Abstract
In the present work the influence of reducing agent dithiothreitol doping on photoluminescence spectra of nanotubes with adsorbed biopolymers (single-stranded DNA and polyC) in aqueous suspensions and films was studied. It is revealed that greater intensity enhancement at 10−3 mol/L dithiothreitol concentration is observed for (7,5) and (6,5) nanotubes in suspension with single-stranded DNA (by more than 150% of initial intensity) comparing to polyC suspension (less than 60%) while for (6,4) and (9,1) nanotubes enhancement is less than 50% for both suspensions. Photoluminescence intensity increasing for nanotube film with DNA is less than 50% without noticeable dependence on nanotube chirality. It is assumed, that different influence of biopolymers on nanotube luminescence intensity enhancement is due to their different coverage of nanotube surface.
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Original Russian Text © N.V. Kurnosov, A.S. Linnik, V.S. Leontiev, V.A. Karachevtsev, 2014, published in Optika i Spektroskopiya, 2014, Vol. 117, No. 3, pp. 443–449.
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Kurnosov, N.V., Linnik, A.S., Leontiev, V.S. et al. Enhancement of single-walled nanotubes luminescence intensity upon dithiothreitol doping. Opt. Spectrosc. 117, 428–433 (2014). https://doi.org/10.1134/S0030400X14090148
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DOI: https://doi.org/10.1134/S0030400X14090148