Table 2

Size distribution, zeta potential, and elementary analysis of the nanoparticles

Type of formulation

Size (nm)

Zeta potential (mV)

Atom% - O

Atom% - N

Atom% - P

PLGA

50 ± 6

-21.4 ± 1.8

49% (± 0.74)

0% (± 0)

0% (± 0)

PLGA-PEI

57 ± 7

29.4 ± 2.6

42% (± 0.63)

4.7% (± 0.32)

0% (± 0)

PLGA-PEI/pDNA(N/P = 6)

60 ± 7

23.7 ± 2.3

41% (± 0.98)

4.1% (± 0.43)

1.1% (± 0.13)

Liang et al. Nanoscale Research Letters 2011 6:447   doi:10.1186/1556-276X-6-447