title: A novel electronic nose based on porous In2O3 microtubes sensor array for the discrimination of VOCs.
abstract: We have innovatively developed an electronic nose consisting of only one type of semiconductor metal oxide (SMO) material. The representative SMO material, porous In2O3 microtubes in this work, offered great surface area and large gas penetration channels. By using a solvent casting process, different amounts of porous In2O3 microtubes were coated on Al2O3 substrate, forming a resistometric SMO sensor array-based electronic nose. Each sensing unit in the electronic nose exhibited independent response toward ethanol. We have successfully applied this electronic nose to distinguish four alcohols at the same concentrations (100 ppm), and also utilized the electronic nose for the discrimination of 14 volatile organic compounds (VOCs). Clear differentiation among all the 14 VOCs both at their immediately dangerous to life or health (IDLH) and the permissible exposure limit (PEL) concentrations has been achieved with no errors or misclassifications. We expect that this method will expand the application of SMO sensor array-based electronic nose which has been largely limited by the selection of commercially available SMOs and dopants.
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, PR China; College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, PR China.
authors.forename: Wei
authors.initials: W
authors.lastname: Yang
authors.affiliation: Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian, Liaoning 116024, PR China.
authors.forename: Peng
authors.initials: P
authors.lastname: Wan
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, PR China.
authors.forename: Mingyan
authors.initials: M
authors.lastname: Jia
authors.affiliation: College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, PR China.
authors.forename: Jiming
authors.initials: J
authors.lastname: Hu
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, PR China.
authors.forename: Yafeng
authors.initials: Y
authors.lastname: Guan
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, PR China. Electronic address: fengl@dicp.ac.cn.
authors.forename: Liang
authors.initials: L
authors.lastname: Feng
mesh_terms: D032701:Biomimetics / Q000295:instrumentation*; D003217:Conductometry / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D007204:Indium / Q000737:chemistry*; D009666:Nose; D012666:Semiconductors; D012903:Smell; D014159:Transducers; D055549:Volatile Organic Compounds / Q000032:analysis* / Q000737:chemistry
chemical_list: D055549:Volatile Organic Compounds; D007204:Indium; C047711:indium oxide
keywords: Electronic nose; In(2)O(3); Microtubes; Sensor array; Volatile organic compound