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Title: High throughput development of optical and potentiometric carbon dioxide sensors
Author: Lewis, M. J.
Awarding Body: University of Wales Swansea
Current Institution: Swansea University
Date of Award: 2003
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This thesis documents studies directed towards the development of robust carbon dioxide sensors based on two different transducing principles: optical and potentiometric measurement. Also described is the development and implementation of novel high throughput synthesis and measurement systems designed specifically for application in the development of polymeric sensing films and electrolytes. The experimental methods employed and the development and optimisation of high-throughput synthesis and measurement systems for experimentation with optically and electronically responsive, thin-film, gas sensing electrolytes are described in Chapters 2 and 3. The adaptation of existing machinery, the design of measurement apparatus and the visualisation of data is shown. Chapters 4 and 5 describe the investigation into the notionally ‘ideal’ components of a thin-film, optical carbon, dioxide sensor incorporating monomeric quaternary ammonium bases. Using criteria such as chemical and physical stability, an optimally stable sensor formulation is found and fully characterised for its response to carbon dioxide and compared to a sensor described in literature. In Chapter 6, the fabrication of optical CO2 sensors using plasticized polymeric quaternary bases is described. Sixty-two sensors were synthesised, characterised and screened using the high-throughput system described in Chapters 2 and 3. Chapter 7 describes the fabrication and complete characterisation of a novel, planar, solid-state, Severinghaus-type CO2 sensor incorporating a polymer electrolyte gel similar to the polymeric sensor described in Chapters 4 and 5. Chapter 8 describes the design and fabrication of an array of such Severinghaus-type electrodes for application in the high-throughput screening of electrolytes for acid/base gas sensing. Also described is a preliminary measurement of a single substrate of sixty-four sensors.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available