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New Insigths on Photo-Active Molecules Within Host Carbon Nanotubes

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Photo-active molecules are confined into single-wall carbon nanotubes to create 1D hybrid systems with new and original opto-electronic properties. This work deals with the encapsulation of quaterthiophene derivative and phthalocyanine molecules. They display strong optical absorption in the visible range, respectively around 400 and 670 nm. Encapsulation efficiency is investigated through Transmission Electron Microscopy. The physical interactions are mainly investigated by optical spectroscopies. The Raman spectra of the oligothiophene hybrid systems exhibit a striking dependence with the excitation energy which is correlated to the optical absorption energy of the photo-active molecule. Close to the molecule resonance, the results suggest a significant photo-induced charge transfer between the photo-active molecules and the nanotubes. In addition, the resonance window of the confined molecules depends on the nanotube diameter. The Raman spectra of the phthalocyanine based systems depend on the optical resonance conditions of the encapsulated molecules and on the structural properties of the hybrid system.
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Keywords: CARBON NANOTUBES; CHROMOPHORES; CONFINEMENT; ENCAPSULATION; OLIGOTHIOPHENE; PHTHALOCYANINE; RAMAN

Document Type: Review Article

Publication date: January 1, 2013

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  • Journal of Nanoelectronics and Optoelectronics (JNO) is an international and cross-disciplinary peer reviewed journal to consolidate emerging experimental and theoretical research activities in the areas of nanoscale electronic and optoelectronic materials and devices into a single and unique reference source. JNO aims to facilitate the dissemination of interdisciplinary research results in the inter-related and converging fields of nanoelectronics and optoelectronics.
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