Auteur / Autrice : | Allison Wilhelm |
Direction : | Bruno Bureau, Pierre Lucas |
Type : | Thèse de doctorat |
Discipline(s) : | Chimie |
Date : | Soutenance en 2009 |
Etablissement(s) : | Rennes 1 en cotutelle avec University of Arizona |
Ecole(s) doctorale(s) : | École doctorale Sciences de la matière (Rennes ; 1996-2016) |
Partenaire(s) de recherche : | autre partenaire : Université européenne de Bretagne (2007-2016) |
Mots clés
Mots clés contrôlés
Résumé
Chalcogenide glasses are well suited for biological sensing applications due to their rheological properties and broad transparency range in the mid-infrared. This broad transparency range is of particular importance as it corresponds to the region of strong fundamental vibrational modes of organic and biologically relevant molecules; a characteristic not held by traditional oxide glasses. More specifically, tellurium based chalcogenide glasses exhibit promising characteristics for use in space and bio-sensing applications due to a transmission window that extends even further into the IR. Compositions such as Te2As3Se5 have optimal rheological and excellent optical properties for use in a wide range of IR sensing applications. However, through the investigation of new tellurium based chalcogenide glass compositions these already significant optical properties can be augmented; opening up an even larger number of IR applications, such as the detection of CO2, requiring an extended transparency in the IR. In the present work it has been shown that: 1. The commonly used Te2As3Se5 (TAS) glass does not pose a toxic threat to biological molecules after removal of a surface oxide layer, 2. The chalcogenide glass composition Ge20Te73I7 has excellent properties nicely suited for biological and space sensing applications requiring an extended IR transparency and advanced optical components, 3. Tellurium based glasses with conductive properties show great promise for use in a novel approach to the detection of viruses in an aqueous environment.