Figure 3
From: Laser-based imaging of individual carbon nanostructures
(a) Confocal Rayleigh imaging and spectroscopy of a suspended nanotube. (Top) The nanotube is illuminated at a focused spot by a white broadband source (supercontinuum laser), but the scattered light is colored (yellow) due to enhancement of scattering at certain wavelengths. (Bottom) The spectrum of Rayleigh-scattered light from a single SWNT, which exhibits sharp peaks. Adapted from Ref. 24 (© 2004 AAAS). (b) A color image of many nanotubes on a quartz substrate, where the colors correspond to the energies at which Rayleigh scattering is the strongest. The nanotubes were illuminated in a wide-field geometry, but scattering from the substrate was suppressed by covering the sample with an index-matching medium (see inset). (c) Individual spectra and chirality assignments for nanotubes obtained by wide-field Rayleigh imaging, showing similar features to (a). Adapted from Ref. 15 (© 2011 ACS).
