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Synthesis of IrO2 decorated core-shell PS@PPyNH2 microspheres for bio-interface application
Nanotechnology ( IF 3.5 ) Pub Date : 2020-06-30 , DOI: 10.1088/1361-6528/ab9678
Tsung-Lin Hsieh , Pei-Sung Hung , Chuan-Jyun Wang , Kuang-Chih Tso , Han-Yi Wang , Chien-Tai Cheng , Yu-Che Lin , Ren-Jei Chung , Kung-Hwa Wei , Pu-Wei Wu , Po-Chun Chen

An effective approach is demonstrated for the fabrication of IrO2-decorated polystyrene@functionalized polypyrrole (core@shell; PS@PPyNH2) microspheres. The synthesis starts with the preparation of monodispersive PS microspheres in diameter of 490 nm by an emulsifier-free emulsion polymerization, followed by a copolymerization involving pyrrole and PyNH2monomers in a PS microsphere aqueous suspension to produce uniform PS@PPyNH2 microspheres in diameter of 536 nm. The loading of 2 nm IrO2nanoparticles on the PS@PPyNH2microspheres is readily adjusted by tuning the pH value of IrO2colloidal solution and PS@PPyNH2suspension. At pH 4, we successfully obtain IrO2-decorated PS@PPyNH2microspheres via electrostatic attraction and hydrogen bonding simultaneously between the negatively-charged IrO2nanoparticles and positively-charged PS@PPyNH2microspheres. These IrO2-decorated PS@PPyNH2microspheres exhibit a characteristic cyclic voltammetric profile, similar to that of IrO2 thin film. The charge storage capacity is 5.19 mA/cm2, a value that is almost five times greater than that of PS@PPyNH2microspheres. In addition, these IrO2-decorated PS@PPyNH2microspheres reveal excellent cell viability and biocompatibility.

中文翻译:

用于生物界面应用的 IrO 2装饰核壳 PS@PPyNH 2微球的合成

证明了一种制备 IrO2 装饰的聚苯乙烯@功能化聚吡咯(核@壳;PS@PPyNH2)微球的有效方法。该合成首先通过无乳化剂乳液聚合制备直径为 490 nm 的单分散 PS 微球,然后在 PS 微球水悬浮液中涉及吡咯和 PyNH2 单体的共聚,以产生直径为 536 nm 的均匀 PS@PPyNH2 微球。通过调节 IrO2 胶体溶液和 PS@PPyNH2 悬浮液的 pH 值,可以很容易地调整 PS@PPyNH2 微球上 2 nm IrO2 纳米颗粒的负载。在 pH 4 时,我们通过带负电荷的 IrO2 纳米粒子和带正电荷的 PS@PPyNH2 微球之间的静电引力和氢键同时成功地获得了 IrO2 修饰的 PS@PPyNH2 微球。这些 IrO2 装饰的 PS@PPyNH2 微球表现出特征循环伏安曲线,类似于 IrO2 薄膜。电荷存储容量为 5.19 mA/cm2,几乎是 PS@PPyNH2 微球的五倍。此外,这些 IrO2 修饰的 PS@PPyNH2 微球显示出优异的细胞活力和生物相容性。
更新日期:2020-06-30
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