Strategies to enhance the carbon monoxide sensitivity of tin oxide thin films

Mandayo, G.G.; Castaño, E.; Gracia, F.J.; Cirera, A.; Cornet, A.; Morante, J.R.

doi:10.1016/s0925-4005(03)00413-1

Cited by 88 publications

(35 citation statements)

References 12 publications

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“…The final prototype will contain 3 different conductometric sensors. In this context, fabrication methods for SnO 2 [12,13], and NiO [14,15] thin films were previously developed as well as methods for SnO 2 nanowire fabrication [16]. It is commonly agreed that onedimensional nanostructures of those metal oxides, such as nanowires and nanorods, usually constitute improved sensing structures because sensitivity and velocity of response are closely related to the surface activity of the material.…”

Section: System Description and Experimentalmentioning

confidence: 99%

System to control indoor air quality in energy efficient buildings

et al. 2015

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This work aims at monitoring air quality in indoor environments through the integration of several sensing technologies into a single robust, reliable and cheap detection platform, which shares air pre-conditioning and electronics. Target gases and detection limits have been set according to recommendations of different agencies in Europe and the US. The system has reached detection limits stated by the OSHA (Occupational Safety and Health Administration) for benzene. The pre-conditioning fluidic platform has also been designed, simulated, fabricated and tested with sensors so the gas flow has been optimized. Field tests in real buildings are being carried out to contrast current measurement procedures and results with the obtained using the device under development. The main aim of the system is to control HVAC (Heat Ventilation and Air Conditioning) in energy-efficient way while keeping a high air quality standard inside the building. HighlightsA system to control indoor air quality is being designed, fabricated and tested. Conductometric sensors based on nanostructured ZnO are developed for the system. A fluidic unit is being developed to improve the performance of the sensors. Field studies in buildings are carried out to be contrasted with the developed system.

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Section: System Description and Experimentalmentioning

confidence: 99%

System to control indoor air quality in energy efficient buildings

et al. 2015

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“…R.f. sputtering [74], dc-magnetron sputtering [75], thermal evaporation [76,77], ion beam deposition [78], spray pyrolysis [79], and Sol-gel [80] are the most studied methods for the preparation of SnO 2 . Sberveglieri [81] presented a review of the techniques applied for SnO 2 films deposition and it was shown that most of the methods require high-temperature treatments in order to fabricate good-quality polycrystalline films.…”

Section: Nanocrystalline Metal Oxide-based Methane Sensorsmentioning

confidence: 99%

Nanocrystalline Metal Oxides for Methane Sensors: Role of Noble Metals

Basu

2009

Journal of Sensors

130

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Methane is an important gas for domestic and industrial applications and its source is mainly coalmines. Since methane is extremely inflammable in the coalmine atmosphere, it is essential to develop a reliable and relatively inexpensive chemical gas sensor to detect this inflammable gas below its explosion amount in air. The metal oxides have been proved to be potential materials for the development of commercial gas sensors. The functional properties of the metal oxide-based gas sensors can be improved not only by tailoring the crystal size of metal oxides but also by incorporating the noble metal catalyst on nanocrystalline metal oxide matrix. It was observed that the surface modification of nanocrystalline metal oxide thin films by noble metal sensitizers and the use of a noble metal catalytic contact as electrode reduce the operating temperatures appreciably and improve the sensing properties. This review article concentrates on the nanocrystalline metal oxide methane sensors and the role of noble metals on the sensing properties.

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“…Tin oxide based semiconductor gas sensors have been widely used for detection of the environmentally hazardous pollutant gases in general and carbon monoxide gas in particular [1][2][3][4][5][6]. However their detecting mechanism is not fully yet established.…”

Section: Introductionmentioning

confidence: 99%

“…However their detecting mechanism is not fully yet established. Film parameters that are widely known to affect the sensing properties of a thin film are surface roughness, stoichiometry, grain size, structure (amorphous or polycrystalline), and porosity [1][2][3][4][5][6]. Furthermore depending on the preparation conditions of the sensing layers (physical vapor deposition, chemical vapor deposition, screen-printed and sintered materials) and also on the sensor design (nature and geometry of the electrodes), large differences of behavior concerning gas response and selectivity are observed [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Biasing Voltage Dependence of Sensitivity of Electron Beam Evaporated SnO2 Thin Film CO Sensor

Durrani

2006

Sensors

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Thin films of tin oxide were deposited by electron beam evaporation. The effects of the sensor biasing voltage and film thickness on the CO-sensing of tin oxide thin films were investigated. The films were characterized using X-ray diffraction and X-ray photoelectron spectroscopy All the films were found to be amorphous. The current-voltage characteristic of the sensor in air has shown that semiconductor-metal interface forms Schottky barrier. It was found that the CO-sensing properties depend on the sensor biasing voltage and film thickness. For lower biasing voltages the sensitivity was much higher than for the higher voltages. It was found that the sensitivity of the films to CO increased with the film thickness.

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Strategies to enhance the carbon monoxide sensitivity of tin oxide thin films

Cited by 88 publications

References 12 publications

System to control indoor air quality in energy efficient buildings

System to control indoor air quality in energy efficient buildings

Nanocrystalline Metal Oxides for Methane Sensors: Role of Noble Metals

Biasing Voltage Dependence of Sensitivity of Electron Beam Evaporated SnO2 Thin Film CO Sensor

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