Fig. 1. Nanostructures of self-assembled FF and ff(a, b) SEM images of self-assembled nanostructures of FF (a) and ff (b), (c, d) AFM images (left) of self-assembled nanofibers of FF (c) and ff (d), and linear profiles (right) of the lines shown in AFM images

Fig. 2. CD spectra (a), ratios of secondary structures (b), FTIR spectra (c), fluorescence emission spectra (λ_excitation=259 nm) (d), XRD patterns of unassembled peptide powders (e), and XRD patterns (f) of self-assembled FF and ff peptides (color online)

Fig. 3. Nanostructures of co-assembled FF and ff with various ratiosSEM images (a, c, e) and AFM images (b, d, f) of co-assemblies formed by FF and ff at ratios of 3:1 (a, b), 1:1 (c, d), 1:3 (e, f)

Fig. 4. Spectroscopic analysis of co-assembled FF and ff with various ratios(a) CD spectra, (b) Ratios of secondary structures, (c) FTIR spectra, (d) Fluorescence emission spectra (λ_excitation = 259 nm), (e) XRD patterns of co-assembled FF and ff