Table 1.

SFE values for individual samples.

Density [%]	Depth [µm]	SFE [mJ/m2]
15.86	15.69	42.33
44.14	15.69	46.47
10.00	41.50	47.17
30.00	5.00	48.97
15.86	67.31	49.30
30.00	41.50	50.60
30.00	78.00	53.07
44.14	67.31	53.50
50.00	41.50	58.57