title: Temperature-programmed technique accompanied with high-throughput methodology for rapidly searching the optimal operating temperature of MOX gas sensors.
abstract: A combinatorial high-throughput temperature-programmed method to obtain the optimal operating temperature (OOT) of gas sensor materials is demonstrated here for the first time. A material library consisting of SnO2, ZnO, WO3, and In2O3 sensor films was fabricated by screen printing. Temperature-dependent conductivity curves were obtained by scanning this gas sensor library from 300 to 700 K in different atmospheres (dry air, formaldehyde, carbon monoxide, nitrogen dioxide, toluene and ammonia), giving the OOT of each sensor formulation as a function of the carrier and analyte gases. A comparative study of the temperature-programmed method and a conventional method showed good agreement in measured OOT.
authors.affiliation: State Key Laboratory of Materials Processing and Die & Mould Technology, Nanomaterials and Smart Sensors Research Laboratory (NSSRL), Department of Materials Science and Engineering, Huazhong University of Science and Technology , Wuhan 430074, PR China.
authors.forename: Guozhu
authors.initials: G
authors.lastname: Zhang
authors.forename: Changsheng
authors.initials: C
authors.lastname: Xie
authors.forename: Shunping
authors.initials: S
authors.lastname: Zhang
authors.forename: Jianwei
authors.initials: J
authors.lastname: Zhao
authors.forename: Tao
authors.initials: T
authors.lastname: Lei
authors.forename: Dawen
authors.initials: D
authors.lastname: Zeng
mesh_terms: D000641:Ammonia / Q000032:analysis; D001272:Atmosphere / Q000032:analysis* / Q000737:chemistry*; D002248:Carbon Monoxide / Q000032:analysis; D005557:Formaldehyde / Q000032:analysis; D005740:Gases / Q000032:analysis*; D057166:High-Throughput Screening Assays; D007204:Indium / Q000737:chemistry; D009585:Nitrogen Dioxide / Q000032:analysis; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties; D013696:Temperature; D014001:Tin / Q000737:chemistry; D014050:Toluene / Q000032:analysis; D014414:Tungsten / Q000737:chemistry; D015032:Zinc / Q000737:chemistry
chemical_list: D005740:Gases; D010087:Oxides; D007204:Indium; D005557:Formaldehyde; D014050:Toluene; D014001:Tin; D000641:Ammonia; D002248:Carbon Monoxide; D015032:Zinc; D009585:Nitrogen Dioxide; D014414:Tungsten
keywords: arrays; gas sensor; high-throughput screening; isothermal technique; oxide materials; temperature-dependent conductivity