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Exciton Dynamics and Biexciton Formation in Single-Walled Carbon Nanotubes Studied with Femtosecond Transient Absorption Spectroscopy
| Content Provider | Semantic Scholar |
|---|---|
| Author | Styers-Barnett, David J. Ellison, Stephen P. Mehl, Brian P. Westlake, Brittany C. House, Ralph Lee Park, Cheol Wise, Kristopher E. Papanikolas, John M. |
| Copyright Year | 2008 |
| Abstract | We used femtosecond transient absorption (TA) spectroscopy to examine the excited state dynamics of single-walled carbon nanotube (SWNT) bundles embedded in polymer matrices. The SWNTs were excited by a femtosecond pump pulse centered at either 1800, 900, or 550 nm and probed using a white-light continuum extending from 400 to 750 nm. We observed a structured TA spectrum consisting of a series of narrow induced transmission (IT) and induced absorption (IA) bands. The TA spectrum, which is independent of excitation wavelength, appeared on a time scale shorter than our instrument response (200 fs) and persisted for up to 100 ps. TA spectra obtained at a series of pump−probe delay times provided a window through which to monitor the exciton dynamics. We observed three distinct spectral signatures in the time-dependent data: (1) the decay of a broad photobleach, (2) the biphasic decay of narrow IT and IA features, and (3) a dynamical spectral shift of IA bands. These processes were attributed to plasmon rela... |
| Starting Page | 4507 |
| Ending Page | 4516 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.1021/jp7099256 |
| Alternate Webpage(s) | http://www.bimat.org/assets/pdf/nia_08_112styers-barnett.pdf |
| Alternate Webpage(s) | https://doi.org/10.1021/jp7099256 |
| Volume Number | 112 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
