Hannover 2010 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 8: Poster I

A 8.32: Poster

Dienstag, 9. März 2010, 16:30–19:00, Lichthof

Fabrication and characterization of carbon nantubes structures on atom chipsvi — •Gabriela Visanescu, Peter Federsel, Michael Häffner, Philipp Schneeweiss, Michael Gierling, Dieter Kern, Andreas Günther, and Jozsef Fortágh — Center for Collective Quantum Phenomena and their Applications, Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen http://www.pit.physik.uni-tuebingen.de/fortagh/

Carbon nanotubes have been grown using plasma enhanced chemical vapour deposition (PECVD) on the surface of a silicon substrate. Free standing multiwall nanotubes, lines of nanotubes, carpets of nanotubes, and suspended beams of single wall nanotubes have been fabricated. We characterize the structure and mechanical properties of the nanotubes by means of scanning electron microscopy (SEM) and an atomic force microscopy (AFM). We observe that the mechanical resonance frequency of the fabricated nanotubes (4-20um length) is in the range between tens of MHz and a few hundred kHz. The chips with carbon nanotubes find application in cold atom experiments as potential generating elements and in atom detectors based on field ionization near nanotube tips and subsequent ion counting.