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Polymer directed self-assembly of pH-responsive antioxidant nanoparticles

Author(s): Tang, C; Amin, D; Messersmith, PB; Anthony, JE; Prud homme, Robert K

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Abstract: We have developed pH-responsive, multifunctional nanoparticles based on encapsulation of an antioxidant, tannic acid (TA), using flash nanoprecipitation, a polymer directed self-assembly method. Formation of insoluble coordination complexes of tannic acid and iron during mixing drives nanoparticle assembly. Tuning the core material to polymer ratio, the size of the nanoparticles can be readily tuned between 50 and 265 nm. The resulting nanoparticle is pH-responsive, i.e., stable at pH 7.4 and soluble under acidic conditions due to the nature of the coordination complex. Further, the coordination complex can be coprecipitated with other hydrophobic materials such as therapeutics or imaging agents. For example, coprecipitation with a hydrophobic fluorescent dye creates fluorescent nanoparticles. In vitro, the nanoparticles have low cytotoxicity and show antioxidant activity. Therefore, these particles may facilitate intracellular delivery of antioxidants.
Publication Date: 2015
Citation: Tang, C, Amin, D, Messersmith, PB, Anthony, JE, Prud homme, RK. (2015). Polymer directed self-assembly of pH-responsive antioxidant nanoparticles. Langmuir, 31 (3612 - 3620. doi:10.1021/acs.langmuir.5b00213
DOI: doi:10.1021/acs.langmuir.5b00213
Pages: 3612 - 3620
Type of Material: Journal Article
Journal/Proceeding Title: Langmuir
Version: Author's manuscript

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