Water friction in nanofluidic channels made from two-dimensional crystals.
Water friction in nanofluidic channels made from two-dimensional crystals.
复制标题
由二维晶体制成的纳米流体通道中的水摩擦。
DOI：
10.1038/s41467-021-23325-3
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发表时间：
2021-05-25
影响因子：
16.6
通讯作者：
Radha B
中科院分区：
文献类型：
--
作者：
Keerthi A;Goutham S;You Y;Iamprasertkun P;Dryfe RAW;Geim AK;Radha B
渗透发电、海水淡化和分子分离等基于膜的应用将受益于纳米级通道中水摩擦的减少。然而，允许水流快速流动的机制还没有被完全理解。本文报道了由原子平面晶体制成的埃级毛细管，并研究了围壁材料对水摩擦的影响。由等结构石墨和六方氮化硼制成的通道之间存在巨大差异，这归因于固液界面上不同的静电和化学相互作用。通过精密的微重力测量和离子流测量，我们评估了滑移长度（水摩擦的一种测量方法），并研究了其与导电性、润湿性、表面电荷和围壁极性的可能联系。我们还表明，在相对壁上使用不同滑移长度的混合毛细管可以控制水摩擦。报道的进展扩展了纳米流体学的工具包，用于设计智能膜和模拟生物通道的多种机制。通过纳米尺度通道的流动促进了水面分子相互作用的公开研究。在这里，Keerthi等人用石墨和六方氮化硼制成的导管表明，强疏水性并不排除增强粘性和摩擦力。
Membrane-based applications such as osmotic power generation, desalination and molecular separation would benefit from decreasing water friction in nanoscale channels. However, mechanisms that allow fast water flows are not fully understood yet. Here we report angstrom-scale capillaries made from atomically flat crystals and study the effect of confining walls’ material on water friction. A massive difference is observed between channels made from isostructural graphite and hexagonal boron nitride, which is attributed to different electrostatic and chemical interactions at the solid-liquid interface. Using precision microgravimetry and ion streaming measurements, we evaluate the slip length, a measure of water friction, and investigate its possible links with electrical conductivity, wettability, surface charge and polarity of the confining walls. We also show that water friction can be controlled using hybrid capillaries with different slip lengths at opposing walls. The reported advances extend nanofluidics’ toolkit for designing smart membranes and mimicking manifold machinery of biological channels. Flow through nanometer scale channels facilitates an unmasked study of water-surface molecular interactions. Here, Keerthi et al. show with conduits made from graphite and hexagonal boron nitride that strong hydrophobicity does not rule out enhanced stickiness and friction.
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影响因子：
4.4
作者：
Itoh, Hidenosuke;Sakuma, Hiroshi
通讯作者：
Sakuma, Hiroshi
影响因子：
56.9
作者：
Holt, JK;Park, HG;Bakajin, O
通讯作者：
Bakajin, O
影响因子：
17.1
作者：
Neek-Amal, Mehdi;Peeters, Francois M.;Geim, Andre K.
通讯作者：
Geim, Andre K.
DOI：
10.1021/acs.jpclett.6b02248
发表时间：
2016-11-17
期刊：
The journal of physical chemistry letters
影响因子：
--
作者：
Grosjean B;Pean C;Siria A;Bocquet L;Vuilleumier R;Bocquet ML
通讯作者：
Bocquet ML
影响因子：
38.3
作者：
Dean, C. R.;Young, A. F.;Hone, J.
通讯作者：
Hone, J.