Light-induced quantum friction of carbon nanotubes in water

Preparation of SWCNTs If not stated otherwise, all chemicals were purchased from Sigma Aldrich (Germany). Unless specifically stated, all experiments were performed with (6,5)-enriched SWCNTs (Sigma Aldrich, Signis SG65i, CoMoCAT synthesis technology). For DNA-functionalized SWCNTs 150 µl of 2 mg ml −1 single-stranded DNA (for example, (GT) 10 ) in 1× PBS buffer (pH 7.4) was mixed with 75 µl of 2 mg ml −1 SWCNT in PBS and 75 µl PBS, followed by tip sonication (Fisher Scientific, FB120, 120 W, …