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 ...

A composite metal oxide semiconductor (MOS) sensor array based on tin dioxide (SNO2) and zinc oxide (ZnO) has been fabricated using a straight forward mechanical mixing method. The array was characterized using X-ray photoelectron spectroscopy, scanning electron microscopy, Raman spectroscopy and X-ray diffraction. The array was evaluated against a number of environmentally important reducing a...

SnO2 is widely used for ethanol-sensing applications due to its excellent physicochemical properties, low toxicity and high sensitivity. However it a challenge construct 3D-hierarchical structures with sub 5 nm primary grain particle, which the optimized size ethanol sensor. Herein, genetic tri-level hierarchical microstructures are synthesised by conversion of 3D SnS2 flowers assembled ultrath...

The gas sensitivity of semiconductor metal oxides, such as γ-Fe2O3 and SnO2, is investigated together with the synergistic effects in conjunction grapheme. Nanoparticles γ-Fe2O3, γ-Fe2O3/SnO2, γ-Fe2O3/SnO2/RGO, prepared by two-step fabrication, were assembled gas-sensing devices to assess their sensitivities; response recovery times for detection ethanol, methanol, isopropanol, formaldehyde, H2...

We report the development of different types of oxygen sensors based on yittria-stabilized zirconia (YSZ) as a solid electrolyte. The conventional oxygen sensor is a concentration cell with two porous Pt electrodes, one of which is exposed to air as a constant (reference) oxygen concentration and the other is exposed to automobile exhaust gas of variable oxygen concentration, depending on the a...

A micro-fabricated metal-oxide based conductometric pH sensor is designed and fabricated in this manuscript. pH sensors have applications in various areas from farming to food processing, human health monitoring, industrial waste products investigation, etc. Accordingly, there is a relatively high demand for a reliable, rapid and precise pH sensor in the market. Relatively precise pH sensors ha...

SnO2 nanowires are locally synthesized by a simple thermal evaporation method and its growth mechanism is confirmed. Here, we present strategy for realizing reduced graphene oxide (RGO)/SnO2 heterostructure. As expected, the heterostructure gas-sensing response up to 63.3 when gas concentration of trimethylamine (TEA) 50 ppm, it exhibits an excellent dynamic with high stability at 180 °C. A low...

This paper describes the morphology, stoichiometry, microstructure and gas sensing properties of nano clustered SnOx thin films prepared by Sn evaporation followed by the Rheotaxial Growth and Thermal Oxidation (RGTO) process. Electron microscopy was used to investigate, in detail, the evolution of the films as the oxidation temperature was increased. The results showed that the contact angle, ...

In this paper, we report on the optimization of SnO2-based thin film gas sensor devices by mono-, bi- and trimetallic nanoparticles. Ag, AgRu, AgRuPd nanoparticles are sputter deposited CMOS-integrated SnO2-thin devices. The CMOS device is a worldwide unique chip containing an array eight microhotplates. response towards target CO was dramatically increased from 10% to more than 70% using

Mesoporous SnO2 with a high surface area of 292.7 m(2) g(-1) has been successfully synthesized via a low-cost NH4Cl-based ionothermal route. When evaluated as a gas sensor, impressive performances towards N2H4 and HCHO are achieved owing to its excellent chemical reactivity towards oxygen.