One can see from Fig. 5a that the peak absorbance goes up with an increase in the spinning
speed (see also Fig. 9a). Also, there is an increase in the ratio of the peak absorbance of the monomer (at λ=425) and the dimer (at λ= 370) (see also Fig. 8). This behavior still dominates when the films were spun for two layers (Fig. 5b). One notices also that the absorption spectra at the lowest speed were almost without structure, while at higher speeds they became more structured.