Materials Literature
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Abstract Thermal and viscoelastic properties of composites of polypropylene (PP) filled with 0–8 vol % of vapor grown platelet carbon nanofibers (PCNF) were investigated. High shear mixing was used to disperse and distribute the nanofibers. Scanning electron microscope (SEM) was used to study the morphology of the com…
Abstract Conducting polymers bearing nitro substituents are very important from both academic and industrial viewpoints. However, it is very difficult to electrosynthesize such conducting polymers because of the strong electron‐withdrawing effect of nitro groups. In this article, we describe the electrochemical synthe…
A density functional calculation of a Ag (111)/ZnO (0001) interface with 30° rotated epitaxy reveals that the strength of the interface, as determined from the work of separation, is significantly lowered by the presence of hydrogen. This interface has been observed in magnetron sputtered thin-film systems and could b…
We have investigated the magnetic properties of Ni2+ exchanged NaY zeolite by using a direct current magnetization technique. At T>5 K, the M vs H/T curves superimpose and these curves could be fitted well using a Langevin function with a log-normal distribution of moments. The mean spin-cluster moment has been…
Porphyrazine III has been synthesized on a large scale (18.4 g), with minimal chromatographic purification by employing a novel one-pot, 3-step sequence. Two dinitrile precursors I and II, the latter of which consisted of a mixture of geometric isomers, were transformed, via the corresponding pyrroline diimines, into…
The vibrational modes of acoustic phonons and the corresponding eigenfrequencies in $\mathrm{Cd}\mathrm{Se}∕\mathrm{Cd}\mathrm{S}$ core/shell nanocrystals and $\mathrm{Cd}\mathrm{S}∕\mathrm{Cd}\mathrm{Se}∕\mathrm{Cd}\mathrm{S}$ quantum-dot quantum wells (QDQWs) are obtained by adopting their corresponding continuum mo…
We have investigated the spontaneous magnetization exhibited in Nd 0.5 Ca x Sr 0.5− x MnO 3 ( x = 0.1, 0.2, 0.3 and 0.4) (NCSMO) samples by measurements of magnetization and electron spin resonance. As like end members, the samples crystallize in an orthorhombic structure with Imma ( x = 0.1) and Pnma (0.2, 0.3 and 0.…
Abstract A mathematical expression describing the growth regime of multilayers formed layer by layer and the correlation between the nature of the growth process and the distribution of the charges in the polyelectrolyte deposited on the surface of the film is reported. Two typical polyelectrolyte pairs were chosen su…
Silica glasses containing blue/green/red luminescent nanocrystalline silicon (nc-Si) particles that consist of monolayer and/or three-layer structures were fabricated by a radio-frequency sputtering technique and postannealing treatment. These silica glasses showed very broad luminescence spectra with a peak at 460 nm…
A new photochromic colorant with an oxazabicyclic moiety has been synthesized by an efficient method. It turns pale red upon UV irradiation and undergoes reverse reaction while being heated. This work may open an exciting new avenue for future development of the photochromic dyes with novel molecular structures.
The photoalignment of a nematic fluid, E-7, and a glassy-nematic oligofluorene, F(MB)5, was investigated on films of Polymers 1 and 2 in the parallel regime. Polarized absorption spectroscopy and computational chemistry were employed to characterize coumarin monomer's and dimer's molar extinction coefficients and to l…
Traditionally, the lognormal distribution has been used to analyze electromigration (EM) failure data for both Al- and Cu-based interconnect technologies. However, from a statistical perspective, the lognormal distribution is found to be inappropriate for submicron interconnects because their resistance degradation pr…
By dynamic forging during Spark Plasma Sintering (SPS), grain-orientated ferroelectric Bi3.25La0.75Ti3O12 (BLT) ceramics were prepared. Their ferroelectric, piezoelectric, and dielectric properties are anisotropic. The textured ceramics parallel and perpendicular to the shear flow directions have similar thermal depol…
In this article, a fundamental model was postulated to capture the influences of microfabrication characteristics on the frictional behavior of pressure-driven liquid microflows through a detailed analysis of the underlined surface effects that effectively link up these two strongly correlated aspects. For theoretical…
The transport properties of as-deposited and rapid thermal annealed phosphorus-doped ZnO films grown by pulsed laser deposition are reported. As-grown ZnO:P samples showed n-type characteristics, presumably due to the formation of antisite PZn defects. Rapid thermal annealing yielded a carrier-type conversion from n-…
We have addressed two issues concerning the relative stabilities of various orienta- tions of interstitial clusters in iron by making a comprehensive comparison between four recent empirical potentials. First, we have investigated the effect of finite temperature on the com- petition between clusters made of a few dum…
Zn 1 − x Mn x O nanoparticles synthesized by a combustion method with Mn concentration x up to 0.40 are carefully characterized by means of x-ray powder diffraction and high resolution transmission electron microscopy. Single-phase solid solution Zn1−xMnxO is achieved with a solubility limit of ∼30 at. % Mn. An almost…
Identifying and understanding the vibrational frequency shifts caused by electron addition to metal phthalocyanine (MPc) molecules is the main goal of the present work. Among other things, it should be useful in establishing the amount of charge-transfer level recently reported in potassium doped solid MPc films. Choo…
Pulsed laser deposition (PLD) of a sintered boron carbide (B4C) target has been used for depositing crystalline thin films on room-temperature substrates of (100) oriented silicon surfaces. Deposition was accomplished by positioning the substrates parallel (on-axis geometry) to a rotating target or perpendicular (off-…
Nanosized ZnO films were prepared by sol-gel process on quartz substrates. The effects of sol concentration and annealing temperature on the surface morphology, microstructure and optical properties of the films were investigated. The results show that the sols remain stable and usable for spin-coating within 7 d. The…