Analysing the photoluminescence intensities of single-walled carbon nanotubes
| Autor: | Sebastian Heeg, Michael S. Strano, Stephanie Reich, Joel T. Abrahamson |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Materials science
Photoluminescence Condensed Matter::Other 02 engineering and technology Carbon nanotube Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 3. Good health Electronic Optical and Magnetic Materials law.invention Optical properties of carbon nanotubes Condensed Matter::Materials Science law Excited state 0103 physical sciences Photoluminescence excitation Atomic physics 010306 general physics 0210 nano-technology Chirality (chemistry) Absorption (electromagnetic radiation) Luminescence |
| Zdroj: | physica status solidi (b). 249:2473-2478 |
| ISSN: | 0370-1972 |
| Popis: | We study the photoluminescence and photoluminescence excitation intensities of single-walled carbon nanotubes. To derive the chirality fractions of semiconducting tubes from these optical methods requires a thorough analysis of the experimental parameters and the lifetimes of the excitonic states. We obtain the intensity distribution from the product of the widths of the first and second excitonic transition and the intensity of the absorption of the second excited state. Compared with previous analysis protocols our intensity distribution points towards a chirality abundance which is (i) narrower in diameter, (ii) centred at smaller diameters and (iii) more strongly dominated by armchair-like tubes. We present a recipe for the fit of luminescence data. |
| Databáze: | OpenAIRE |
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