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Synthesis of IrO2 decorated core-shell PS@PPyNH2 microspheres for bio-interface application
Tsung-Lin Hsieh1, Pei-Sung Hung1, Chuan-Jyun Wang1
1Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 300, Taiwan, Republic of China.
Nanotechnology
|May 27, 2020
Summary
This study presents a novel method for creating iridium oxide (IrO2)-decorated polystyrene@functionalized polypyrrole (PS@PPyNH2) core@shell microspheres. The resulting microspheres show enhanced charge storage capacity and excellent biocompatibility.
Area of Science:
- Materials Science
- Nanotechnology
- Electrochemistry
Background:
- Developing advanced materials for energy storage and biomedical applications is crucial.
- Core@shell microspheres offer unique properties for various applications.
- Iridium oxide (IrO2) nanoparticles are known for their catalytic and electrochemical properties.
Purpose of the Study:
- To develop an effective approach for fabricating IrO2-decorated PS@PPyNH2 core@shell microspheres.
- To investigate the electrochemical properties and biocompatibility of the synthesized microspheres.
Main Methods:
- Fabrication of monodisperse polystyrene (PS) microspheres via emulsifier-free emulsion polymerization.
- Copolymerization of pyrrole and PyNH2 monomers onto PS microspheres to form PS@PPyNH2 core@shell structures.
- Decoration of PS@PPyNH2 microspheres with 2 nm IrO2 nanoparticles through pH-controlled electrostatic attraction and hydrogen bonding.
Main Results:
- Uniform PS@PPyNH2 microspheres (536 nm) were synthesized, followed by successful decoration with IrO2 nanoparticles.
- The IrO2-decorated PS@PPyNH2 microspheres displayed a cyclic voltammetric profile characteristic of IrO2 thin films.
- Achieved a charge storage capacity of 5.19 mA cm-2, nearly five times higher than unmodified PS@PPyNH2 microspheres.
- Demonstrated excellent cell viability and biocompatibility of the synthesized IrO2-decorated microspheres.
Conclusions:
- The developed method provides an effective route for producing IrO2-decorated PS@PPyNH2 microspheres.
- These microspheres exhibit significantly enhanced electrochemical performance and good biocompatibility.
- The findings suggest potential applications in energy storage devices and biomedical fields.
