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Now showing items 341-350 of 2110
Enhanced magnetoresistance effect in layered systems
(1999)
Magnetoresistance ratios several orders of magnitude higher than those of conventional multilayers
may be obtained with much smaller saturation fields in magnetic layers separated by a periodically
modulated structure. ...
3.8 dB Noise figure in bulk semiconductor optical amplifier
(2013)
The present paper reports numerical and experimental investigation of noise figure of a multi-section semiconductor optical amplifier. The designed amplifier shows a 3.8dB noise figure, which seems to be the lowest figure ...
Topological Tuning in Three-Dimensional Dirac Semimetals
(2014)
We study with first-principles methods the interplay between bulk and surface Dirac fermions in three dimensional Dirac semimetals. By combining density functional theory with the coherent potential approximation, we reveal ...
Avoiding Resistance Limitations in High-Performance Transparent Supercapacitor Electrodes Based on Large-Area, High-Conductivity PEDOT:PSS Films
(2015)
This work describes the potential of thin, spray-deposited, large-area poly(3,4-ethylenedioxythiophene)/poly(styrene-4-sulfonate) (
PEDOT:
PSS) conducting polymer films for use as transparent supercapacitor electrodes. ...
H-alpha emission lines in high-redshift quasars
(1989)
Infrared spectra have been obtained of the H-alpha lines in 18 medium- to high-redshift QSOs and optical spectra taken nearly simultaneously to measure the strong UV line. It is found that the H-alpha line is redshifted ...
Continuous wave MRI of heterogeneous materials
(Elsevier, 2003)
A prototype continuous wave MRI system operating at 7T has been used successfully to study a variety of heterogeneous
materials exhibiting T2 relaxation values ranging from 10 ls to 50 ms. Two-dimensional images of a ...
Effect of epitaxial strain on the cation distribution in spinel ferrites CoFe(2)O(4) and NiFe(2)O(4): A density functional theory study
(American Institute of Physics, 2011)
The effect of epitaxial strain on the cation distribution in spinel ferrites CoFe(2)O(4) and NiFe(2)O(4) is investigated by GGA+U total energy calculations. We obtain a very strong (moderate) tendency for cation inversion ...
Finite element method simulations of heat flow in fixed bed solar water splitting redox reactors
(2012)
An improved design for radiation absorption and heat flow into materials with low thermal
conductivity is demonstrated. The design was developed for application in fixed bed two
step solar water splitting redox reactors. ...
Bridging the Gap between SERS Ehnancement and Reproducibility by Salt Aggregated Silver Nanoparticles
(2015)
Silver colloid based nanostructures are a very common
means of achieving strong SERS signals. This is due to
the hot spots that are formed in between the nanoparti‐
cles, as well as their ease of synthesis. They are ...
Large-scale production of size-controlled MoS2 nanosheets by shear exfoliation
(2015)
In order to fulfil their potential for applications, it will be necessary to develop large-scale production methods for two-dimensional (2D) inorganic nanosheets. Here we demonstrate the large-scale shear-exfoliation of ...