Oriented Two-Dimensional Covalent Organic Framework Membranes with High Ion Flux and Smart Gating Nanofluidic Transport

被引：56

作者：

Cao, Li ^{[1
]}

Liu, Xiaowei ^{[1
]}

Shinde, Digambar B. ^{[1
]}

Chen, Cailing ^{[1
]}

Chen, I-Chun ^{[1
]}

Li, Zhen ^{[1
]}

Zhou, Zongyao ^{[1
]}

Yang, Zhongyu ^{[2
]}

Han, Yu ^{[1
]}

Lai, Zhiping ^{[1
]}

机构：

[1] King Abdullah Univ Sci & Technol KAUST, Div Phys Sci & Engn, Thuwal 239556900, Saudi Arabia

[2] North Dakota State Univ, Dept Chem & Biochem, Fargo, ND 58102 USA

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2022年 / 61卷 / 06期

关键词：

high-ion flux; ion gating; nanofluidic transport; oriented COF membranes; 2D; TRANSLOCATION; DNA; CHANNELS; FILMS;

D O I：

10.1002/anie.202113141

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Nanofluidic ion transport holds high promise in bio-sensing and energy conversion applications. However, smart nanofluidic devices with high ion flux and modulable ion transport capabilities remain to be realised. Herein, we demonstrate smart nanofluidic devices based on oriented two-dimensional covalent organic framework (2D COF) membranes with vertically aligned nanochannel arrays that achieved a 2-3 orders of magnitude higher ion flux compared with that of conventional single-channel nanofluidic devices. The surface-charge-governed ion conductance is dominant for electrolyte concentration up to 0.01 M. Moreover, owing to the customisable pH-responsivity of imine and phenol hydroxyl groups, the COF-DT membranes attained an actively modulable ion transport with a high pH-gating on/off ratio of approximate to 100. The customisable structure and rich chemistry of COF materials will offer a promising platform for manufacturing nanofluidic devices with modifiable ion/molecular transport features.

引用

页数：8