gas sensor – Page 2 – TechConnect Briefs

Carbon nanotubes transistors based Selective Gas sensors : from laboratory to mass production

Gorintin L., Thales Research and Technology, FR

Gas sensing Property of Carbon NanoTube (CNT) transistors are known for several years to be extremely sensitive to gases and thus have been proposed as gas sensors for several applications. But their versatility and their [...]

Innovative Gas Sensors for Sub-ppm Detection of Organophosphorus Nerve Agents by Chemically Functionalized Carbon Nanotube Field-Effect Transistors

Carella A., Caillier L., Clavaguera S., Celle C., Simonato J-P, CEA, FR

In this communication, we will present innovative sensors based on carbon nanotube field-effect transistors (CNT-FET) for detection of organophosphorus agents (OP, Sarin-like molecules). We have functionalized CNT with organic moieties reactive towards OPs that form [...]

Novel Nanostructures for Solid State Alcohol Breath Analyzers

Tricoli A., Righettoni M., Pratsinis S.E., Swiss Federal Institute of Technology, CH

Solid state alcohol breath analyzers are commonly used by the law enforcement authorities, due to high sensitivity toward ethanol, their portability and fair response and recovery times. Common materials for the synthesis of the sensitive [...]

Micromechanical GaAs Thermal Convertor for Gas Sensors

Jakovenko J., Lalinsky T., Drzík M., Vanko G., Czech Technical University in Prague, Faculty of Electrical Engineering, CZ

This paper discusses design, simulation and fabrication of new Micromechanical Thermal Converters (MTCs) based on GaAs developed for Gas sensors. GaAs MTCs seem to be very attractive for design of thermally based MEMS sensor devices. [...]

Spray Pyrolysis Technology for Nanodimensional Film Gas Sensors Manufacturing

Dmitriev S., Goglidze T., Dementiev I., Moldova State University, MD

Report presents results of investigations aimed spray pyrolysis technology application for nano-dimensional film gas sensors (NDFGS) manufacturing. It is shown that due to spray deposition installation modification the developed technology of nanodimensional gas sensitive film [...]

Polypyrrole-Organoclay Nanocomposites for Gas Sensors

Magaraphan R., Thuimthad A., Chulalongkorn University, TH

Polypyrrole (PPy) was synthesized in the presence of octadecylammonium-montmorillonite (OC-MMT) 1-9 wt% using ferric chloride as an initiator to result the intercalated nanocomposites. The synthesized PPy and its nanocomposites were tested for volatile organic gases; [...]

Micro Patterning Sensor Layers by Flame Deposition and Annealing

Tricoli A., Graf M., Mayer F., Kühne S., Hierlemann A., Pratsinis S.E., Swiss Federal Institute of Technology (ETH Zürich ), CH

A wafer-level, CMOS-compatible, dry process for in-situ synthesis, deposition and annealing of nanostructured, porous metal-oxide layers for gas sensors is presented. First, lace-like, nanostructured layers of pure or Pt-doped SnO2 featuring high porosity (98%) are [...]

Low Temperature Volatile-Organic-Compound (VOC) Sensor Based on Tungsten Oxide Nanorods

Kim Y-S, Kim Y.T., Kim Y-S, Kim Y.T., Lee K., Electronics and Telecommunications Research Institute (ETRI), KR

Tungsten oxide sensors were fabricated by using highly crystalline and homogeneous WO2.72 nanorods, previously synthesized and characterized with average 75-nm length and 4-nm diameter [1]. They provide unique opportunities for investigating the effects of size-controlled [...]

Flame Made Nanoparticles for Gas Sensors

Mädler L., Pratsinis S.E., Sahm T., Gurlo A., Barsan N., Weimar U., University of California, Los Angeles, CH

Flame aerosol technology is one of the most widely used synthesis routes in manufacturing of commercial quantities of nanoparticles. The application of flame spray pyrolysis further broadens the spectrum of flame made powders and their [...]

Electro-Thermal Modeling: Design Tool for the Conception of a Low Power SnO2 Gas Sensor

Astié S., Gué A.M., Scheid E., Guillemet J.P., LAAS/CNRS, FR

The sensor's operating principle consists in measuring the resistance variations of a thin semiconductive layer heated between 250 and 450?C as a function of the nature and quantity of the molecules adsorbed on its surface. [...]