Table 1. Zeta (ζ) Potential of Polymer-Modified and Nonmodified Liposomes in Water^a.

ζ potential (mV)	30 °C	37 °C	45 °C
nonmodified liposome	61.7 ± 0.3	64.4 ± 0.4	62.4 ± 2.9
PEGylated liposome	53.5 ± 4.7	54.1 ± 4.3	61.0 ± 2.2
P(NIPAAm-co-DMAPAAm)-modified liposome	28.2 ± 0.4	38.7 ± 0.3	47.9 ± 1.3

^aMean ± SD, n = 3.