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UV melting profiles of triplex DNA polydA (polydT)2 in the absence (black) or presence of SWNTs: SWNTs 1 µg ml−1 (red); 2 µg ml−1 (green); 5 µg ml−1 (blue); 10 µg ml−1 (cyan) in Tris buffer (10 mM Tris, 200 mM NaCl, pH = 7.1). Normalized absorption changes at 260 nm were plotted against temperature. The data were collected at a heating rate of 0.5°C min−1.
