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. Author manuscript; available in PMC: 2010 Aug 31.
Published in final edited form as: Colloids Surf B Biointerfaces. 2009 Oct 2;75(2):565–572. doi: 10.1016/j.colsurfb.2009.09.037

Table 3.

QCM-D data of the silificated S-layer (KOH) after washing procedure with water (±σ)

n EDC EDC/EDA Non-activated
Frequency, Δf [Hz] 3 13.9 ± 0.3 8.6 ± 0.2 2.0 ± 0.0
5 13.1 ± 0.3 6.5 ± 0.2 2.5 ± 0.1
7 12.0 ± 0.3 5.6 ± 0.1 1.1 ± 0.0
Dissipation, D [×106] 3 0.3 ± 0.0 0.3 ± 0.0 0.1 ± 0.0
5 0.5 ± 0.1 0.6 ± 0.1 0.1 ± 0.1
7 0.6 ± 0.0 0.3 ± 0.0 0.3 ± 0.0
Mass, m [ng cm−2] 5 219 ± 5.3 142 ± 3.5 46 ± 1.8
Thickness, d [nm] 5 1.2 ± 0.2 0.6 ± 0.1 0.2 ± 0.1
Viscosity, V [Pa s] 5 0.0053 ± 0.0001 0.0049 ± 0.0001 0.0059 ± 0.0001
Shear force, S [105 Pa] 5 1.0 ± 0.2 1.4 ± 0.2 1.6 ± 0.2