Browsing Physics by Title
Now showing items 165-184 of 2105
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Calculation of gain?current characteristics in ZnCdSe?ZnSe quantum well structures including many body effects.
(American Institute of Physics, 1996)The gain-spontaneous recombination characteristics have been calculated for a 40 ? Zn0.8Cd0.2Se-ZnSe quantum well including many body effects. We examine the effect of the inclusion of the Coulomb enhancement on the gain ... -
Calculation of model Hamiltonian parameters for LaMnO3 using maximally localized Wannier functions
(2010)In this work we demonstrate that maximally localized Wannier functions (MLWFs) based on Kohn-Sham band structures provide a very robust and systematic way to construct realistic, materials-specific tight-binding models for ... -
CALPHAD-assisted development of in-situ nanocrystallised melt-spun Co-Fe-B alloy with high Bs (1.57 T)
(2021)A thermodynamics-based approach, Calculation of Phase Diagram (CALPHAD), combined with topological instability parameters are proposed and experimentally evaluated, in order to optimise in-situ nanocrystallisation of rapidly ... -
Can soap films be used as models for mortality studies?
(2018)We report studies of the life expectancy of sets of parallel liquid films made from surfactant solution and contained in cylindrical perspex tubes. The tubes are sealed at the bottom and vertically placed. From our analysis ... -
Capacitive micromachined ultrasonic transducers for chemical detection in nitrogen
(2007)The authors present the prototype of a chemical sensor using a capacitive micromachined ultrasonic transducer array. Each element in the array consists of a large number of resonating membranes connected in parallel. A ... -
Carbon Nanomaterials for Improved Performance of Perovskite Solar Cells Processed under High Humidity
(Trinity College Dublin. School of Physics. Discipline of Physics, 2019)The work documented in this thesis concerns optimization of stacks of semiconducting materials for photovoltaic purposes. Hybrid organic-inorganic metal halide perovskite (MHP) is a promising semiconducting material for ... -
Carbon nanotube: a low-loss spin-current waveguide
(2010)We demonstrate with a quantum-mechanical approach that carbon nanotubes are excellent spin-current waveguides and are able to carry information stored in a precessing magnetic moment for long distances with very little ... -
Carbon nanotubes and nanotube composites for nonlinear optical devices
(2009)Carbon nanotubes possess not only outstanding mechanical, electrical and thermal properties but also unique nonlinear optical properties. In this Feature Article, we review the recent developments of the carbon nanotube ... -
Carrier density dependence of plasmonenhanced nonradiative energy transfer in a hybrid quantum well-quantum dot structure
(2015)An array of Ag nanoboxes fabricated by helium-ion lithography is used to demonstrate plasmon-enhanced nonradiative energy transfer in a hybrid quantum well-quantum dot structure. The nonradiative energy transfer, from an ... -
Carrier-density dependence of the photoluminescence lifetimes in ZnCdSe/ZnSSe quantum wells at room temperature
(1999)Photoluminescence lifetimes have been measured at room temperature as a function of carrier density in ZnCdSe/ZnSSe quantum wells. We show that, at low carrier density (53109?5 31010 cm22), nonradiative recombination ... -
CdTe Quantum Dot/Dye Hybrid System as Photosensitizer for Photodynamic Therapy
(2010)We have studied the photodynamic properties of novel CdTe quantum dots?methylene blue hybrid photosensitizer. Absorption spectroscopy, photolumines- cence spectroscopy, and fluorescence lifetime imaging of this system ... -
Cerium dioxide redox cycle for fuel production
(Trinity College (Dublin, Ireland). School of Physics, 2015)The following thesis covers a number of topics related to thermochemical fuel production using the CeO2 redox cycle. Chapter 1 gives an introduction to the topic, providing motivation, historical development and the main ... -
Chandra observations of coronal emission from the early-G supergiants Alpha and Beta Aquarii
(University of Colorado, 2005)We report Chandra detections of coronal X-rays from the early-G supergiants ? Aquarii (HD209750: G2 Ib) and ? Aquarii (HD204867: G0 Ib). Previous ROSAT observations of these archetype \hybrid chromosphere" stars were ... -
Chapter 16: The structure of liquid foams
(CRC Press, 2018) -
Characterisation and Manipulation of Transition Metal Dichalcogenides via Atomic Force Microscopy
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)Scanning probe microscopy (SPM) has revolutionised nanotechnology and allowed the study and manipulation of materials at the nanoscale, making it ideal for the study of solid-state physics and semiconductor technologies. ... -
Characterisation of a fast microcapillary discharge plasma using a compact multi-deflector Thomson parabola ion analyser
(IEEE, 2001)A compact Thomson parabola ion analyser has been developed and tested on a fast microcapillary plasma discharge. The discharge cell comprises a circular parallel-plate capacitor (1 - 2 nF) with a 50 micron sized hole in ... -
Characterisation of laser produced plasmas
(Trinity College (Dublin, Ireland). School of Physics, 2006)This thesis describes the apphcation of planar Langmuir probes in laser produced plasmas. The influence of the ion flow on the probe behaviour and its effect on the measured plasma parameters has been investigated for ... -
Characterisation of materials under thermal and electrical stimuli using in-situ electron microscopy and MEMS technology
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)Abstract To incorporate nanomaterials into functional devices we need to fully understand the materials characteristics. This includes electrical, optical, mechanical and most important for us the thermal properties. The ... -
Characterisation of n-type γ-CuCl on Si for UV optoelectronic applications
(2007)The use of co-evaporation of ZnCl2 with CuCl in order to achieve n-type conductivity in CuCl is reported herein. Linear current–voltage (IV) characteristics in the range of ±4 V have been measured using Cu–Au electrical ...