Fig. 4

Scheme of the platelets solution in pyrrolidine (a). Evolution of the intensity of the absorbed light (λ = 900 nm) with time for a mixture of platelets in IPA and pyrrolidine (b). The extinction intensity was measured every 3 s. The UV–vis spectra of the sample before and after the filtration through a filter with a pore size of 20 nm is shown in (c)