Light Modulation of Electronic Transitions in Semiconducting Single Wall Carbon Nanotubes
2004; American Chemical Society; Volume: 4; Issue: 8 Linguagem: Inglês
10.1021/nl049538j
ISSN1530-6992
AutoresRafail F. Khairutdinov, Mikhail E. Itkis, Robert C. Haddon,
Tópico(s)Photochromic and Fluorescence Chemistry
ResumoUV illumination of semiconducting single wall carbon nanotubes (SWNTs) results in a substantial increase of the intensity of the first interband transition (S11) followed by dark or IR light induced restoration of the initial intensity. The intensity of the S11 transition could also be modulated by light-induced reversible conversion of spiropyran molecules attached to SWNTs from the spiro conformation to its merocyanine form. Both surface-located monomeric and end-located aggregated merocyanines were found in UV illuminated spiropyran-SWNT supramolecular conjugates.
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