期刊
SURFACE & COATINGS TECHNOLOGY
卷 435, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2022.128271
关键词
Iridium oxide; TiO2@IrO2 ; Core@shell; Nanotube array; Chemical bath deposition; Bio-interface electrode
资金
- Ministry of Science and Technology of Taiwan [MOST 107-2221-E-027-009-MY2, 109-2221-E-027060, MOST 110-2321-B-009-004, 110-2221-E-027-022-MY3]
- Center for Neuromodulation Medical Electronics Systemsfrom The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education in Taiwan
This study develops a wet chemical approach to fabricate space-controllable TiO2@IrO2 core@shell nanotube arrays. The nanotube arrays exhibit large charge storage capacity, good crystallinity, and stability, making them suitable for neural activity applications.
This study develops a wet chemical approach to fabricate space-controllable TiO2@IrO2 core@shell nanotube arrays. The process begins with the space-controlling anodization of the TiO2 nanotube array, followed by a chemical bath deposition of IrO2. IrO2 uniformly covers the nanotubular TiO2 with a thickness range of 8- 15 nm. Charge storage capacity (CSC) and electrochemical impedance spectroscopy (EIS) are performed to evaluate the TiO2@IrO2 core-shell nanotube array as an electrode for neural activity application. Electron microscopy images confirm the formation of uniform IrO2 films on both inner and outer nanotube surfaces. An X-ray diffraction pattern shows a good crystallinity of the TiO2@IrO2 core-shell nanotube array. The TiO2@IrO2 core-shell nanotube array presents a large charge storage capacity of 42.84 mC/cm(2) attributed to the high-aspect-ratio tubular nanostructure with a conformal IrO2 deposition. Additionally, the TiO2@IrO2 core-shell nanotube array exhibits stability, durability, and good biocompatibility.
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