Fig. 5. Super-localization and super-resolution imaging of single CNTs using photocontrolled luminescence intermittency.
Wide-field NIR zoomed images of (10,2) CNTs spin-coated on PVP illuminated with a 730 nm circular polarized laser (~10 kW/cm2). The zoomed regions of interests correspond to reconstructed super-localization of individual CNTs (A) and super-resolved image of closely located nanotubes (B) using intensity transitions from all the blinking steps in the acquired movies (20 Hz). The super-resolved image shows different nanotube segments ~320 nm apart that could not be resolved in the wide-field image. For display, each localization is convolved with a Gaussian having a ωFWHM = 50 nm.