Chemical State and Luminescence Imaging of Natural and Synthetic Diamond


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dc.contributor.advisor Evans, Andrew Jones, Geraint Owen 2011-05-16T09:36:24Z 2011-05-16T09:36:24Z 2011
dc.description.abstract This thesis presents work undertaken using Synchrotron and Laboratory based techniques in parallel on the Chemical State and Luminescence Imaging of Natural and Synthetic Diamond. X-ray absorption spectroscopy (XAS) techniques have revealed information on the chemical structure and bonding within brown and variegated type Ia, IIa, CVD and high-pressure, high-temperature (HPHT) treated diamonds. XAS, Raman, X-ray Excited Optical Luminescence (XEOL) and Photoluminescence (PL) are some of the techniques that have been applied to characterise and investigate the cause of the brown colouration. The XAS measurements have been undertaken in imaging mode with the capabilities of correlating the luminescence image with the brown regions in partial luminescence yield (PLY) and total luminescence yield (TLY). OD-XAS spectrums have been obtained at non-brown and brown regions and have revealed a higher concentration of sp2-bonded carbon present at the brown sites. Raman spectroscopy utilized in imaging mode also supports this discovery. en_UK
dc.description.sponsorship EPSRC and a CASE award from the DTC (Diamond Trading Company) en_UK
dc.language.iso en en_UK
dc.publisher Aberystwyth University en_UK
dc.subject point defects in diamond en_UK
dc.subject medicine en_UK
dc.subject HPHT treatment en_UK
dc.title Chemical State and Luminescence Imaging of Natural and Synthetic Diamond en_UK
dc.type Text en
dc.publisher.department Mathematical and Physical Sciences en_UK
dc.type.qualificationlevel doctoral en_UK
dc.type.qualificationname PhD en_UK
dc.type.publicationtype thesis or dissertation en

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