Materials Literature
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Constructs intended for bone tissue engineering are influenced by the initial cell seeding procedure. The seeding method should be rapid, convenient, improve cell spatial distribution, and have no negative effects on cellular viability and differentiation. This study aimed to compare the effect of short-run seeding me…
In this work, the authors studied the time response of solid-state nanopores to the applied potentials and the corresponding capacitances. They primarily examined the effect of the doping of the silicon substrates as well as the addition of dielectrics above and below the device membrane. For simple silicon nitride me…
Carboxymethyl cellulose (CMC) is the most widely used co-binder and rheology modifier in paper coating. This work presents an investigation on the effects of CMC on coating structure development by measuring viscosity of the coating colors and by characterizing properties of the dried coatings. The results showed that…
n-Si single crystals produced by the floating zone method are studied. The concentration of electrons in the crystals is 6 × 1013 cm−3. The samples are irradiated with 25-MeV protons at 300 K. The irradiation dose is varied in the range (1.8–8.1) × 1012 cm−2. The measurements are carried out by means of the Hall techn…
Silicon nanowire (Si NW) arrays were fabricated on polished and pyramids textured mono-crystalline Si (mc-Si) using an aqueous chemical etching method. The Si NWs and a hybrid texture of NWs and pyramids both show strong anti-reflectance properties in the wavelength region of 300–1000 nm, with the minimum average refl…
The issue of variable bandgap values for InN films grown on c-sapphire has been addressed in this work. α-InN films have been deposited in nitrogen rich condition at different substrate temperatures on bare Al2O3 (0001) by plasma assisted molecular beam epitaxy (PA-MBE). The results of several complementary characteri…
The aim of bone replacement or fracture treatment methodologies is to induce tissue regeneration respecting anatomy and try to recover functionality. This goal was initially achieved in the 17th century by using animal or human grafts and several medical devices made of natural and synthetic materials are currently us…
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We have carried out X-ray diffraction and Mössbauer spectroscopy measurements on the spinel phase g-Fe 2 SiO 4 (ringwoodite) at ambient temperature and pressures up to 66 GPa using diamond anvil cells. At pressures above 30 GPa, a previously unknown structural phase transition to a rhombohedrally distorted spinel phas…
Permanent Magnet (PM) machines with concentrated windings are cost effective, compact and highly efficient. The application of such machines in large Direct Drive (DD) wind turbines can be advantageous. However, these machines have the problem of eddy current losses in solid parts like magnets and rotor back-iron. Apa…
Standard NiAu/SAC (SnAgCu) solder bumps are compared with Cu pillar bumps in terms of their electromigration behavior. Both bump configurations are flip chipped onto package substrates with a thick Cu finish. The Cu pillar bumps, which are soldered with a thin SnAg cap, outperform the standard solder flip chip bumps d…
This paper investigates the current density singularity in electromigration of solder bumps. A theoretical analysis is performed on a homogenous wedge with arbitrary apex angle, 2(π-θ0), when the current flow passes through. A potential difference is applied at a distance far away from the tip of the wedge. It is foun…
The high speed drives are much interested in the industrial applications due to the compact size and high efficiency. This paper presents a torque control scheme using modified TSF(Torque Sharing Function) for the high speed SRM (Switched Reluctance Motor). Because of a short commutating duration in a high speed regio…
Gold ruthenium (AuRu) nanoparticles were modified by single strand DNA (ssDNA) to prepare an aptamer AuRu nanoprobe (AuRussDNA) for Hg2+. The nanoprobe reacted with Hg2+ to form double-stranded T-Hg2+-T mismatches, and the released AuRu nanoparticles aggregated to big particles, which induced an increase in the resona…
The electric field strength of interface dipoles cannot be measured directly but can be derived from measurable electronic properties such as the valence band offset (VBO) and electron affinity using photoemission techniques. In this study, we found that the measurements of these two values are affected by differentia…
A new criterion has been recently proposed combining the topological instability (λ criterion) and the average electronegativity difference (Δe) among the elements of an alloy to predict and select new glass-forming compositions. In the present work, this criterion (λ.Δe) is applied to the Al-Ni-La and Al-Ni-Gd ternar…
A combined XPS, NEXAFS, and ToF-SIMS chemical surface characterization of carbohydrate-functionalized gold and glass surfaces is presented. Spot shape and chemical composition across a spot surface are provided by surface-sensitive methods as ToF-SIMS and XPS, used in their imaging modes. Moreover, the feasibility of…
Stable nitroxyl radicals are important tools in chemistry, biophysics, biology, and materials science. Their stability and the sensitivity of their EPR spectra to the local environment make them valuable molecular probes. This review seeks to give an overview of the developments in the field of nitroxide spin probes a…
Future 3-D applications require a very low pitch for inter-strata vertical interconnection. The last International Technology Roadmap for Semiconductors (ITRS) assessment for vertical interconnection predicts a need for decreasing the interconnection pitch to 10μm. The room-temperature insertion technology has been pr…
A 1.2 MV∕50 mA symmetrical Cockcroft-Walton (SCW) power supply of over 83% power efficiency, driven by 50 Hz frequency, was developed for an industrial electron beam irradiator. It is constructed by capacitors of 45 nF and 28.13 nF in the coupling column and capacitors of 18.75 nF in the smoothing column. Working stat…