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Bilayer Nanomesh Structures for Transparent Recording and Stimulating Microelectrodes
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2017-11-02 , DOI: 10.1002/adfm.201704117 Yi Qiang 1 , Kyung Jin Seo 1 , Xuanyi Zhao 1 , Pietro Artoni 2 , Negar H. Golshan 3 , Stanislav Culaclii 4 , Po-Min Wang 4 , Wentai Liu 4 , Katherine S. Ziemer 3 , Michela Fagiolini 2 , Hui Fang 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2017-11-02 , DOI: 10.1002/adfm.201704117 Yi Qiang 1 , Kyung Jin Seo 1 , Xuanyi Zhao 1 , Pietro Artoni 2 , Negar H. Golshan 3 , Stanislav Culaclii 4 , Po-Min Wang 4 , Wentai Liu 4 , Katherine S. Ziemer 3 , Michela Fagiolini 2 , Hui Fang 1
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Nanomeshed forms of metal have emerged as a promising biocompatible electrode material for future soft bioelectronics. However, metal/electrolyte interfaces are intrinsically capacitive, severely limiting their electrochemical performance, especially for scaled electrodes, which are essential for high‐resolution brain mapping. Here, an innovative bilayer nanomesh approach is demonstrated to address this limitation while preserving the nanomesh advantage. Electroplating low‐impedance coatings on a gold nanomesh template achieves an impedance < 30 kΩ at 1 kHz and a charge injection limit of 1 mC cm−2 for 80 × 80 µm2 microelectrodes, a 4.3× and 12.8× improvement over uncoated electrodes, respectively, while maintaining a transparency of ≈70% at 550 nm. Systematic characterization of transmittance, impedance, charge injection limits, cyclic charge injection, and light‐induced artifacts reveal an encouraging performance of the bilayer nanomesh microelectrodes. The bilayer nanomesh approach presented here is expected to enable next‐generation large‐scale transparent bioelectronics with broad utility in biology.
中文翻译：
用于透明记录和刺激微电极的双层纳米网结构。
纳米网状金属已成为未来的软生物电子学的有希望的生物相容性电极材料。但是，金属/电解质界面本质上是电容性的，从而严重限制了它们的电化学性能，尤其是对于比例缩放的电极而言，这对于高分辨率大脑映射至关重要。在这里，展示了一种创新的双层纳米网方法来解决这一局限性，同时保留了纳米网的优势。上的金纳米模板电镀低阻抗涂层实现的阻抗<30千欧，在1kHz和1三菱商事厘米的电荷注入限制- 2为80×80微米2微电极，分别比未镀膜的电极提高4.3倍和12.8倍，同时在550 nm处保持约70％的透明度。透射率，阻抗，电荷注入极限，循环电荷注入和光致伪像的系统表征揭示了双层纳米网状微电极的令人鼓舞的性能。此处介绍的双层纳米网方法有望实现在生物学中具有广泛应用的下一代大规模透明生物电子学。
更新日期：2017-11-02
中文翻译：
用于透明记录和刺激微电极的双层纳米网结构。
纳米网状金属已成为未来的软生物电子学的有希望的生物相容性电极材料。但是，金属/电解质界面本质上是电容性的，从而严重限制了它们的电化学性能，尤其是对于比例缩放的电极而言，这对于高分辨率大脑映射至关重要。在这里，展示了一种创新的双层纳米网方法来解决这一局限性，同时保留了纳米网的优势。上的金纳米模板电镀低阻抗涂层实现的阻抗<30千欧，在1kHz和1三菱商事厘米的电荷注入限制- 2为80×80微米2微电极，分别比未镀膜的电极提高4.3倍和12.8倍，同时在550 nm处保持约70％的透明度。透射率，阻抗，电荷注入极限，循环电荷注入和光致伪像的系统表征揭示了双层纳米网状微电极的令人鼓舞的性能。此处介绍的双层纳米网方法有望实现在生物学中具有广泛应用的下一代大规模透明生物电子学。
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