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Now showing items 1921-1930 of 2111
Spin-flip noise due to nonequilibrium spin accumulation
(2016)
When current flows through a magnetic tunnel junction (MTJ), there is spin accumulation at the electrode-barrier interfaces if the magnetic moments of the two ferromagnetic electrodes are not aligned. Here we report that ...
Amplified spontaneous emission from a microtube cavity with whispering gallery modes
(2007)
We present a detailed study of the photonic modes in microtube cavity of ~ 7-8 ?m outer diameter that can act as micron-scale optical cylindrical resonator. We demonstrate a new route to the fabrication of individual ...
Radial oscillations of local density of states in carbon nanotubes
(2001)
By performing an analytical study of the electronic structure of metallic carbon nanotubes, we show that the
local density of states exhibits well-defined oscillations as a function of the nanotube radius. The periods ...
Mechanisms and size effects of small to large strain polymerdeformation at the molecular scale
(Trinity College (Dublin, Ireland). School of Physics, 2013)
A core section of mechanics of materials is to understand the relationship of the mechanics to the nanoscale structure. This has been looked at in metals, ceramics, but in polymers has been virtually untouched. While micron ...
Electrical characterization of polymer nanocarbon composites and high yield exfoliation of graphene
(Trinity College (Dublin, Ireland). School of Physics, 2009)
The high aspect ratio, outstanding mechanical properties and high conductivity of
carbon nanotubes makes them ideal candidates for polymer reinforced conducting
composites. Solution processed composites, based on ...
Final Astro-2 calibration of the Hopkins Ultraviolet Telescope
(University of Chicago Press, 1999)
We present the ?nal calibration of the Hopkins Ultraviolet Telescope (HUT) for its ?ight during the
Astro-2 space shuttle mission in 1995 March. Aspects of mission operations and instrument performance
that a?ect data ...
Hot-Volumes as Uniform and Reproducible SERS-Detection Enhancers in Weakly-Coupled Metallic Nanohelices
(2017)
Reproducible and enhanced optical detection of molecules in low concentrations demands
simultaneously intense and homogeneous electric fields acting as robust signal amplifiers. To generate
such sophisticated optical ...
TEXES observations of M supergiants: dynamics and thermodynamics of wind acceleration
(American Astronomical Society, 2009)
We have detected [Fe II] 17.94 ?m and 24.52 ?m emission from a sample of M supergiants (? Cep, ? Sco, ? Ori, CE Tau, AD Per, and ? Her) using the Texas Echelon Cross Echelle Spectrograph on NASA's Infrared Telescope Facility. ...
Reflectance anisotropy spectroscopy of magnetite (110) surfaces
(2014)
Reflectance anisotropy spectroscopy (RAS) has been used to measure the optical anisotropies of bulk and
thin-film Fe3O4(110) surfaces. The spectra indicate that small shifts in energy of the optical transitions, ...