gas sensor – TechConnect Briefs

Evaluation of In2O3 prepared by the delayed ignition combustion process as a gas sensor

Lionti K., Fasoli A., Sundberg L., Ceccarelli F., Miller R.D., Bozano L., IBM Research - Almaden, US

Metal oxide semiconductor (MOS) gas sensors based on thin film technology offer the potential of higher sensitivity and faster response and recovery than their thick film counterparts. Solution-based approaches are facile and inexpensive routes to [...]

Nanocrystalline gold-based hydrogen sulfide (H2S) sensor from M13 bacteriophage template

Moon C.H., Zhang M., Yan Y., Myung N.V., Haberer E.D., University of California Riverside, US

Bio-templated assembly of inorganic materials is a promising technique for facile bottom-up assembly of complex and unique nanostructures at ambient conditions. Here, viral-templated nanocrystalline gold nanowires were synthesized for use in highly sensitive H2S sensors [...]

Local Synthesis of CuO Nanowires on CMOS Microhotplates for Gas Sensing Applications

Steinhauer S., Maier T., Mutinati G.C., Rohracher K., Siegert J., Schrank F., Koeck A., Materials Center Leoben Forschung GmbH, AT

CuO nanowires are locally synthesized on CMOS microhotplates leading to the realization of functional gas sensing devices. Only approximately 20mW are needed in order to heat the CMOS microhotplates to a temperature around 350°C, which [...]

ZnO nanorods decorated with Au nanoparticles applied as gas sensors

Gasparotto G., Mazon T., Gasparotto G., Silva R.A., Zaghete M.A., Perazolli L.A., Varela J.A., CTI, BR

Zinc oxide (ZnO) is a n-type semiconductor with energy band gap of 3:37 eV and a large binding energy of 60 meV at room temperature. ZnO nanostructures can be easily obtained with different morphologies by [...]

A sensing properties study on miniature Au/SnO2 gas sensor for hydrogen sulfide detection

Chang B-W, Ding S-J, Chen R.L.C., Hungkuang University, TW

The purpose of this study was to investigate the sensing properties for self-developed hydrogen sulfide gas sensor. In different temperature treatment and Au nano-particles doping ration, the sensitivity and selectivity of Au/SnO2 gas sensor were [...]

Gas sensor device based on a SnO2 nanowire network for increased sensing performances

Brunet E., Mutinati G.C., Steinhauer S., Koeck A., AIT Austrian Institute of Technology GmbH, AT

A novel gas sensor device based on a network of tin dioxide (SnO2) nanowires is presented. The high surface-to-volume ratio presented by the network of ultralong nanowires enables increased gas sensing performances in comparison to [...]

Au nanoelectrodes for breath analysis

Righettoni M., Tricoli A., Pratsinis S.E., ETH Zürich, CH

New medical diagnostic methods such as non-invasive human breath analysis bear the potential of drastically reducing medical costs as a greater amount of automatization is possible. SnO2 is one of the most utilized and best [...]

Nanostructured Stearic Acid for Gas sensing applications

Hullavarad N., Hullavarad S., Hullavarad N., Hullavarad S., University of Alaska Fairbanks, US

In this paper we report the fabrication of long chain polymer molecule Stearic Acid by physical vapor deposition method. Thin films of stearic acid are characterized by X-ray diffraction for the crystalline quality and by [...]

Irradiation effect on ethanol sensing response of zinc and tin composite oxide

Singh O., Singh R.C., Singh O., Singh R.C., Guru Nanak Dev University, IN

Sensing response of synthesized composite oxide of zinc and tin to ethanol vapor before and after irradiation has been reported in this paper. Composite oxide powder has been synthesized by a chemical route followed by [...]

Portable gas sensor for breath analysis

Righettoni M., Tricoli A., Gass S., Pratsinis S.E., ETH Zürich, CH

The detection of acetone in the human breath is a promising method for the noninvasive diagnosis and monitoring of diabetes. Here, a portable and highly selective acetone-sensor was developed by direct flame synthesis and deposition [...]