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. Author manuscript; available in PMC: 2008 Oct 18.
Published in final edited form as: J Control Release. 2007 Aug 16;123(1):19–26. doi: 10.1016/j.jconrel.2007.08.006

Fig. 1.

Fig. 1

Schematic diagram depicting the central concept of flower-like pH-sensitive micelles based on PLA-b-PEG-b-polyHis triblock copolymer. During circulation in blood micelles preserve a flower-like shape but at the tumor site micelles undergo interior swelling and triggers antitumor drug release.