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Fig. 2 | Nanoscale Research Letters

Fig. 2

From: Improving Magnetofection of Magnetic Polyethylenimine Nanoparticles into MG-63 Osteoblasts Using a Novel Uniform Magnetic Field

Fig. 2

Characteristics of PEI-SPIO-NPs/pDNA complexes. a TEM of PEI-SPIO-NPs and PEI-SPIO-NPs/pDNA complexes. b Hysteresis loops of SPIO-NPs and PEI-SPIO-NPs/pDNA complexes. c Zeta potential and hydrodynamic diameter of PEI-SPIO-NPs/pDNA complexes at various N/P ratios. d AFM grayscale image and the molecular structure of the PEI-SPIO-NPs/pDNA complexes. Red dots represent the location of the SPIO chemical group, the green dots indicate nitrogen atoms, yellow dots signify carbon atoms and the phosphorus atom is represented by a white circle black dot. e (a) Size distribution of PEI-SPIO-NPs/pDNA complexes and e (b) zeta potential of PEI-SPIO-NPs/pDNA complexes as measured by a Malvern Zetasizer dynamic light scattering instrument. Results are expressed as the mean ± SD (n = 5)

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