Figure 2.

Typical FTIR (A) and ¹H NMR spectra (B) showing the successful crosslink formation between PN and KGN, and the enhanced peaks at 1703 cm⁻¹ (A) and 7.2 ppm (B) indicating the formation of amide bonds in PN-KGN. Transmission electron micrographs of PN-KGN, bar = 200 nm (C). In vitro release of KGN from PN-KGN at 37 °C (D).