Aqueous Stable Ti3C2 MXene Membrane with Fast and Photoswitchable Nanofluidic Transport,ACS Nano

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Aqueous Stable Ti3C2 MXene Membrane with Fast and Photoswitchable Nanofluidic Transport
ACS Nano ( IF 15.8 ) Pub Date : 2018-11-29 00:00:00 , DOI: 10.1021/acsnano.8b06708
Junchao Lao ₁ , Ruijing Lv ₁ , Jun Gao ₂ , Aoxuan Wang ₁ , Jinsong Wu ₃ , Jiayan Luo _{1,

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Affiliation

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 Ti₃C₂T_x 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.

中文翻译：

具有快速且可光开关的纳米流体传输的稳定的Ti ₃ C ₂ MXene水性膜。

高，稳定和可调节的离子电导率对于层状二维（2D）膜的许多纳米流体应用非常重要。在这项研究中，我们证明了Ti ₃ C ₂ T _x的质子和离子电导率膜比低浓度时的本体溶液高几个数量级。重要的是，由于强而有吸引力的层间范德华相互作用和弱静电排斥相互作用，该膜在水溶液中高度稳定而没有任何修饰。此外，通过利用MXene的固有光热特性，我们证明了离子导电性可以通过激光反向，快速和完全打开或关闭。这项研究应证明MXene膜是研究和利用纳米流体离子传输的合适平台。它还应激发未来的研究，以利用其固有的物理化学特性来控制通过2D膜的传质。

更新日期：2018-11-29

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