Figure 6

Emission spectra of A, B, C and D nanofibers excited at (a) 239, (b) 276, (c) 296 and (d) 327 nm, respectively. Insets: fluorescence photos of B nanofibers under different excitation wavelengths, respectively.

Emission spectra of A, B, C and D nanofibers excited at (a) 239, (b) 276, (c) 296 and (d) 327 nm, respectively. Insets: fluorescence photos of B nanofibers under different excitation wavelengths, respectively.