Fig. 2From: High Seebeck Coefficient of Porous Silicon: Study of the Porosity DependenceCross-sectional SEM images of PSi membranes with three different porosities. Porous Si membranes with porosities 40, 46 and 70 % are depicted in a, b and c, respectively. The same images are depicted at higher magnification in the corresponding insets Back to article page