Ultrafast Energy Transfer from Fluorene Polymers to Single-Walled Carbon Nanotubes in Wrapped Carbon Nanotube Bundles
| Autor: | Yasumitsu Miyata, Takeshi Koyama, Arao Nakamura, Hisanori Shinohara |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Photoluminescence Materials science Nanotechnology 02 engineering and technology Carbon nanotube Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention General Energy chemistry law Excited state Photoluminescence excitation Physical and Theoretical Chemistry 0210 nano-technology Luminescence Hybrid material Spectroscopy |
| Zdroj: | The Journal of Physical Chemistry C. 120:4647-4652 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.5b12191 |
| Popis: | Conjugated polymers can selectively wrap around single-walled carbon nanotubes (SWNTs) with specific chiral angles and diameters. Such a hybrid material containing both SWNTs and polymers is attractive for applications such as organic photovoltaic devices and photosensors. In this study, we investigate excitation energy transfer (EET) in a paper form of semiconducting SWNTs wrapped by poly(9,9-dioctylfluorenyl-2,7-diyl) (PFO) by means of photoluminescence (PL) excitation spectroscopy and time-resolved luminescence spectroscopy. Photoluminescence excitation maps and spectra show PL peaks when the 0–0 singlet transition of PFO is excited at 2.88 eV, as well as peaks corresponding to EET between semiconducting SWNTs wrapped by PFO. The PL decay time measured for a drop-cast PFO film is 82 ps, whereas the decay time due to PFO in the PFO-wrapped SWNT sample is as short as 0.38 ps. From these results, the EET rate between PFO and SWNTs is estimated to be 2.6 × 1012 s–1. Comparison of the highest occupied molec... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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