Fig. 8From: Preparation of bilayer tissue-engineered polyurethane/poly-L-lactic acid nerve conduits and their in vitro characterization for use in peripheral nerve regenerationThe FTIR-ATR spectroscopy. Chemical structure of PLA, PU, PU/MWCNT, and PLA/PU/MWCNT nanofibers. Remarkable functional groups in each sample are denoted by starsBack to article page