Ammonia detection by a novel Pyrex microsystem based on thermal creep phenomenon
| Autor: | V. Martini-Laithier, Marc Bendahan, Sandrine Bernardini, Pierre Perrier, Irina Graur, Khalifa Aguir |
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| Přispěvatelé: | Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut universitaire des systèmes thermiques industriels (IUSTI), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU) |
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Microchannel business.industry Microfluidics Flow (psychology) Metals and Alloys Analytical chemistry chemistry.chemical_element Tungsten Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials [SPI]Engineering Sciences [physics] Temperature gradient chemistry Microsystem Thermal Materials Chemistry Mass flow rate Optoelectronics Electrical and Electronic Engineering business Instrumentation |
| Zdroj: | Sensors and Actuators B: Chemical Sensors and Actuators B: Chemical, 2014, ⟨10.1016/j.snb.2013.10.120⟩ Sensors and Actuators B: Chemical, Elsevier, 2014, ⟨10.1016/j.snb.2013.10.120⟩ |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2013.10.120 |
| Popis: | Our 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 (WO 3) 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 gradient along 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 complete Pyrex microsystem has been realized to detect ammonia. The existence of the thermal pumping has been demonstrated experimentally. |
| Databáze: | OpenAIRE |
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