In this research, we aim to achieve sub-mK effective electron measurements to better analyze effects that occur at these very low temperatures. We do this by using a Faraday cage, through which we...Show moreIn this research, we aim to achieve sub-mK effective electron measurements to better analyze effects that occur at these very low temperatures. We do this by using a Faraday cage, through which we send a signal using sets of inductors. In order to test this, we define an effective frequency range for our signal by analyzing the theoretical electrical side effects that occur in our system. We perform multiple room temperature tests on our system within the defined frequency range, and work towards testing the effectiveness of our system at millikelvin temperatures as well.Show less
In this study we investigate if we can change the interfacial conductivity in LaAlO3/SrTiO3 heterostructures by adding some oxygen to the argon sputter gas. We vary the deposition parameters to...Show moreIn this study we investigate if we can change the interfacial conductivity in LaAlO3/SrTiO3 heterostructures by adding some oxygen to the argon sputter gas. We vary the deposition parameters to minimise the effect of the oxygen. We find that an increase in oxygen partial pressure increases the surface roughness. We also find that an increase in argon flow increases surface roughness. The optimised parameters, which minimise surface roughness, are in agreement with previous results of growing a conducting interface in LaAlO3/SrTiO3 by sputtering. However all our samples grown with oxygen are found to be insulating. A possible explanation for the effect of oxygen in the sputter gas is that the species oxidise before reaching the sample. We conclude that even a very small amount of oxygen in the sputter gas gives an insulating interface and that we can not make a conducting interface with oxygen in the sputter gas with the experimental set-up used.Show less
This work examines the network structure of illicit marketplaces that operate on the darknet. These on-line marketplaces are crawled to obtain data of inter-user communications and this data is...Show moreThis work examines the network structure of illicit marketplaces that operate on the darknet. These on-line marketplaces are crawled to obtain data of inter-user communications and this data is parsed in a network structure and its physical properties are analysed. The Configuration Model is used as a null model to investigate the patterns in these networks to reveal information about their topology. This information is applied to interpret the behaviour of users within these illegal marketplaces.Show less
Colloidal particles at a liquid-liquid interface can order into interesting structures. In this work poly(methyl methacrylate) colloids with a core-shell structure have been synthesized and studied...Show moreColloidal particles at a liquid-liquid interface can order into interesting structures. In this work poly(methyl methacrylate) colloids with a core-shell structure have been synthesized and studied. They have been clustered to create anisotropic particles with regular shapes. Their structure is optimal for studies at water-oil interface with both bright field and confocal microscopy. The stability of the colloids has been tested in aqueous and organic media with single and clustered particles. Both single spherical particles and clusters have been observed at an water-oil interface. A computational project related to self-assembly problem in virus-like protein capsid is presented inShow less
The KM3NeT/ORCA experiment will use part of the detector which is currently being built in the Mediterranean Sea to determine the neutrino mass hierarchy by measuring the pattern of atmospheric...Show moreThe KM3NeT/ORCA experiment will use part of the detector which is currently being built in the Mediterranean Sea to determine the neutrino mass hierarchy by measuring the pattern of atmospheric neutrino oscillations. In this thesis, in addition to the neutrino oscillations in the Earth, the oscillations in the atmosphere have been included in the simulations and the impact of the atmosphere on the measurements has been evaluatedShow less