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. Author manuscript; available in PMC: 2011 Sep 28.
Published in final edited form as: ACS Nano. 2010 Sep 28;4(9):5505–5511. doi: 10.1021/nn101638u

Figure 1.

Figure 1

Zeta-potential of colloidal AuNPs (A) and UV–vis spectra of MUA-AuNPs (a), PEI/MUA-AuNPs (b), PAH-Cit/PEI/MUA-AuNPs (c), and PEI/PAH-Cit/PEI/MUA-AuNPs (d) in 10 mM HEPES buffer at pH 7.4 (B).