Luo Xinyu, Zhang Ming, Hu Yubin, Xu Yan, Zhou Haofei, Xu Zijian, Hao Yinxuan, Chen Sheng, Chen Shengfu, Luo Yingwu, Lin Yiliang, Zhao Junjie
State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China.
Institute of Zhejiang University-Quzhou, Quzhou, Zhejiang 324000, China.
Science. 2024 Aug 9;385(6709):647-651. doi: 10.1126/science.adn8168. Epub 2024 Aug 8.
Flexible integration spurs diverse applications in metal-organic frameworks (MOFs). However, current configurations suffer from the trade-off between MOF loadings and mechanical compliance. We report a wrinkled configuration of MOF thin films. We established an interfacial synthesis confined and controlled by a polymer topcoat and achieved multiple Turing motifs in the wrinkled thin films. These films have complete MOF surface coverage and exhibit strain tolerance up to 53.2%. The enhanced mechanical properties allow film transfer onto various substrates. We obtained membranes with large H/CO selectivity (41.2) and high H permeance (8.46 × 10 gas permeation units), showcasing negligible defects after transfer. We also achieved soft humidity sensors on delicate electrodes by avoiding exposure to harsh MOF synthesis conditions. These results highlight the potential of wrinkled MOF thin films for plug-and-play integration.
灵活集成促进了金属有机框架（MOF）的多样化应用。然而，目前的配置在MOF负载量和机械柔韧性之间存在权衡。我们报道了一种MOF薄膜的褶皱结构。我们建立了一种由聚合物顶涂层限制和控制的界面合成方法，并在褶皱薄膜中实现了多种图灵图案。这些薄膜具有完整的MOF表面覆盖率，并且表现出高达53.2%的应变耐受性。增强的机械性能使薄膜能够转移到各种基材上。我们获得了具有高H/CO选择性（41.2）和高H渗透率（8.46×10气体渗透单位）的膜，转移后显示出可忽略不计的缺陷。我们还通过避免暴露于苛刻的MOF合成条件，在精致的电极上实现了柔软的湿度传感器。这些结果突出了褶皱MOF薄膜在即插即用集成方面的潜力。
