297564.fig.008
Figure 8: FT-IR spectra of 60-layer o-NpSB LB films before and after immersion in 10.0 mM Cu(Ac)2 solution at different time intervals. The line (a) represents the spectrum of a 60-layer complex Cu(o-NpSB) LB films fabricated from pure water interface. The line (b) represents the spectrum of a 50-layer o-NpSB LB films fabricated from 1.0 mM aqueous Cu(Ac)2 subphase.