Dresden 2009 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 27: Poster Session I (Methods: Scanning probe techniques; Methods: Atomic and electronic structure; Methods: Molecular simulations and statistical mechanics; Oxides and Insulators: Clean surfaces; Oxides and Insulators: Adsorption; Oxides and Insulators: Epitaxy and growth; Semiconductor substrates: Clean surfaces; Semiconductor substrates: Epitaxy and growth; Semiconductor substrates: Adsorption; Nano- optics of metallic and semiconducting nanostructures; Electronic structure; Methods: Electronic structure theory; Methods: other (experimental); Methods: other (theory); Solutions on surfaces; Epitaxial Graphene; Surface oder interface magnetism; Phase transitions; Time-resolved spectroscopies)
O 27.75: Poster
Dienstag, 24. März 2009, 18:30–21:00, P2
Tip-Enhanced Optical Microscopy of Single-Walled Carbon Nanotubes — •Carsten Georgi1, Miriam Böhmler1, Huihong Qian1, Lukas Novotny2, and Achim Hartschuh1 — 1Department Chemie und Biochemie & CeNS, Ludwig-Maximilians-Universität München, Germany — 2The Institute of Optics, University of Rochester, New York 14627, USA
Optical Microscopy with nanoscale spatial resolution is an essential technique for the characterization and investigation of individual nanoobjects. We use the field enhancement in the proximity of a laser-illuminated sharp metal tip to locally probe the optical response of single-walled carbon nanotubes. In particular we image their Raman scattering and photoluminescence properties with a spatial resolution of down to 10nm [1]. We can thereby directly observe the interaction of excitons with localized defects and the local environment of the nanotube, namely DNA-wrapping [2]. Inter-nanotube energy transfer was studied for different pairs of semiconducting nanotubes forming bundles and crossings, related to electromagnetic near-field coupling [3]. We also report on our recent experimental results on electrically contacted nanotubes and the photoluminescence of nanotubes on metal surfaces.
[1] A. Hartschuh, Angew. Chem. Int. Ed. 47, 8178 (2008)
[2] H. Qian et al., Nano Lett. 8, 2706 (2008)
[3] H. Qian et al., Nano Lett. 8, 1363 (2008)