Fig. 5

FESEM images of c-rGO/CuNWs with a 1 dipping cycle and b 5 dipping cycles. The open spaces between nonuniform c-rGO layers result in accelerated corrosion of CuNWs. FESEM images of h-rGO/CuNWs with c 1 dipping cycle and d 5 dipping cycles. The h-rGO/CuNWs with more dipping cycles shows large-area and uniform coverage of h-rGO layers on CuNWs surface