Obiettivo Semiconductor gas sensors have been the subject of extensive research and development with a view to their use as toxic and inflammable gas sensor devices. However, their lack of reproducibility and selectivity necessitates improvements in the elaboration and characterisation of semiconductor materials. The aim of this project is the study of semiconductor materials, mainly SnO2-based (thin films ceramics and single crystals), in order to develop material synthesis methods for low-cost systems of gas detection in the environment. To achieve this goal, specific research tasks include: pure and doped SnO2 elaboration; CVD, Pyrosol process, laser ablation and magnetron sputtering (thin films); aerosol pyrolysis and precipitation in solution (ceramics and thick films); chemical vapour transport reactions (single crystal); pure SnO2 sample characterisations in regard to bulk and surface area composition, microstructure and electrical properties; doping effect investigation; thermodynamic analysis of SnO2-M and SNO2-MOx systems; real microstructure observation; dopants diffusion study and transport properties measurements; study of solid SnO2 gas reactions; Auger and IR spectroscopy for surface area composition analysis; mass spectroscopy for desorption investigation; DC conductance and complex impedance techniques for the electrical tests; assembly of the basic experimental and published results (SnO2 databank formation) with analysis of relationship between composition, structure and electrical properties of materials prepared by different methods; development and optimisation of elaboration processes for gas sensor applications; realisation of thin films and ceramics gas sensor prototype. The expected results will include: in fundamental studies the combination of single crystal, ceramic and thin film analysis of relationships between composition, structure and electrical properties of materials obtained via different methods will improve knowledge of the complex gas-sensing mechanisms; the elaboration of processes of the sensitive material for gas sensor applications; the development and optimisation of each of the several elaboration processes will allow an optimisation of the material for each of the several gas detection applications. It may be possible to propose a gas detection domain via each elaboration process. The realisation and the study of test structures, i.e. laboratory prototypes, will make it possible to define further development of these sensors with the objectives of low-cost and easy fabrication. Programma(i) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Argomento(i) 58 - Environmental Monitoring and Modelling Invito a presentare proposte Data not available Meccanismo di finanziamento Data not available Coordinatore Institut National Polytechnique de Grenoble Contributo UE Nessun dato Indirizzo 38042 St. Martin d'Hères Francia Mostra sulla mappa Costo totale Nessun dato Partecipanti (4) Classifica in ordine alfabetico Classifica per Contributo UE Espandi tutto Riduci tutto Institut für Festkörper und Werkstofforschung e.V. Germania Contributo UE Nessun dato Indirizzo 01171 Dresden Mostra sulla mappa Costo totale Nessun dato Moscow State University M.V. Lomonosov Russia Contributo UE Nessun dato Indirizzo 109518 Moscow Mostra sulla mappa Costo totale Nessun dato Universidad Complutense de Madrid Spagna Contributo UE Nessun dato Indirizzo 28040 Madrid Mostra sulla mappa Costo totale Nessun dato Voronezh State University Russia Contributo UE Nessun dato Indirizzo 394693 Voronezh Mostra sulla mappa Costo totale Nessun dato
