Figure 6
(a) Absorption spectra recorded around the S11 resonances of the (6.5) nanotubes in fractions C1 to C5; (b) Shifts of the S11 peaks of (6.5) nanotubes deduced from the absorption spectra in (a) as a function of median fraction lengths. The blue curve is a simple theoretical model considering the 1D box model (see text).
