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Optical Properties of Single‐Walled Carbon Nanotubes Doped in Acid Medium
Author(s) -
Eremin Timofei,
Obraztsova Elena
Publication year - 2018
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201700272
Subject(s) - photoluminescence , carbon nanotube , materials science , trion , doping , raman spectroscopy , optical properties of carbon nanotubes , band gap , absorption (acoustics) , absorption spectroscopy , aqueous solution , nanotechnology , photochemistry , analytical chemistry (journal) , optoelectronics , optics , chemistry , nanotube , organic chemistry , composite material , physics
We report a detailed study of changes in optical properties of single‐walled carbon nanotubes caused by doping in acid medium and their comparison with those induced by other doping techniques. In this work, a hydrochloric acid was added to the aqueous suspension of nanotubes wrapped with sodium cholate. Additionally to the shift and suppression of several modes in the Raman spectrum and the suppression of the first optical transition in the optical absorption spectrum, we have observed an appearance of a trion band in the photoluminescence spectrum with the energy about 0.2 eV less than the main photoluminescence band.