2.5.4. Scanning electron microscopy (SEM)
The surface morphology of the papers was examined using scanning
electron microscopy (SEM), using a FEI Quanta 200 scanning
electron microscope (FEI Company, Eindhoven, the Netherlands).
Samples were previously coated with gold using “Sputta Coater
S150” under vacuum. SEM was carried out to give further insight
on homogeneity of the coatings. All samples were examined using
an accelerating voltage of 20 kV.