通过同位素标记测量超快液态水在基于石墨烯的纳米通道中的传输。

Ultrafast liquid water transport through graphene-based nanochannels measured by isotope labelling.

作者信息

Sun Pengzhan, Liu He, Wang Kunlin, Zhong Minlin, Wu Dehai, Zhu Hongwei

机构信息

School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China.

出版信息

Chem Commun (Camb). 2015 Feb 21;51(15):3251-4. doi: 10.1039/c4cc10103k.

DOI:10.1039/c4cc10103k

PMID:25608844

Abstract

Based on isotope labelling, we found that liquid water can afford an ultrafast permeation through graphene-based nanochannels with a diffusion coefficient 4-5 orders of magnitude greater than in the bulk case. When dissolving ions in sources, the diffusion coefficient of ions through graphene channels lies in the same order of magnitude as water, while the ion diffusion is slightly faster than water, indicating that the ions are mainly transported by water flows and the delicate interactions between ions and nanocapillary walls also take effect in the accelerated ion transportation.

摘要

基于同位素标记，我们发现液态水能够以超快的速度透过基于石墨烯的纳米通道，其扩散系数比在本体情况下大4 - 5个数量级。当在源中溶解离子时，离子通过石墨烯通道的扩散系数与水处于同一数量级，而离子扩散比水稍快，这表明离子主要由水流输送，并且离子与纳米毛细管管壁之间的微妙相互作用也对加速离子传输起到作用。