Doping single wall carbon nanotubes with differently charged porphyrins

2008/09/25 by G. A. M. Sáfar, Henrique B. Ribeiro, H. B. Ribeiro +17
Engineering · Materials Science · Physics and Astronomy · #Carbon Nanotubes in Composites #Molecular Junctions and Nanostructures #Porphyrin and Phthalocyanine Chemistry #cond-mat.mtrl-sci #cond-mat.other

paper · pdf · doi:10.48550/arxiv.0809.4498

arxiv created 2008/09/25 · arxiv updated 2009/12/01

Abstract

Photoluminescence (PL) measurements of porphyrin-doped single wall carbon nanotubes (SWNT) were studied in sodium dodecylbenzenesulfonate (NaDDBS) aqueous dispersions. The PL spectra were used to draw PL maps were the maxima corresponds to absorption-emission excitonic processes related to (E11, E22) first Van Hove singularities of the SWNT electronic structure. The influence of the net charge of the porphyrin was a determinant factor in the energy map maximum shifts (EMMS) compared to the energy map of a pristine NaDDBS/SWNT dispersion. A non-interacting porphyrin is used as a reference to discard the influence of the dielectric constant of the medium in the EMMS.

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