Materials Literature
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A novel concept is introduced that utilizes the scattering properties of zinc oxide nanorods to control light guidance and leakage inside optical fibers coated with nanorods. The effect of the hydrothermal growth conditions of the nanorods on light scattering and coupling to optical fiber are experimentally investigat…
Metallic silver-gold nanoparticles (1–5 nm) encapsulated into carbon nanospheres (20–30 nm) were synthesized via laser-induced chemical liquid phase deposition. The obtained carbon-silver-gold nanostructures were characterized by high specific surface area and demonstrated high sensitivity as a material for surface-en…
Metal–organic frameworks with open metal sites such as Cu-BTC have the potential to improve separations of molecules of differing polarities. In the Cu-BTC structure, molecules with high dipole moment such as water are preferentially adsorbed in the cages containing the open metal sites, while less polar molecules suc…
We propose a planar ultrathin absorber concept exploiting plasmonic resonance absorption enhancement. We calculate a maximum absorption of 89.8% for TM-polarized normally incident light in a 5-nm thin-film absorber with a single-pass absorption of only 1.7%, i.e., a 53 times increase in absorption. Broadband and wide-…
Cerium oxide (CeO2) thin films have been grown by metal-organic chemical vapor deposition on AlGaN/GaN heterostructures and their insulating properties as gate dielectric layer have been explored. The deposited thin films have been found to be textured on the GaN based heterostructures and exhibited a permittivity of…
The photophysical properties associated with solid-state Ru-based SO 2 linkage photoisomerism are shown to differ with single-molecule recognition; this stands to afford superior optical resolution for data storage applications. Two compounds, [Ru(NH 3 ) 4 SO 2 X ]tosylate 2 ( X = isonicotinamide ( 1 ) and isonicotini…
It is demonstrated that photoluminescence of DCJTB can be enhanced by surface plasmons occurred in silver nanoparticle arrays on glass substrates fabricated by using nanosphere lithography (NSL) combined with reactive ion etching (RIE). By changing the size of the seed polystyrene nanosphere with fixed thickness of Si…
Low-temperature scanning tunneling microscopy has been employed to analyze the formation of quantum well states (QWS) in two-dimensional gold islands, containing between 50 and 200 atoms, on MgO thin films. The energy position and symmetry of the eigenstates are revealed from conductance spectroscopy and imaging. The…
We study the continuum limit of a family of kinetic Monte Carlo models of crystal surface relaxation that includes both the solid-on-solid and discrete Gaussian models. With computational experiments and theoretical arguments we are able to derive several partial differential equation limits identified (or nearly iden…
3-Oxo-acyl-acyl carrier protein (ACP) reductase (FabG) plays a key role in the bacterial fatty acid synthesis II system in pathogenic microorganisms, which has been recognized as a potential drug target. FabG catalyzes reduction of a 3-oxo-acyl-ACP intermediate during the elongation cycle of fatty acid biosynthesis. H…
Total electron-scattering cross sections of pyrimidine, the basic component for the nucleic bases cytosine and thymine, were measured for electron energies from 5 eV to 1 keV using the linear transmission method. The measured results were compared to semiempirical data obtained by means of the additivity rule and to e…
A microwave-assisted ball milling process was used for low temperature synthesis of MgFe 2 O 4 nanoparticles with high saturation magnetization. Four comparitive experiments, including boiling water assisted ball milling, microwave irradiation, regular ball milling, and microwave/ball milling alternative treatment, we…
Roughening in the electronic growth of Ag films on Si(111)-(7×7) surfaces for a film thickness ranging from 1 to 30 monolayers is reported. Ag films exhibit the growth of flat-top plateaus of preferential heights due quantum electronic effect. We have observed roughening of the film growth due to instability with line…
Using the measured Capacitance-Voltage and Current-Voltage characteristics of the rectangular AlN/GaN Heterostructure Field-Effect Transistors (HFETs) with different Schottky areas, we found that after device processing the polarization Coulomb field (PCF) scattering is induced and has an important influence on the tw…
We simulate resistance distributions of multilevel oxide bipolar resistive random access memories (ReRAMs) through a physical model with Monte Carlo method. The model is used to explain frequently noticed proportionality relationship between distributions of resistances and multi-levels program voltages. By comparing…
Development of highly efficient thin film solar cells involves band gap engineering by tuning their elemental composition with depth. Here we show that grazing incidence X-ray fluorescence (GIXRF) analysis using monochromatic synchrotron radiation and well-characterized instrumentation is suitable for a non-destructiv…
In this study, a drift-diffusion model is used to derive the current-voltage curves of an organic bilayer solar cell consisting of slabs of electron acceptor and electron donor materials sandwiched together between current collectors. A simplified version of the standard drift-diffusion equations is employed in which…
Sputtering depends on the local surface curvature; it is higher for convex and lower for concave surfaces than for a flat reference target. We analyze this dependence theoretically and show that the sputter yield primarily depends on a dimension-free curvature parameter, and second on the relative variance of the depo…
This paper investigates the opportunities of lightweighting a steel ladder frame, which is a primary structural component in a body-on-frame vehicle, using a carbon-fibre-reinforced polymer (CFRP) composite. The finite element (FE) model of a 2007 Chevrolet Silverado, which is a body-on-frame pickup truck, is selected…
The thermal chemistry of tetrakis[Cu(I)- N - sec -butyl-iminopyrrolidinate] and bis[Cu(I)- N,N -dimethyl- N ′,N ″-di- iso -propyl-guanidinate], promising precursor for atomic layer deposition (ALD) applications, was investigated on a Ni(110) single-crystal under ultrahigh vacuum (UHV) conditions by using X-ray photoel…