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Now showing items 1001-1010 of 2111
Interplay of bulk and interface effects in the electric-field-driven transition in magnetite
(2010)
Contact effects in devices incorporating strongly correlated electronic materials are comparatively unexplored.
We have investigated the electrically driven phase transition in magnetite 100 thin films by fourterminal
methods. ...
Increased response/recovery lifetimes and reinforcement of Polyaniline Nanofiber Films using Carbon Nanotubes
(2012)
We have prepared high surface area, conductive, mechanically robust, responsive polyaniline-carbon nanotune composite films. These were produced by filtration from dilute dispersions of polyaniline nanofibers and single-walled ...
Scanning near-field microscopy of microwave circuits
(Trinity College (Dublin, Ireland). School of Physics, 2002)
The topic of this thesis is the development and testing of measurement techniques for high resolution imaging of the field induced by microwave circuits in the near-field region. The theoretical aspects of the near-field ...
Nanopatterning magnetic materials - Cr/Mo(110) epitaxial system and Fe3O4(111) surface
(Trinity College (Dublin, Ireland). School of Physics, 2006)
This thesis presents the investigation of the Cr/Mo(110) epitaxial interface.
The study combines experimental techniques in the form of scanning
tunneling microscopy (STM), low energy electron diffraction (LEED), and
Auger ...
Nitrogen doping of metallic single-walled carbon nanotubes:n-type conduction and dipole scattering
(IOP Publishing, 2007)
The charge transport properties of individual, metallic nitrogen doped, single-walled carbon nanotubes are investigated. It is demonstrated that n-type conduction can be achieved by nitrogen doping. Evidence was obtained ...
Langmuir probe measurements and mass spectrometry of plasma plumes generated by laser ablation of La0.4Ca0.6MnO3
(2014)
The plasma formed in vacuum by UV nanosecond laser ablation of La0.4Ca0.6MnO3 in the fluence range of 0.8 to 1.9 J cm−2 using both Langmuir probe analysis and energy-resolved mass spectrometry has been studied. Mass ...
Electron localization in mixed-valence manganites
(American Physical Society, 1995)
Mixed-valence manganites (A3+0.7B2+0.3)MnO3 exhibit a resistivity peak with giant negative magnetoresistance below the Curie point. Residual resistivity ranges from 5?10-8 to 8?103 m, but the electronic heat capacity when ...
Nanogaps with very large aspect ratios for electrical measurements
(2008)
For nanoscale electrical characterization and device fabrication, it is often desirable to fabricate planar metal electrodes separated by large aspect ratio gaps with interelectrode distances well below 100?nm. We demonstrate ...
Dispersion monitoring for high-speed WDM networks via two-photon absorption in a semiconductor microcavity
(2006)
Due to the continued demand for bandwidth, network operators have to increase the data rates at which individual wavelengths operate at. As these data rates will exceed 100 Gbit/s in the next 5-10 years, it will be crucial ...
ALMA sub-mm maser and dust distribution of VY Canis Majoris
(2014)
Cool, evolved stars have copious, enriched winds. Observations have so far not fully constrained models for the shaping and acceleration of these winds. We need to understand the dynamics better, from the pulsating stellar ...