Regulating Nonlinear Ion Transport through a Solid-State Pore by Partial Surface Coatings
Regulating Nonlinear Ion Transport through a Solid-State Pore by Partial Surface Coatings
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通过部分表面涂层调节通过固态孔的非线性离子传输
DOI：
10.1021/acsami.2c19485
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Taniguchi Masateru
中科院分区：
文献类型：
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作者：
Leong Iat Wai;Tsutsui Makusu;Yokota Kazumichi;Murayama Sanae;Taniguchi Masateru
使用功能性纳米流体设备来操纵离子传输，使我们能够探索蓝色能量采集器和离子电子构建模块的纳米级发展。在此，我们报告的方法来改变非线性离子电流通过一个孔的部分介电涂层。在通道的内表面和外表面上检查各种介电材料，具有四种不同的涂覆或未涂覆表面图案。通过控制表面电荷的特定部分，孔可以表现得像电阻器、二极管和双极结型晶体管。我们用数值模拟的方法来找出离子在孔中不对称输运的原因，并说明了特定的带电表面和电渗流之间的关系。这些发现有助于理解相应的表面组成在离子传输中的作用，这提供了一种直接的方法来通过介电涂层修改基于通道的设备中的电致流动驱动的离子电流整流。
Using functional nanofluidic devices to manipulate ion transport allows us to explore the nanoscale development of blue energy harvesters and iontronic building blocks. Herein, we report on a method to alter the nonlinear ionic current through a pore by partial dielectric coatings. A variety of dielectric materials are examined on both the inner and outer surfaces of the channel with four different patterns of coated or uncoated surfaces. Through controlling the specific part of the surface charge, the pore can behave like a resistor, diode, and bipolar junction transistor. We use numerical simulations to find out the reason for the asymmetric ion transport in the pore and illustrate the relationship between specifically charged surfaces and electroosmotic flow. These findings help understand the role of the corresponding surface composition in ion transport, which provides a direct approach to modify the electroosmotic-flow-driven ionic current rectification in the channel-based device via dielectric coatings.