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. Author manuscript; available in PMC: 2013 May 1.
Published in final edited form as: Biotechnol Bioeng. 2012 Jan 24;109(5):1336–1346. doi: 10.1002/bit.24408

Figure 4.

Figure 4

Zeta potential measurements of PAE-GNRs and PEI25k-GNRs at an optical density of 0.0025 a.u. with and without pGL3 plasmid DNA. As the loaded plasmid DNA amount increases zeta potential decreases due to the anionic nature of DNA.