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Table 1 Zeta-potentials.

From: Silica nanoparticles for the layer-by-layer assembly of fully electro-active cytochrome c multilayers

SiO2-nanoparticles

Bare

SiO2 spheres

Modified SiO2-NH2 spheres

Modified SiO2-CO2H spheres

Zeta-potential (mV)

-41.44

+39.63

-54.71

  1. Zeta-potentials of the synthesized and modified SiNPs