CALLE LA MARINA Y ALAMEDA [Material gráfico]

FOTO POSTAL DE CALLE DE LA MARINA TENERIFE. DUPLICADO DE LA IMÁGENES Nº 2178 Y 2180Copia digital. Madrid : Ministerio de Educación, Cultura y Deporte. Subdirección General de Coordinación Bibliotecaria, 201

Simulation of an Innovant and Low Power Heater of a Gas Sensing Device

International audienc

Simulation of an Innovant and Low Power Heater of a Gas Sensing Device

International audienc

Conception de multicapteurs pour la mesure d’éthanol par perspiration cutanée

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Integrated multi-sensors for ethanol measurement on the skin by perspiration

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Thin film SnO2 sensor for low level formaldehyde detection

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Flexible ozone sensor fabricated by photolithography and laser patterning

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Thin film SnO2 sensor for low level formaldehyde detection

International audienc

Ammonia detection by a novel Pyrex microsystem based on thermal creep phenomenon

International audienceOur research work aims to develop a microfluidic system for gas analysis by using an original principle of integrated pumping. This microsystem can detect ammonia and the gas flow parameters inside the channel can be also controlled. The proposed microdevice consists in a microchannel including an integrated gas sensor with a heater. The trioxide tungsten (WO3) is implemented as a sensitive layer. The integrated heater is used for two reasons: to optimize the sensor response and to induce the gas pumping inside the microchannel by thermal creep phenomenon, therefore, no external pumping system is required. The study of the pumping effect generation has been realized by thermal and microfluidic simulations. Thermal simulations have been performed to estimate the thermal gradientalong the microchannel. In addition, the microfluidic modelling allows us to determine the mass flow rate for different thermal gradient profiles, obtained from the thermal simulations. Finally, a completePyrex microsystem has been realized to detect ammonia. The existence of the thermal pumping has been demonstrated experimentally