of SELP/MPEO were analyzed by field
emission scanning electron microscopy (FE-SEM). Cu–C grids
were immersed in the casting solutions and analyzed in an ultrahigh-resolution
FE-SEM_EDS/EBSD (Nova 200 NanoSEM, Fei; Pegasus X4M, EDAX) with an
acceleration voltage of 17.5 kV and a scanning transmitted electron
microscopy (STEM) detector. For scanning electron microscopy (SEM)
analysis of the SELP/MPEO biocomposites, film samples were
coated with a gold layer using a sputter coater and visualized in
a JSM-6010 LV (JEOL, Japan).