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Robust Sandwich‐Structured Nanofluidic Diodes Modulating Ionic Transport for an Enhanced Electrochromic Performance
Advanced Science ( IF 14.3 ) Pub Date : 2018-06-26 , DOI: 10.1002/advs.201800163 Qianqian Zhang 1, 2, 3 , Qirong Liu 2 , Jianxin Kang 3 , Qingjiao Huang 2 , Zhaoyue Liu 3 , Xungang Diao 2 , Jin Zhai 3
Advanced Science ( IF 14.3 ) Pub Date : 2018-06-26 , DOI: 10.1002/advs.201800163 Qianqian Zhang 1, 2, 3 , Qirong Liu 2 , Jianxin Kang 3 , Qingjiao Huang 2 , Zhaoyue Liu 3 , Xungang Diao 2 , Jin Zhai 3
Affiliation
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Biomimetic solid‐state nanofluidic diodes have attracted extensive research interest due to the possible applications in various fields, such as biosensing, energy conversion, and nanofluidic circuits. However, contributions of exterior surface to the transmembrane ionic transport are often ignored, which can be a crucial factor for ion rectification behavior. Herein, a rational design of robust sandwich‐structured nanofluidic diode is shown by creating opposite charges on the exterior surfaces of a nanoporous membrane using inorganic oxides with distinct isoelectric points. Potential‐induced changes in ion concentration within the nanopores lead to a current rectification; the results are subsequently supported by a theoretical simulation. Except for providing surface charges, functional inorganic oxides used in this work are complementary electrochromic materials. Hence, the sandwich‐structured nanofluidic diode is further developed into an electrochromic membrane exhibiting a visual color change in response to redox potentials. The results show that the surface‐charge‐governed ionic transport and the nanoporous structure facilitate the migration of Li+ ions, which in turn enhance the electrochromic performance. It is envisioned that this work will create new avenues to design and optimize nanofluidic diodes and electrochromic devices.
中文翻译：
稳健的三明治结构纳流二极管调节离子传输以增强电致变色性能
仿生固态纳米流体二极管由于在生物传感、能量转换和纳米流体电路等各个领域的可能应用而引起了广泛的研究兴趣。然而，外表面对跨膜离子传输的贡献常常被忽视，这可能是离子整流行为的关键因素。在此，通过使用具有不同等电点的无机氧化物在纳米多孔膜的外表面上产生相反的电荷，展示了坚固的三明治结构纳米流体二极管的合理设计。纳米孔内离子浓度的电势诱导变化导致电流整流；结果随后得到理论模拟的支持。除了提供表面电荷外，这项工作中使用的功能性无机氧化物是互补的电致变色材料。因此，三明治结构的纳米流体二极管进一步发展成电致变色膜，响应氧化还原电位而表现出视觉颜色变化。结果表明，表面电荷控制的离子传输和纳米多孔结构促进了Li +离子的迁移，从而增强了电致变色性能。预计这项工作将为设计和优化纳米流体二极管和电致变色器件创造新途径。
更新日期：2018-06-26
中文翻译：
稳健的三明治结构纳流二极管调节离子传输以增强电致变色性能
仿生固态纳米流体二极管由于在生物传感、能量转换和纳米流体电路等各个领域的可能应用而引起了广泛的研究兴趣。然而，外表面对跨膜离子传输的贡献常常被忽视，这可能是离子整流行为的关键因素。在此，通过使用具有不同等电点的无机氧化物在纳米多孔膜的外表面上产生相反的电荷，展示了坚固的三明治结构纳米流体二极管的合理设计。纳米孔内离子浓度的电势诱导变化导致电流整流；结果随后得到理论模拟的支持。除了提供表面电荷外，这项工作中使用的功能性无机氧化物是互补的电致变色材料。因此，三明治结构的纳米流体二极管进一步发展成电致变色膜，响应氧化还原电位而表现出视觉颜色变化。结果表明，表面电荷控制的离子传输和纳米多孔结构促进了Li +离子的迁移，从而增强了电致变色性能。预计这项工作将为设计和优化纳米流体二极管和电致变色器件创造新途径。
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