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Microscopic model of the optical absorption of carbon nanotubes functionalized with molecular spiropyran photoswitches

  • The adsorption of molecules to the surface of carbon nanostructures opens a new field of hybrid systems with distinct and controllable properties. We present a microscopic study of the optical absorption in carbon nanotubes functionalized with molecular spiropyran photoswitches. The switching process induces a change in the dipole moment leading to a significant coupling to the charge carriers in the nanotube. As a result, the absorption spectra of functionalized tubes reveal a considerable redshift of transition energies depending on the switching state of the spiropyran molecule. Our results suggest that carbon nanotubes are excellent substrates for the optical readout of spiropyran-based molecular switches. The gained insights can be applied to other noncovalently functionalized one-dimensional nanostructures in an externally induced dipole field.

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Author:E. Malic, C. Weber, M. Richter, V. Atalla, Tillmann Klamroth, Peter SaalfrankORCiDGND, Sebastian ReichORCiD, A. Knorr
ISSN:0031-9007 (print)
Parent Title (English):Physical review letters
Publisher:American Physical Society
Place of publication:College Park
Document Type:Article
Year of first Publication:2011
Year of Completion:2011
Release Date:2017/03/26
Funder:Deutsche Forschungsgemeinschaft [SFB 658]; ERC [210642]
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Peer Review:Referiert