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Calculation of optical constants from carbon nanotube transmission spectra
Author(s) -
Pekker Á.,
Borondics F.,
Kamarás K.,
Rinzler A. G.,
Tanner D. B.
Publication year - 2006
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.200669141
Subject(s) - carbon nanotube , transmittance , infrared , materials science , spectral line , nanotube , absorption (acoustics) , far infrared , absorption spectroscopy , infrared spectroscopy , transmission (telecommunications) , optics , nanotechnology , optoelectronics , chemistry , physics , telecommunications , composite material , computer science , organic chemistry , astronomy
We want to clarify a few issues about using optical absorption spectra for characterizing carbon nanotubes. The common method of using optical density for nanotube counting is reasonable in the near‐infrared and visible spectral region, but fails for the mid and far infrared, where metallic tubes can be unambigously detected. By performing Kramers–Kronig transformation on wide‐range transmittance spectra of free‐standing films, the far‐infrared spectral region creates a unique possibility for estimating the amount of metallic tubes in different nanotube networks. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)