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Now showing items 1191-1200 of 2111
Doping controlled roughness and defined mesoporosity in chemically etched silicon nanowires with tunable conductivity
(2013)
By using Si(100) with different dopant type (n(++)-type (As) or p-type (B)), we show how
metal-assisted chemically etched (MACE) nanowires (NWs) can form with rough outer surfaces
around a solid NW core for p-type NWs, ...
Optical measurement of the ambipolar diffusion length in a ZnCdSe-ZnSe single quantum well
(American Institute of Physics, 1997)
We describe a straightforward technique for the measurement of carrier diffusion in semiconductors. Using an optical microscope we can spatially image luminescence with a resolution of ~ 500 nm. We measured the ambipolar ...
The mechanics of liquid foams: history and new developments
(2011)
The story of some recent developments in foam rheology is related at key points to the remarkable early contributions of Henry Princen, who pioneered the rigorous modern development of the subject. His general approach of ...
From fused aromatics to graphene-like nanoribbons: The effects of multiple terminal groups, length and symmetric pathways on charge transport
(2011)
A class of molecular ribbons, with almost-ideal charge transmission, that is weakly dependent on the anchoring structure or electrode crystalline orientation and easy to synthesize has been identified. Charge transport ...
Relation between grain shape and fractal properties in random Apollonian packing with grain rotation
(2008)
We extend the common theme of random Apollonian packing of circles to consider orientable grains
with a noncircular shape. Systems of up to 106 grains are examined for a range of polygonal and elliptical
shapes using ...
Topological photonics with anisotropic materials
(Trinity College Dublin. School of Physics. Discipline of Physics, 2020)
In this thesis we investigate several aspects of the topological characterisation of light propagating through matter, or topological photonics. Throughout we will focus on anisotropic dielectrics in which the optical ...
Microscopic mechanism of electron transfer through the hydrogen bonds between carboxylated alkanethiol molecules connected to gold electrodes
(2014)
The atomic structure and the electron transfer properties of hydrogen bonds formed between two carboxylated alkanethiol molecules connected to gold electrodes are investigated by employing the non-equilibrium Green's ...
Electro-magnetic control of laser produced plasma
(Trinity College (Dublin, Ireland). School of Physics, 2011)
This thesis describes the results of experiments to investigate the effects of magnetic
and electric fields on the expansion dynamics of a low temperature laser produced plasma. The experiments were done in vacuum using ...
Transformations of Guassian laser beams via conical diffraction : theory, experiment and applications
(Trinity College (Dublin, Ireland). School of Physics, 2011)
The work reported in this thesis concerns the shaping of Gaussian laser beams using conical diffraction. Conical diffraction is the extension to wave optics of internal conical refraction, in which a ray of light incident ...