Calculation of optical constants from carbon nanotube transmission spectra

Pekker, Áron and Borondics, F. and Kamarás, Katalin (2006) Calculation of optical constants from carbon nanotube transmission spectra. PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 243. pp. 3485-3488. ISSN 0370-1972*

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Abstract

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.

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