Journal Highlight: Photoluminescence of single-wall carbon nanotube films

Photoluminescence of single-wall carbon nanotube films

physica status solidi (b) 2010, 247, 2805-2809
Alexander I. Chernov, Elena D. Obraztsova

Abstract: In this work, we report the photoluminescence (PL) studies of the films produced by different methods from pristine single-wall carbon nanotubes (SWNTs). The suspensions of CoMoCAT and HiPCO SWNTs were used to make two different types of films: the polymer films with embedded SWNTs and the SWNT films deposited onto quartz substrates through filtration. A density gradient ultracentrifugation (DGU) has been used for enrichment of the initial carbon nanotube suspensions with semiconducting SWNTs and extraction of various diameter nanotubes to reveal a role of the nanotube interaction in the films. Optical diagnostic techniques including Raman spectroscopy, UV-VIS-NIR absorption spectroscopy, and PL have been used for characterization and comparison of the initial suspensions and films formed from them. A PL mapping has revealed an arrangement of carbon nanotubes inside the films. A cross-linkage between the individual SWNTs appeared to be higher inside the films deposited via filtration than in the polymer films with dispersed SWNTs.

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