Aqueous Stable Ti3C2 MXene Membrane with Fast and Photoswitchable Nanofluidic Transport
Aqueous Stable Ti3C2 MXene Membrane with Fast and Photoswitchable Nanofluidic Transport
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具有快速、光切换纳流体传输的水相稳定 Ti3C2 MXene 膜
DOI：
10.1021/acsnano.8b06708
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发表时间：
2018-12-01
期刊：
影响因子：
17.1
通讯作者：
Luo, Jiayan
中科院分区：
文献类型：
--
作者：
Lao, Junchao;Lv, Ruijing;Luo, Jiayan
高、稳定和可调节的离子电导率对于多层二维（2D）膜的许多纳米流体应用是重要的。在这项研究中，我们证明了Ti3C2Tx膜的质子和离子电导率在低浓度下比体溶液高几个数量级。重要的是，由于层间的范德瓦尔斯相互作用和弱的静电排斥相互作用，该膜在水溶液中具有高度的稳定性而不需要任何修饰。此外，通过利用MXene的固有光热特性，我们证明了离子电导率可以被激光反向、快速和完全地打开或关闭。本研究将证明MXene膜是研究和利用纳米流体离子传输的合适平台。它也应该启发未来的研究，利用其固有的物理化学性质来操纵通过二维膜的质量传输。
High, stable, and modulatable ionic conductivity is important for many nanofluidic applications of layered two-dimensional (2D) membranes. In this study, we demonstrate a proton and ionic conductivity of the Ti3C2Tx membrane that is orders of magnitude higher than that of bulk solution at low concentrations. Importantly, the membrane is highly stable in aqueous solution without any modification, due to the strong and attractive interlayer van der Waals interaction and weak electrostatic repulsive interaction. Furthermore, by exploiting the intrinsic photothermal property of MXene, we demonstrate that the ionic conductivity can be reversely, rapidly, and completely switched on or off with laser light. This study should prove MXene membrane as a suitable platform to study and utilize nanofluidic ion transport. It should also inspire future studies to manipulate the mass transport through 2D membranes using their inherent physicochemical properties.