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Sa 19. 5. 2007, 9.20–9.40 A<br />

Kurzvortrag - Hauptthema 12<br />

Single particle SERS investigations of individual<br />

carbon nanotubes<br />

Alf Mews 1 , Matteo Scolari 1 , Nan Fu 1 , Anton<br />

Myalitsin 1 , Tilman Assmus 2 , and<br />

Marko Burghard 2<br />

(1) Department of Chemistry, University<br />

of Siegen, Siegen, 57068, Germany<br />

(2) MPI <strong>für</strong> Festkörperforschung, Stuttgart,<br />

70569, Germany<br />

Individual single wall carbon nanotubes (CNTs)<br />

were produced by chemical vapour deposition and<br />

subsequently electrochemically decorated with gold<br />

nanoparticles of variable density and sizes between<br />

30 to 150 nm. Confocal Raman- and Fluorescence<br />

spectroscopy revealed a localized increase of the CNT<br />

Raman-intensity at the position of the gold nanoparticles,<br />

which is attributed to a localized surface<br />

enhancement effect (SERS). In addition, a broad<br />

visible fluorescence of the gold particles is observed.<br />

We will present detailed correlations of the particle<br />

structure and their respective enhancement effects<br />

to get a deeper insight into the basic mechanisms<br />

that lead to the SERS-effect.

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