Intelligent Multifunctional Sensing Systems based on Ordered Macro‐Microporous Metal Organic Framework and Its Derivatives

Abstract Compared with nanomaterials‐based sensors with single function, the development of multifunctional sensors shows high potential in comprehensive monitoring of personal health and environment, intelligent human‐machine interfaces, and realistic imitation of human skin in prosthetics. Ordered macro‐microporous metal‐organic frameworks (MOFs)‐enabled flexible and stretchable electronics are promising candidates for integrated multifunctional sensing systems. Herein, a three‐dimensional ordered macro‐microporous zeolite imidazolate framework‐8 (3DOM ZIF‐8) for humidity sensing and the derived ZnO within a hierarchically ordered macroporous‐mesoporous‐microporous carbon matrix (ZnO@HOMC) for gas sensor is constructed. Benefit from hierarchically ordered macroporous‐mesoporous‐microporous structure, the active site is fully exposed, and the charge transfer is accelerated. As a result, the multifunctional sensing systems show ultrafast response and recovery speed (10 s and 34 s), high sensitivity ( R air /R gas = 38.6@50 ppm) to acetone, rapid humidity response speed (0.23 s) within changing humidity (RH 21%–99%), excellent stability and repeatability. Furthermore, in order to realize real‐time monitoring of gas concentrations and humidity on mobile devices, an intelligent and portable sensor module is fabricated and wirelessly connected to a smartphone to effectively detect acetone concentration and humidity. This sensing technology shows fascinating applications in personal health, fitness tracking, electronic skins, artificial nervous systems, and human‐machine interactions.