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Title: The development of Reflection Anisotropy Spectroscopy instrumentation for the study of dynamic surface properties
Author: Harrison, Paul
Awarding Body: University of Liverpool
Current Institution: University of Liverpool
Date of Award: 2018
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This thesis develops a detailed analysis of the Reflection Anisotropy Spectroscopy (RAS) technique and provides a clear understanding of how the complex RAS output relates to the anisotropic reflectivity of the sample. A full analysis of the output of the instrument is carried out for any sample orientation that goes beyond the standard procedure of fixing the orientation of the sample. This analysis enables the understanding of how the instrument outputs relate to sample properties. The theoretical analysis of the output of the RAS instrument is complemented by the development of a simulation program in which the optical and electronic components are individually modelled. This makes it possible to predict the output of the instrument as the components are configured in a number of different ways and makes it possible to check for mistakes in the extensive algebra required by the analytical treatment. In order to understand the output obtained by rotating the sample, a novel means of displaying the data is presented. This demonstrates that an assumption that is implicit in the usual analysis of the output of the standard RAS instrument needs careful consideration. The second half of the thesis deals with the development of a fast RAS instrument. The need for a fast instrument arose when studying fast reactions following step potential changes in an electrochemical cell. This has potential applications in the study of protein conformational change. In all, three generations of the design of fast RAS instruments were built, which could form the basis of a commercial instrument.
Supervisor: Weightman, Peter ; Lucas, Christopher Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral