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Photoluminescence microscopy of carbon nanotubes grown by chemical vapor deposition: Influence of external dielectric screening on optical transition energies

Kiowski, Oliver; Lebedkin, Sergei; Hennrich, Frank; Malik, Sharali; Rösner, Harald; Arnold, Katharina; Sürgers, Christoph; Kappes, Manfred M.

Photoluminescence (PL) laser microscopy was applied to determine optical transition energies E-11 and E-22 of individual semiconducting single-walled carbon nanotubes (SWNTs) suspended on top of carbon nanotube "forests," grown by chemical vapor deposition (CVD) on silicon substrates. A uniform increase of E-11 and E-22 energies by 40-55 and 24-48 meV, respectively, was found for 19 different (n,m) nanotube species suspended in air or a vacuum-relative to SWNTs in a reference water-surfactant dispersion. CVD-grown SWNTs embedded in paraffin oil and 1-methylnaphthalene show nearly the same PL peak positions as SWNTs in aqueous dispersion, indicating similar dielectric screening of excitons in SWNTs in these media.

DOI: 10.1103/PhysRevB.75.075421
Zitationen: 51
Zitationen: 47
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2007
Sprache Englisch
Identifikator ISSN: 1098-0121
KITopen-ID: 1000050513
HGF-Programm 43.02.02 (POF I, LK 01) Molekulare Bausteine
Erschienen in Physical Review B - Condensed Matter and Materials Physics
Verlag American Physical Society (APS)
Band 75
Heft 7
Seiten 075421/1-7
Externe Relationen Supplement
Nachgewiesen in Dimensions
Web of Science
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