Browsing Physics (Scholarly Publications) by Title
Now showing items 916-935 of 1540
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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 ... -
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 sensing
(2012) -
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 ... -
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 ... -
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-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 ... -
Near-infrared dye having a large ultrafast third-order susceptibility
(1986)Efficient degenerate four-wave mixing of 160-psec infrared light pulses at ? = 1.064 ?m in solutions of a new dye that absorbs between 1.0 and 1.6 ?m is reported. A Kerr-like third-order susceptibility of X(3)xyyx = 8 ? ... -
Near-simultaneous observations of direct and Raman-scattered Lines in the Symbiotic Star Z Andromedae
(American Astronomical Society, 1998)Symbiotic binary stars typically consist of a hot compact star orbiting a cool giant. Overlaid on the continuum from these stars is a nebular spectrum produced by the photoionization of the cool star wind by the hot star. ... -
Negative Gauge Factor Piezoresistive Composites Based on Polymers Filled with MoS2 Nanosheets
(2019)Nanocomposite strain sensors, particularly those consisting of polymer–graphene composites, are increasingly common and are of great interest in the area of wearable sensors. In such sensors, application of strain yields ... -
Negative magnetoresistance in dual spin valve structures with a synthetic antiferromagnetic free layer
(IEEE, 2009)Giant magnetoresistance (GMR) in spin valves is due to spin-dependent scattering occurring at ferromagnet/normal metal (F/N) interfaces and/or in the ferromagnetic layers. In a spin valve with a typical F/N/F structure ... -
Negative magnetoresistance in Fe3O4/Au/Fe spin valves
(American Physical Society, 2004)The structural, electrical, and magnetic properties of Fe3O4 /Au/Fe spin valves on MgOs001d are presented. In contrast to more conventional spin valve structures, the current-in-plane resistance of the Fe3O4 /Au/Fe ... -
Neutral excitation density-functional theory: an efficient and variational first-principles method for simulating neutral excitations in molecules.
(2020)We introduce neutral excitation density-functional theory (XDFT), a computationally light, generally applicable, first-principles technique for calculating neutral electronic excitations. The concept is to generalise ... -
Neutron imaging of liquid-liquid systems containing paramagnetic salt solutions
(2019)The method of neutron imaging was adopted to map the concentration evolution of aqueous paramagnetic Gd(NO3)3 solutions. Magnetic manipulation of the paramagnetic liquid within a miscible nonmagnetic liquid is possible ...
