標題: Synthesis of IrO(2)decorated core-shell PS@PPyNH(2)microspheres for bio-interface application
作者: Hsieh, Tsung-Lin
Hung, Pei-Sung
Wang, Chuan-Jyun
Tso, Kuang-Chih
Wang, Han-Yi
Cheng, Chien-Tai
Lin, Yu-Che
Chung, Ren-Jei
Wei, Kung-Hwa
Wu, Pu-Wei
Chen, Po-Chun
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: core-shell;polystyrene;polypyrrole;IrO2;bio-stimulating electrode
公開日期: 11-Sep-2020
摘要: In this paper, an effective approach is demonstrated for the fabrication of IrO2-decorated polystyrene@functionalized polypyrrole (core@shell; PS@PPyNH2) microspheres. The synthesis begins with the preparation of monodispersive PS microspheres with a diameter of 490 nm, by a process of emulsifier-free emulsion polymerization, followed by a copolymerization process involving pyrrole and PyNH(2)monomers in a PS microsphere aqueous suspension, to produce uniform PS@PPyNH(2)microspheres with a diameter of 536 nm. The loading of 2 nm IrO(2)nanoparticles onto the PS@PPyNH(2)microspheres can be easily adjusted by tuning the pH value of the IrO(2)colloidal solution and the PS@PPyNH(2)suspension. At pH 4, we successfully obtain IrO2-decorated PS@PPyNH(2)microspheres via electrostatic attraction and hydrogen bonding simultaneously between the negatively-charged IrO(2)nanoparticles and the positively-charged PS@PPyNH(2)microspheres. These IrO2-decorated PS@PPyNH(2)microspheres exhibit a characteristic cyclic voltammetric profile, similar to that of an IrO(2)thin film. The charge storage capacity is 5.19 mA cm(-2), a value almost five times greater than that of PS@PPyNH(2)microspheres. In addition, these IrO2-decorated PS@PPyNH(2)microspheres exhibit excellent cell viability and biocompatibility.
URI: http://dx.doi.org/10.1088/1361-6528/ab9678
http://hdl.handle.net/11536/154908
ISSN: 0957-4484
DOI: 10.1088/1361-6528/ab9678
期刊: NANOTECHNOLOGY
Volume: 31
Issue: 37
起始頁: 0
結束頁: 0
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