Figure 3.

Surface charges (zeta potential) of the corresponding modified MNPs at neutral pH value (pH =7).
Abbreviations: HLC, human-like collagen; MNPs, magnetite NPs; NPs, nanoparticles.

Surface charges (zeta potential) of the corresponding modified MNPs at neutral pH value (pH =7).
Abbreviations: HLC, human-like collagen; MNPs, magnetite NPs; NPs, nanoparticles.