heating rates of atom clouds spatially overlapping with a single, free standing CNT. We discuss the acquired data and the possibility to quantitatively describe the interaction between atoms and nanotubes.