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. 2016 Jun 30;8(7):249. doi: 10.3390/polym8070249

Figure 5.

Figure 5

Design of stably doped PANI nanoshells. (a) Schematic illustrating conventional loosely packed PANI (spaghetti-like). The PANI layer loses its signature properties owing to dopant leaching at neutral pH; (b) Densely packed brush PANI with excellent doping stability; (c,d) Transmission electron microscope (TEM) showing the successful coating of PANI nanoshells on MNPs. Scale bar, 100 nm; (e) Diagram illustrating a high-density PANI brush polymerized on an intermediate PDA layer. Protons (red dots) and SDS (gold wires) are stably trapped owing to the strong interactions between the conjugate polymer chains and dopants; (f) TEM showing PDA-PANI dual shell layers on a MNP. Scale bar, 20 nm. Reprinted with permission from [42]. Copyright 2015, American Chemical Society. MNPs: magnetic NPs; PDA: polydopamine; SDS: sodium dodecyl sulfate.