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High‐pressure optical study of bromine‐doped single‐walled carbon nanotube films
Author(s) -
Strauch J.,
Anis B.,
Kuntscher C. A.
Publication year - 2014
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.201451160
Subject(s) - carbon nanotube , raman spectroscopy , bromine , materials science , doping , optical properties of carbon nanotubes , absorption spectroscopy , absorption (acoustics) , selective chemistry of single walled nanotubes , spectroscopy , nanotube , analytical chemistry (journal) , nanotechnology , chemistry , composite material , optics , optoelectronics , organic chemistry , physics , quantum mechanics , metallurgy
We present a high‐pressure optical spectroscopy study on single‐walled carbon nanotubes (SWCNTs) doped with bromine using nitrogen as pressure transmitting medium. Bromine‐doped SWCNTs (Br‐SWCNTs) with different doping levels were prepared by the gas phase method and characterized by optical and Raman spectroscopy. The absorption and Raman spectra clearly reveal the effects of charge doping by bromine. Like for pristine SWCNTs, the absorption bands of Br‐SWCNTs show a red shift under pressure. Anomalies in the pressure‐induced relative frequency shift indicate structural changes in the nanotubes. The results are compared with those for empty nanotubes.