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Single‐Walled Carbon Nanotube–CdS Nanocomposites as Light‐Harvesting Assemblies: Photoinduced Charge‐Transfer Interactions
Author(s) -
Robel I.,
Bunker B. A.,
Kamat P. V.
Publication year - 2005
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200500418
Subject(s) - photocurrent , nanocomposite , materials science , carbon nanotube , composite number , excitation , nanoparticle , excited state , charge (physics) , electron transfer , visible spectrum , photoinduced electron transfer , nanotechnology , optoelectronics , photochemistry , composite material , atomic physics , chemistry , physics , quantum mechanics , engineering , electrical engineering
Deposition of CdS nanoparticles on SWCNTs produces a photoactive composite that undergoes charge transfer interactions following excitation with visible light (see Figure). The transient bleaching recovery in approximately 200 ps confirms quick deactivation of excited CdS on the SWCNT surface. Visible excitation of the CdS–SWCNT film produces a photocurrent and thus provides evidence for the electron‐transfer pathway in the composite.