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Now showing items 1551-1560 of 2111
Analysis of the foam-forming of non-woven lightweight fibrous materials using X-ray tomography
(2021)
Foam-forming has in the past predominantly been used to create two-dimensional sheet-like fibrous materials. Allowing the foam to drain freely and decay under gravity, rather than applying a vacuum to remove it rapidly, ...
Signal quality monitoring for optical communications networks
(Trinity College (Dublin, Ireland). School of Physics, 2010)
The subject of this thesis is optical performance monitoring for transparent optical
communications networks. To this end, a series of techniques for the characterisation of
ultrashort telecommunications pulses were ...
Role of defects in ferromagnetism in Zn1-xCoxO: A hybrid density functional study
(2006)
Experimental studies of Zn1−xCoxO as thin films or nanocrystals have found ferromagnetism and Curie temperatures above room temperature and that p- or n-type doping of Zn1−xCoxO can change its magnetic state. Bulk Zn1−xCoxO ...
Dynamic response of ammonia sensors constructed from polyaniline nanofibre films with varying morphology
(2012)
Polyaniline is acid-doped with HCl, HNO3, HClO4, HBr or H2SO4 to yield thin films that are nanofibrous or dense. The nanofibrous films show a faster response to ammonia gas, and the response is greater when the films are ...
Chromatic dispersion monitoring of 80 Gbps OTDM data signal via two-photon absorption in a semiconductor microcavity
(2007)
In this letter, a novel method of chromatic dispersion monitoring via two-photon absorption (TPA) is investigated. A specially designed semiconductor microcavity is employed as a TPA detector for monitoring ...
Computational design of usual magnetic tunnel junctions
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)
Tunneling magnetoresistance in Si nanowires
(2016)
We investigate the tunneling magnetoresistance of small diameter semiconducting Si nanowires
attached to ferromagnetic Fe electrodes, using
fi
rst principles density functional theory combined
with the non-equilibrium ...
Temperature dependent photoluminescence of nanocrystalline γ-CuCl hybrid films
(2014)
Organic–inorganic hybrid films combine the basic properties of organic and inorganic materials and offer special advantages that enhance optical, thermal and mechanical properties. We have studied the temperature dependent ...
Localised surface plasmon mediated energy transfer in quantum dot systems
(Trinity College (Dublin, Ireland). School of Physics, 2015)
Nonradiative energy transfer to metal nanoparticles (NPs) is a technique used for optical- based distance measurements which is often implemented in sensing. Both Forster resonant energy transfer (FRET) and nanometal surface ...
Structural and optoelectronic properties of sputtered copper(I) chloride
(2005)
Copper (I) Chloride is a wide band gap semiconductor with great potential for silicon-based optoelectronics due to the fact that is closely lattice matched with silicon. This work examines the deposition of CuCl thin films ...