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. 2018 Jun 1;13:3251–3261. doi: 10.2147/IJN.S156346

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© 2018 Kang et al. This work is published and licensed by Dove Medical Press Limited

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Characterization of PDA and PDA–melittin nanoparticles.

Notes: (A) A scheme of the self-assembly process of PDA nanoparticles with bilayer structure. PCDA was self-assembled into colorless nanoparticles after probe sonication at 70°C. Polymerization of PCDA via a 1,4-addition reaction was achieved by UV irradiation at 254 nm, forming a blue polymer with alternating double-triple bond. (B) Transmission electron microscopy image of PDA nanoparticles. (C) UV spectrum of PDA nanoparticles. (D, E) The particle size distribution spectrum and the zeta potential distribution spectrum of PDA nanoparticles. (F, G) The particle size distribution spectrum and the zeta potential distribution spectrum of PDA–melittin nanoparticles. The test temperature was 25°C.

Abbreviations: PDA, polydiacetylene; PCDA, 10,12-pentacosadiynoic acid; NP, nanoparticle.