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Table 1 Characterization of Au–Fe3O4 before and after PLL coating

From: Polymer coated gold-ferric oxide superparamagnetic nanoparticles for theranostic applications

Samples

ζ-potential (mV) in various biological medium

PDI

Water

PBS

Cell culture medium

PBS + 10% FBS

Au–Fe3O4

0.856 ± 0.07

− 7.9 ± 0.8

− 12 ± 7

− 3.4 ± 5.2

− 4.8 ± 2.6

PLL–Au–Fe3O4

0.539 ± 0.03

35 ± 10

26 ± 8.5

15.8 ± 9.2

16 ± 6.8