文献类型：期刊文献

英文题名：A flexible and ion-conductive hydrogel as an artificial nose for odorous H2S detection

作者：Deng, Weijun[1];Wang, Mengke[1];Hu, Jing[2];Wen, Huitao[3]

机构：[1]Shanghai Inst Technol, Fac Chem Engn & Energy Technol, Shanghai 201418, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[3]Fujian Key Lab Leather Green Design & Manufacture, Jinjiang 362271, Fujian, Peoples R China

年份：2025

卷号：13

期号：36

起止页码：18734

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY C

收录：;EI(收录号：20253819206907);WOS:【SCI-EXPANDED(收录号:WOS:001551065400001)】；

基金：This work is supported by the National Natural Science Foundation of China (22278268 and 22478246), and Fund of Fujian Provincial Key Laboratory of Leather Green Design and Manufacture (2023XYL05).

语种：英文

外文关键词：Biomimetics - Diagnosis - Electronic nose - Odor control - Quality control - Robotics

摘要：Discriminative and sensitive detection of low-concentration odorous gases is of great significance for health diagnostics, product quality control and robotics. However, achieving a biomimetic olfactory system in these applications with a hydrogel remains a challenge. Here, by learning the mechanism of human olfactory epithelium, we design a flexible and ion-conductive hydrogel based on cellulose as an artificial nose. The hydrogel is soft, flexible, adhesive, self-healing and conductive, enabling the integration with various devices. The artificial nose exhibits high selectivity to H2S over other gas molecules such as NH3, NO2, CO2, CH3CH2OH, CH2O, etc. It has high linear sensitivity (0.34 ppm-1) with a fast response (143 s). More importantly, the sensing range of this artificial nose extends into the human olfactory threshold for H2S. The sensor is operated under low voltage (1 V) and mild temperature (0-25 degrees C) with sensing stability for at least 2 weeks. Furthermore, this artificial nose is demonstrated to be promising for applications in noninvasive halitosis diagnosis and meat spoilage identification. Our work may inspire odorant sensor development with an artificial olfactory system for robotics and other specific applications.