Materials Literature
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The full-specification Super Hi-Vision image sensor realizes 4320 lines of 7680 pixels at 120 frames per second with 12- bit resolution. This sensor requires both high sensitivity and high frame rate, because the illumination per frame decreases as the frame rate increases. Sensitivity of the back-side-illuminated sen…
The aim of this paper is to describe the design and simulation of an optical waveguide for its potential integration with an optical source based on silicon rich oxide (SRO), on a silicon substrate. SRO deposited by Low Pressure Chemical Vapor Deposition (LPCVD) has emission of light in the visible range, and then our…
This work summarizes how plasmonic phenomena can enhance the fluorescence of lanthanides (Ln3+) coupled to metallic nanoparticles (MNP). Lanthanide-ions emission lines, based on 4f-4f transitions, are weak due to Laporte selection rules for optical transitions. This effect results in low absorption cross sections for…
We report on the properties and growth kinetics of defect-free, photoluminescence (PL) efficient mushroom-like nanowires (MNWs) in the form of ~30nm thick hexagonal-shaped InGaN-nanodisk on GaN nanowires, coexisting with the conventional rod-like InGaN-on-GaN nanowires (RNWs) on (111)-silicon-substrate. When character…
Synergizing graphene on silicon based nanostructures is pivotal in advancing nano-electronic device technology. A combination of molecular dynamics and density functional theory has been used to predict the electronic energy band structure and photo-emission spectrum for graphene-Si system with silicon as a substrate…
Doping of amorphous chalcogenide films of rather dissimilar bonding type and resistivity, namely, Ga-La-S, GeTe, and Ge-Sb-Te by means of ion implantation of bismuth is considered. To characterize defects induced by ionbeam implantation space-charge-limited conduction and capacitance-voltage characteristics of amorpho…
ABSTRACT The effects of sodium sulfite (SS) content and injection molding temperature on the viscoelasticity of bloodmeal‐based thermoplastics were assessed using creep, recovery, and stress relaxation. Both SS and processing temperature affected standard mechanical properties and time‐dependent behavior. Increased SS…
Melt transcription molding is one of novel processes suitable for manufacturing large-area thin film with microstructures. We designed the mold which enables to transfer structures on both surfaces for the melt transcription molding machine and examined about relations of temperature and pressure on the accuracy of di…
We theoretically study the emission decay rate of a light emitter on thin Au films based on a semiclassical point-dipole model. The complex dielectric functions of Au films determined by spectroscopic ellipsometry are used in this calculation model. We investigate the dependences of the decay rate on the metal thickne…
An atomic force microscope is used to measure the molecular forces between two carbon monoxide (CO) molecules. [Also see Report by Weymouth et al. ]
Nanowire (NW) based light emitting diodes (LEDs) have drawn great research interest due to many advantages compared to thin film based devices. Marked improved performances are expected from nanostructured active layers for light emission. Semiconducting oxide nanowires can act as direct waveguides and favor emitted l…
The interest in 2-dimensional systems with a honeycomb lattice and related Dirac-type electronic bands has exceeded the prototype graphene1. Currently, 2-dimensional atomic2,3 and nanoscale4-8 systems are extensively investigated in the search for materials with novel electronic properties that can be tailored by g…
Simulation of III-nitride color-coded multiple quantum well (MQW) LED structures was performed using as an experimental benchmark dichromatic semipolar LEDs grown in Ga-polar and N-polar crystallographic orientations (Y. Kawaguchi et.al, APL 100, 231110, 2012). Different QW depths in the color-coded LEDs and opposite…
We performed experiments and data analysis to determine how powder morphology and particle size affect X-ray attenuation (CT number or CTN). These experiments were performed on a CT system with an isotropic resolution of (0.15 mm)3, and an endpoint energy of 160kV. Powders with effective atomic number (Ze) within ±0.2…
Diffusion lengths of photo-excited carriers along the c-direction were determined from photoluminescence (PL) measurements in p- and n-type GaN epitaxial layers grown on c-plane sapphire by metal-organic chemical vapor deposition. The investigated samples incorporate a 6 nm thick In0.15Ga0.85N active layer capped with…
The microstructure and internal friction of Ni–Ti alloys after hydrogen absorption have been investigated by means of optical microscopy, X-ray diffraction, differential scanning calorimetry and low frequency torsional internal friction apparatus. The results show that, after hydrogen absorption, the grains tend to be…
High concentrations of the rare-earth elements erbium, holmium and thulium have been successfully doped into single crystal (SC) yttrium aluminum garnet (YAG, Y3Al5O12) fibers by use of the laser heated pedestal growth (LHPG) method. The spontaneous emission spectra and fluorescence were measured in the near-infrared…
Hollow silica microspheres (HSMs) with different structures have been synthesized using sacrificed hard template route combined with multiple sol–gel silica shell coating steps. The synthesized HSMs were characterized by SEM and N 2 sorption measurements and employed as the stationary phase in thin layer chromatograph…
We exploit epitaxial relationships of rutile-type VO2 with (0001) Al2O3, (111) LaAlO3, (10‾10) Al2O3, and (10‾12) Al2O3 to achieve high-quality VO2 thin-film synthesis. We show that the deposition temperature can be lowered when these substrates are employed compared to one with no preferred crystallographic relations…
Cell and gene cancer therapies require ex vivo cell processing of human grafts. Such processing requires at least three steps – cell enrichment, cell separation (destruction), and gene transfer – each of which requires the use of a separate technology. While these technologies may be satisfactory for research use, the…