Transient Absorption Kinetics Associated with Higher Exciton States in Semiconducting Single-Walled Carbon Nanotubes: Relaxation of Excitons and Phonons

2013 ◽  
Vol 117 (39) ◽  
pp. 20289-20299 ◽  
Author(s):  
Takeshi Koyama ◽  
Shohei Yoshimitsu ◽  
Yasumitsu Miyata ◽  
Hisanori Shinohara ◽  
Hideo Kishida ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Transient Absorption ◽  
Single Walled Carbon Nanotubes ◽  
Absorption Kinetics ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

scholarly journals Many-particle excitations in non-covalently doped single-walled carbon nanotubes

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Timofei V. Eremin ◽  
Petr A. Obraztsov ◽  
Vladimir A. Velikanov ◽  
Tatiana V. Shubina ◽  
Elena D. Obraztsova
Keyword(s):  
Carbon Nanotubes ◽  
Transient Absorption ◽  
Energy State ◽  
Energy Levels ◽  
Optical Excitation ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
New Energy ◽  
Walled Carbon Nanotubes ◽  
Kinetics Of

Abstract Doping of single-walled carbon nanotubes leads to the formation of new energy levels which are able to participate in optical processes. Here, we investigate (6,5)-single walled carbon nanotubes doped in a solution of hydrochloric acid using optical absorption, photoluminescence, and pump-probe transient absorption techniques. We find that, beyond a certain level of doping, the optical spectra of such nanotubes exhibit the spectral features related to two doping-induced levels, which we assign to a localized exciton $$X$$ X and a trion T, appearing in addition to an ordinary exciton $${E}_{1}$$ E 1 . We evaluate the formation and relaxation kinetics of respective states and demonstrate that the kinetics difference between E1 and X energy levels perfectly matches the kinetics of the state T. This original finding evidences the formation of trions through nonradiative relaxation via the $$X$$ X level, rather than via a direct optical excitation from the ground energy state of nanotubes.

Purity Evaluation of Single-Walled Carbon Nanotubes Using Thermogravimetric Analysis

2013 ◽  
Vol 51 (2) ◽  
pp. 137-144
Author(s):  
Naesung Lee ◽  
Jeung Choon Goak ◽  
Tae Yang Kim ◽  
Jongwan Jung ◽  
Young-Soo Seo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermogravimetric Analysis ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Purity Evaluation ◽  
Walled Carbon Nanotubes
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