Hierarchical highly ordered SnO_(2) nanobowl branched ZnO nanowires for ultrasensitive and selective hydrogen sulfide gas sensing
Hierarchical highly ordered SnO2 nanobowl branched ZnO nanowires for ultrasensitive and selective hydrogen sulfide gas sensing作者机构：State Key Laboratory of ASIC and SystemShanghai Institute of Intelligent Electronics&SystemsSchool of MicroelectronicsFudan University200433 ShanghaiChina Inorganic Materials ChemistryRuhr-University Bochum44780 BochumGermany
出 版 物：《Microsystems & Nanoengineering》 (微系统与纳米工程（英文）)
年 卷 期：2020年第6卷第1期
页 面：1016-1028页
核心收录：
学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
基 金：This work was supported by the National Natural Science Foundation of China(No.U1632121,51861135105,and 61874034) Basic Research Project of Shanghai Science and Technology Innovation Action(No.17JC1400300) Natural Science Foundation of Shanghai(No.18ZR1405000) China Postdoctoral Science Foundation(No.TQ20190067)
摘 要：Highly sensitive and selective hydrogen sulfide(H_(2)S)sensors based on hierarchical highly ordered SnO_(2) nanobowl branched ZnO nanowires(NWs)were synthesized via a sequential process combining hard template processing,atomic-layer deposition,and hydrothermal *** hierarchical sensing materials were prepared in situ on microelectromechanical systems,which are expected to achieve high-performance gas sensors with superior sensitivity,long-term stability and repeatability,as well as low power ***,the hierarchical nanobowl SnO_(2)@ZnO NW sensor displayed a high sensitivity of 6.24,a fast response and recovery speed(i.e.,14 s and 39 s,respectively),and an excellent selectivity when detecting 1 ppm H_(2)S at 250°C,whose rate of resistance change(i.e.,5.24)is 2.6 times higher than that of the pristine SnO_(2) nanobowl *** improved sensing performance could be attributed to the increased specific surface area,the formation of heterojunctions and homojunctions,as well as the additional reaction between ZnO and H_(2)S,which were confirmed by electrochemical characterization and band alignment ***,the well-structured hierarchical sensors maintained stable performance after a month,suggesting excellent stability and *** summary,such well-designed hierarchical highly ordered nanobowl SnO_(2)@ZnO NW gas sensors demonstrate favorable potential for enhanced sensitive and selective H_(2)S detection with long-term stability and repeatability.
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