Single-nanotube photoluminescence imaging was performed with an inverted microscope equipped with an NA of 1.40 and 60× objective. A volume of 10-μl drop of SP-CNT suspension was spin-coated on polyvinylpyrrolidone-coated glass coverslips to have isolated nanotubes. The excitation source consisted of a tunable Ti:Sa laser emitting at a wavelength of 730 nm to preferentially excite (10,2) CNTs at the resonance excitation on the second-order transition (S22). The excitation intensity was kept at 10 kW/cm2 with circularly polarized light. CNTs were detected by an InGaAs camera (Xenics XEVA 1.7-320 TE3) at 20 frames/s with a pixel size of 0.49 μm. A band-pass filter Z1064/10x (Chroma) was used to detect the (10,2) CNT–emitted fluorescence. An epifluorescence white light excitation illumination with FF01-387/11 (Semrock) was used for the UV illumination.

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