Laser-Resonance Chirality Selection in Single-Walled Carbon Nanotubes

摘要

Laser Resonance Chirality Selection method has been proposed to select single-walled carbon nanotubes (SWNTs) with specific chirality from mass of SWNTs by intense laser irradiation. Absorption of the exciting laser beam is strongly enhanced for SWNTs with specific chirality when the laser excitation energy is close to the energy separation in the density of states. As a result of the resonance effect, at a certain threshold excitation power density, only these SWNTs can be oxidized and be removed selectively. We have demonstrated with Raman scattering measurements that SWNTs with specific chirality are selectively removed after intense laser irradiation.