Browsing Physics by Title
Now showing items 1091-1110 of 1870
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Nano Au-decorated boron nitride nanotubes: Conductance modification and field-emission enhancement
(2008)This letter reports the electrical and field-emissionproperties of Au-decorated boron nitride nanotubes (Au-BNNTs). The insulating BNNTs become metallic after Au coating as the Au coverage exceeds a critical value. The Au ... -
Nano-magnetic probing on magnetite (110)
(IEEE Computer Society Press, 2006)We report our results on the structure and magnetic imaging of Fe3O4 (110) thin films using scanning tunneling microscopy/spectroscopy (STM/STS). Based on atomically resolved STM images we present a model for the observed ... -
Nanofabrication and electronic transport properties of silicon nanowires
(Trinity College Dublin. School of Physics. Discipline of Physics, 2019)This project develops a robust and reliable process to pattern sub 20 nm features in negative tone Hydrogen Silsesquioxane (HSQ) resist using high-resolution Electron Beam Lithography (EBL) and a low damage reactive ion ... -
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 ... -
Nanojets and directional emission from symmetric photonic molecules
(2007)Symmetric directional emission of light from multisphere photonic molecules is experimentally shown in this work. The photonic molecules are illuminated in the vertical direction with a defocused laser beam. The emission ... -
Nanomechanical forming studies of thin polymer films
(Trinity College (Dublin, Ireland). School of Physics, 2008)Nanoimprint is a technique that involves mechanical patterning using a rigid patterned stamp on a deformable thin film to produce nanostructures. It is also a technique that is the focus of much research because of the ... -
Nanomechanical Label Free Micro RNA Detection For Cancer And Liver Injury Diagnosis
(Trinity College Dublin. School of Physics. Discipline of Physics, 2019)A biosensor is a device in which a biological component is coupled to a transducer which converts a biological recognition event into a detectable signal. Microribonucleic acid (miRNA, microRNA) are non protein coding ... -
Nanomechanical resonators for clinical coagulation diagnostics and malaria vaccine candidates analysis
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)The development of a microcantilevers-based (MC-based) clinical diagnostic instrument that employs the dynamic mode of operation (microresonators) is presented. The device exploits microresonator arrays that are actively ... -
Nanomechanical sensing
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Nanometer scale mapping of cobalt in Al-doped ferromagnetic Zn 0.7Co0.3O thin film
(2006)There has been a renewed interest in zinc oxide in the materials science community after it was shown to be ferromagnetic when doped with cobalt. However, it has remained difficult to tell whether the origin of the ... -
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 ... -
Nanorheology of squeezed polymer films
(IEEE, 2003)We present investigations of submicrometer quasi-two dimensional flow mechanics of squeezed thin polymer films in the context of nanoimprint lithography. The polymer films were indented by patterned spherical indenters ... -
Nanoscale dissipation and magnetoresistive 1/f noise in spin valves
(2011)Spatial correlations of 1/f noise in yoke-shaped, giant magnetoresistance spin valve sensors are reported. An upper bound of 135 nm, corresponding to a magnetic volume of <10(5) nm(3), is determined for the lateral size ... -
Nanoscale effects governing mechanical reinforcement in composite materials
(Trinity College (Dublin, Ireland). School of Physics, 2013)Nanoscale materials have been studied extensively in the scientific research community in recent years. Due to their impressive mechanical properties, one- and two- dimensional nanomaterials have become candidates as ... -
Nanostructured Electrodes as Catalysts for the Water Splitting Reaction
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)The production of hydrogen through the electrochemical water splitting reaction is an attractive energy storage solution for intermittent natural resources. This comprises of the hydrogen evolution reaction (HER) at the ... -
Narrow-band tunable terahertz emission from ferrimagnetic Mn<inf>3-x</inf>Ga thin films
(2016)Narrow-band terahertz emission from coherently excited spin precession in metallic ferrimagnetic Mn3-xGa Heusler alloy nanofilms has been observed. The efficiency of the emission, per nanometer film thickness, is comparable ... -
NE V and NE VI lines in the ultraviolet spectrum of the symbiotic star RR telescopii
(American Astronomical Society, 1996)New theoretical Ne vi] electron density-sensitive ratios are presented for the intercombination transitions R1 = 1(1006.1 A)/I(999.6 A) and R2 = 1(1010.6 A)/I(999.6 A). Temperature-sensitive ratios are also given for the ... -
Near electrode effects in magneto-electrochemistry
(Trinity College (Dublin, Ireland). School of Physics, 2011)Magnetic fields imposed on electrochemical cells have been shown to have dramatic effects on electrodeposits ranging from surface morphology, crystal structure, deposition rate, alloy composition and magnetic properties. ... -
Near-field relaxation of a quantum emitter to 2D semiconductors: surface dissipation and exciton polaritons
(2016)The total spontaneous emission rate of a quantum emitter in the presence of an infinite MoS2 monolayer is enhanced by several orders of magnitude, compared to its free-space value, due to the excitation of surface exciton ...
