Process

Average (nm)

Standard deviation s

Before milling

170.0 ± 4.6

0.31

NP1

133.6 ± 6.6

0.42

NP2

142.8 ± 8.2

0.23

SP1

93.5 ± 7.3

0.47

SP2

86.5 ± 6.1

0.46