Développement, caractérisation et validation expérimentale de microsystèmes capteurs de gaz à base de métallophtalocyanines pour le suivi des hydrocarbures aromatiques dans l'air

Development, characterization and experimental validation of metallophthalocyanines based microsensors devoted to monocyclic aromatic hydrocarbon monitoring in air

• Auteur / Autrice : Abhishek Kumar
• Direction : Christelle Varenne, Jérôme Brunet
• Type : Thèse de doctorat
• Discipline(s) : Matériaux et Composants pour l'Electronique
• Date : Soutenance le 07/12/2015
• Etablissement(s) : Clermont-Ferrand 2
• Ecole(s) doctorale(s) : École doctorale des sciences pour l'ingénieur (Clermont-Ferrand)
• Partenaire(s) de recherche : Laboratoire : Institut Pascal (Aubière, Puy-de-Dôme) - Institut Pascal
• Jury : Président / Présidente : Alain Pauly
• Jury : Examinateurs / Examinatrices : Christelle Varenne, Jérôme Brunet, Klaus Dieter Schierbaum
• Jury : Rapporteurs / Rapporteuses : Mohamed Mehdi Chehimi, Eduard Llobet

Mots clés

Mots clés contrôlés

Composés aromatiques

Phtalocyanines

Air -- Qualité

Mots clés libres

Phtalocyanines

Microbalance à quartz

BTX

Capteur de gaz

Contrôle de la qualité de l'air

Couche mince

Caractérisation physico-chimique

Interaction gaz/phtalocyanine

Gas sensors

Microsystems

Organic macromolecular materials

Phthalocyanines

QCM sensors

Air quality control

Aromatic interactions

Résumé

Résumé indisponible

This PhD work is dedicated to investigate potentialities of phthalocyanines materials to realize a Quartz Crystal Microbalance (QCM) sensor for Benzene, Toluene and Xylenes (BTX) detection in air. The goal is to develop a sensor-microsystem capable of measuring BTX concentrations quantitatively below the environmental guidelines with sufficient accuracy. To achieve these objectives, our strategies mainly focused on experimental works encompassing sensors realization, sensing material characterizations, development of gas-testing facility and sensor testing for different target gases. One of the main aims is to identify most appropriate phthalocyanine material for sensor development. After comparative sensing studies, tert-butyl-copper phthalocyanine based QCM device is found as most sensitive and detail metrological characteristics are further investigated. Results show repeatable, reversible and high magnitude of response, low response and recovery times, sub-ppm range detection limit, high resolutions and combined selectivity of BTX gases among common atmospheric pollutants. Special focus is given to understand the gas/material interactions which are achieved by (a) XRD and SEM characterizations of sensing layers, (b) formalization of a two-step adsorption model and (c) assessing extent of diffusion of target gas in sensing layer. At last, possible ageing of sensor and suitable storage conditions to prevent such effect are investigated.