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Full-Text Articles in Physics
Structure Property Relationships In Organic Conjugated Systems, Luke O'Neill
Structure Property Relationships In Organic Conjugated Systems, Luke O'Neill
Doctoral
A series of pi(п) conjugated oligomers containing 1 to 6 monomer units were studied by absorption and photoluminescence spectroscopies. The results are discussed and examined with regard to the variation of the optical properties with the increase of effective conjugation length. It was found that there was a linear relationship between the positioning of the absorption and photoluminescence maxima plotted against inverse conjugation length. The relationships are in good agreement with the simple particle in a box method, one of the earliest descriptions of the properties of one-dimensional organic molecules. Variations in the infinite chain limit band gap for a …
Quantification Of The Environmental Solar Ultraviolet Radiation Field At The Human Eye And The Investigation Of Peripherally Focused Rays., David P. Fleming
Quantification Of The Environmental Solar Ultraviolet Radiation Field At The Human Eye And The Investigation Of Peripherally Focused Rays., David P. Fleming
Doctoral
The increase of terrestrial solar ultraviolet radiation (UVR) due to the reduction of the ozone layer has promoted a variety of research into establishing the impact of this elevated potential dose of UVR on biological tissues. Anterior ocular tissues such as the cornea have been found to be susceptible to damage by terrestrial solar UVR and diseases such as pterygium are commonly thought to be a direct result of absorbed UVR at the nasal limbus. There is a need for more accurate quantification and localisation of incident UVR at the anterior ocular surface. A novel solar blind photodiode sensor array …
Digital Close Range Photogrammetry In Motor Vehicle Accident Reconstruction, Fiona Coyle
Digital Close Range Photogrammetry In Motor Vehicle Accident Reconstruction, Fiona Coyle
Doctoral
Road traffic accidents are consistently in the top ten causes of death world-wide. In order to reduce the number of fatalities caused by traffic collision, better knowledge and understanding of the sequence of events prior to and during a traffic accident, i.e. Accident Reconstruction, is required, so it is important to obtain detailed quantitative information about the damage sustained by the crashed vehicle(s). The research reported here was aimed at developing a fast and accurate method of measuring the damage. Digital Close Range Photogrammetry is the technique chosen for obtaining vehicle profiles from which accurate measurements of crust damage could …
Investigation Of The Electronic Properties Of Organic Systems Using Electroabsorption Spectroscopy, Garrett F. Farrell
Investigation Of The Electronic Properties Of Organic Systems Using Electroabsorption Spectroscopy, Garrett F. Farrell
Doctoral
The aim of this project is to investigate the effect of bulk structural modification on the electronic properties of fullerene systems as measured using electronic and Electroabsorption (EA) spectroscopy. The existence of a unique solid state feature in C60 is the first indication that the material’s electronic properties may be influenced by its crystalline environment and as such merits investigation. The nature and extent of these interactions in the solid state is still unclear, in particular whether the molecular electrons remain located on the individual molecules or whether they are delocalised across the solid. The extent of these interactions has …