Materials Literature
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The effects of the electromigration-induced stress gradient and temperature gradient on the void evolution in interconnect are examined by numerical simulation. It is found that the void in a stress gradient field will move to higher stress zone, regardless of tensile stress or compressive stress. The void motion driv…
The microstructures and mechanical properties of continuous porous SiC–Si 3 N 4 composites fabricated by multi‐pass extrusion were investigated, depending on the amount of Si powder added. Si powder with different weight percentages (0%, 5%, 10%, 15%, 20%) was added to SiC powder to make raw mixture powders, with 6 wt…
Current–voltage characteristics of ballistic carbon-nanotube field-effect transistors are characterized with an iterative simulation program. The influence of carbon-nanotube chirality and diameter on the output current is considered. An analytical current–voltage expression under the quantum capacitance limit and low…
We report that the composites of ZnO/porous Si (PS) can exhibit intensively white photoluminescence (PL) under proper excitation wavelength. The PS sample is formed by electrochemical anodization of n-type (111) silicon. ZnO films are then deposited on the PS surface by pulsed laser deposition (PLD). ZnO is transparen…
Dense machinable α‐SiAlON/BN composites were fabricated by hot‐pressing using turbostratic boron nitride (tBN) obtained from nitridation of melamine diborate. The tBN was added to the starting powders, or introduced as a coating that formed in situ on α‐Si 3 N 4 carrier powders during nitridation, and was subsequently…
Abstract Sn:ZnO thin films with different Sn concentrations were grown by pulsed laser deposition (PLD) onto single‐crystal Si(001) substrates at an oxygen pressure of 2 × 10 –2 mbar and substrate temperature of 600 °C. The targets used were high density Sn:ZnO pellets with different Sn concentrations produced by mixi…
Abstract Density functional calculations have been carried out to obtain the geometric and electronic structure of boron sheets and nanotubes. The buckled boron sheet formed by alternating up and down rows of B atoms, with a buckling height of 0.85 Å, is about 0.20 eV/B atom more stable than the corresponding atomical…
The concept of critical disclination strength (ωc) in HCP bicrystalline nanowires is developed on the basis of atomistic simulations using the modified embedded atom method. Disclinated titanium nanowires are created atomistically by combining two bicrystals with different misorientations along the tilt axis. Relaxati…
First-principles calculations are employed to study the surface relaxation and electronic structure of the fully relaxed SrTiO(3) (001) oxygen-vacancy surfaces with both Sr and Ti terminations. In contrast to the perfect surface, the larger surface rumples and smaller interlayer distances have been found. Some in-gap…
BiScO 3 –PbTiO 3 (BSPT) thin films near the morphotropic phase boundary were successfully fabricated on Pt(111)/Ti/SiO 2 /Si substrates via an aqueous sol–gel method. The thin films exhibited good crystalline quality and dense, uniform microstructures with an average grain size of 50 nm. The dielectric, ferroelectric,…
Abstract Silver nanoparticles were formed in situ along with poly(2,5‐dimethoxyaniline) (PDMA) in an interconnected network matrix (reactor), comprising the electronic conductive polymer, PDMA, and a polyelectrolyte, poly(styrene sulfonic acid) (PSS), through the simultaneous reduction of Ag + ions and polymerization…
The KxTiyNi1−x−yO system in the series AxTiyNi1−x−yO (A=Li, K, Na; x=0.05–0.30, y=0.02) shows the highest dielectric constant ε′∼105 and lowest loss. The high ε′ value is attributed to microstructures, which form boundary layer capacitors. Electrical conductivity in these materials follows small polaron hopping mechan…
Microstructure development in Bi 0.5 (Na 0.5 K 0.5 ) 0.5 TiO 3 prepared by a reactive‐templated grain growth process was dependent on the sizes of platelike Bi 4 Ti 3 O 12 (BiT) and equiaxed TiO 2 particles used as starting materials. Calcined compacts were composed of large, platelike template grains and small, equia…
Using the molecular dynamics method, the stability of small He-vacancy clusters is studied under the condition of the high He and low vacancy densities. The result shows that there is a competition between He atoms detrapped and self-interstitial atoms (SIAs) emitted during the clustering of He atoms. When the He numb…
A formulation of continuum mechanics within the context of general relativity is presented that allows for the incorporation of certain types of anelastic material behaviour, such as viscoelasticity and plasticity. The approach is based on the concept of a four-dimensional body-time complex structured as a principal b…
The arrangement of nanostructures into desired well-ordered architectures is crucial for the realization of functional nanodevices and has been the focus of current nanotechnology. Existing physical and chemical approaches have the ability to assemble nanostructures, but it is still a challenge to arrange basic nanost…
Mössbauer measurements at different temperatures are reported for MWCNTs with metallic encapsulations ("nanowires"). The spectra can reasonably be refined with two subpatterns: one providing clear evidence of an iron carbide Fe(3)C (cementite) phase as the main nanowire component and the other yielding a relaxation do…
Experimental studies of Ge nanocrystals embedded in SiO(2) films doped with Er and Yb deposited by rf-magnetron sputtering are presented. Although inter-band photoluminescence (PL) from the Ge nanocrystals is not observed, it is nevertheless found that the presence of Ge nanocrystals is crucial for obtaining light emi…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSynthesis of a High Molecular Weight Fluorinated Poly(phthalazinone ether) by Self-Condensation of an AB-Type MonomerXiuhua Li and Allan S. HayView Author Information Department of Chemistry, McGill University, Montreal, Quebec H3A…
We present a simple solvent-assisted capillary molding method to fabricate zinc oxide (ZnO) nanostructures using an ultraviolet (UV) curable polyurethane acrylate (PUA) mold. A thin film of the ZnO sol-gel precursor solution in methyl alcohol was prepared by spin coating on a solid substrate and subsequently a nanopat…