ATR-FTIR: Attenuated total reflection -Fourier transform infrared (ATR-FTIR) spectroscopy was used to analyze the presence and content of β-sheets and α-helices and the effect of the CNCs on the secondary structures in the peptidic APCNs and peptidic triblock copolymers using a Spectrum3 spectrometer (Perkin Elmer) equipped with a UATR-Diamant/ZnSe-topplate. All samples were measured in absorbance mode with 128 scans. MicroLab was used to obtain and analyze the spectra.