当前位置：
X-MOL 学术
›
Faraday Discuss.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Unexpected ionic transport behavior in hydrophobic and uncharged conical nanopores
Faraday Discussions ( IF 3.3 ) Pub Date : 2018-02-26 , DOI: 10.1039/c8fd00008e Sebastien Balme 1, 2, 3, 4, 5 , Fabien Picaud 6, 7, 8, 9, 10 , Mathilde Lepoitevin 1, 2, 3, 4, 5 , Mikhael Bechelany 1, 2, 3, 4, 5 , Emmanuel Balanzat 11, 12, 13, 14 , Jean-Marc Janot 1, 2, 3, 4, 5
Faraday Discussions ( IF 3.3 ) Pub Date : 2018-02-26 , DOI: 10.1039/c8fd00008e Sebastien Balme 1, 2, 3, 4, 5 , Fabien Picaud 6, 7, 8, 9, 10 , Mathilde Lepoitevin 1, 2, 3, 4, 5 , Mikhael Bechelany 1, 2, 3, 4, 5 , Emmanuel Balanzat 11, 12, 13, 14 , Jean-Marc Janot 1, 2, 3, 4, 5
Affiliation
|
We investigated ionic transport behavior in the case of uncharged conical nanopores. To do so, we designed conical nanopores using atomic layer deposition of Al2O3/ZnO nanolaminates and then coated these with trimethylsilane. The experimental results are supported by molecular dynamics simulations. The ionic transport reveals an unexpected behavior: (i) a current rectification and (ii) a constant conductance at low salt concentration which are usually reported for charged conical nanopore. To explain these results, we have considered different assumptions: (i) a default of functionalization, (ii) the adsorption anion and (iii) the slippage. The first one was refuted by the study of the poly-L-lysine transport through the nanopore. To verify the second assumption, we investigate the effect of pH on the current rectification and the molecular dynamics simulations. Finally our study demonstrates that the unexpected ionic transport is provided to a predominant effect of slippage due to the water organization at the solid/liquid interface.
中文翻译：
疏水和不带电荷的锥形纳米孔中的意外离子迁移行为
我们研究了在不带电的圆锥形纳米孔情况下的离子迁移行为。为此，我们使用原子层沉积Al 2 O 3 / ZnO纳米层压板设计了圆锥形纳米孔，然后用三甲基硅烷进行涂覆。实验结果得到分子动力学模拟的支持。离子迁移显示出出乎意料的行为：（i）电流整流和（ii）在低盐浓度下的恒定电导，通常报道为带电荷的圆锥形纳米孔。为了解释这些结果，我们考虑了不同的假设：（i）默认的官能化，（ii）吸附阴离子和（iii）滑移。第一个被poly- L的研究驳斥了-赖氨酸通过纳米孔的转运。为了验证第二个假设，我们研究了pH对电流精馏的影响以及分子动力学模拟。最后，我们的研究表明，由于固/液界面处的水组织，意外的离子迁移提供了主要的滑动效果。
更新日期：2018-10-10
中文翻译：
疏水和不带电荷的锥形纳米孔中的意外离子迁移行为
我们研究了在不带电的圆锥形纳米孔情况下的离子迁移行为。为此，我们使用原子层沉积Al 2 O 3 / ZnO纳米层压板设计了圆锥形纳米孔，然后用三甲基硅烷进行涂覆。实验结果得到分子动力学模拟的支持。离子迁移显示出出乎意料的行为：（i）电流整流和（ii）在低盐浓度下的恒定电导，通常报道为带电荷的圆锥形纳米孔。为了解释这些结果，我们考虑了不同的假设：（i）默认的官能化，（ii）吸附阴离子和（iii）滑移。第一个被poly- L的研究驳斥了-赖氨酸通过纳米孔的转运。为了验证第二个假设，我们研究了pH对电流精馏的影响以及分子动力学模拟。最后，我们的研究表明，由于固/液界面处的水组织，意外的离子迁移提供了主要的滑动效果。
京公网安备 11010802027423号