Straight paddle
Rushton turbine
Zinc oxide
L = 96 nm
L = 87 nm
d = 26 nm
d = 28 nm
L/d = 3.7
L/d = 3.1
Cobalt-nickel
L = 270 nm
L = 170 nm d = 7.6 nm L/d = 22
d = 6.5 nm L/d = 42