Figure 2

B3LYP/LANL2DZ calculated MESP for the studied model molecules whereas, (a) PLA, (b) GO, (c) PLA/GO composite, (d) PLA/GO/ZnO (Terminal OH), (e) PLA/GO/OZn (Terminal OH), (f) PLA/GO/ZnO (Inner OH), (g) PLA/GO/OZn (Inner OH), (h) PLA/GO/2ZnO (Terminal and Inner OH) and (i) PLA/GO/2OZn (Terminal and Inner OH).