Figure 5
(a) PL microscopy image of Ac-Aβ16–21-Am drop-casted on a clean coverslip glass in the DAPI region. The scale bar is 50 μm. (b) Representative normalized PL spectra of the two characterized Aβ16–21 peptides at λexc = 330 nm. Analogously to Fig. 3, the data were normalized with respect to the maximum of the emission spectrum and rescaled within the interval [0,1] in order to highlight the overlap of the spectral features of the Aβ16–21 samples at fixed excitation wavelength. (c) PL spectra of Aβ-peptide films versus the excitation wavelength in the range between 330 and 400 nm. (d) Plots of the PL maxima versus excitation wavelength. Herein, the lines depicted represent a guide to the eye. (e) Excitation spectra of the same samples at different concentrations. For both (d) and (e), continuous lines: 100 mg/mL; dash-dotted lines: 5 mg/mL.
