Fig. 7.

Construction of diverse smart PLL-based drug delivery systems. (A) The prodrug micelles with their pH-triggered charge conversion and drug delivery. Reproduced with permission from Ref. [163], copyright 2018, Elsevier. (B) Programmable delivery of CPT with charge conversion and reduction-responsive drug release. Reproduced with permission from Ref. [199], copyright 2017, American Chemical Society. (C) Hydrogen bonding-enhanced micelles for encapsulation and NIR-triggered release of DOX. Reproduced with permission from Ref. [200], copyright 2018, American Chemical Society.