PCL was added to a round bottom flask equipped with a stir bar. DCM was added to a ratio of 20% w/v PCL, and the mixture stirred for 30 min to ensure adequate dissolution. A stock solution of [n]CPP in DCM (1 mg.mL -1 ) was prepared and injected into the mixture at the desired concentration. The resulting mixture was stirred for 30 min before the stir bar was removed and the solvent was removed under vacuum for several hours. To maximize the adequate removal of solvent, [n]CPP embedded PCL samples were subjected to molten thin film (<0.5mm) spreading and placed in a vacuum oven at 80 °C for 7 days before use.