Materials Literature
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A series of Co-doped ZnO thin films were prepared under various deposition conditions using the pulsed laser deposition method. X-ray photoelectron spectroscopy (XPS) and XPS depth profiling were used to detect the elemental valence states of Zn, Co and O. It was found that the films deposited under low temperature an…
The piezoelectric, dielectric, and ferroelectric properties of the (LiCe) co-substituted calcium bismuth niobate (CaBi 2 Nb 2 O 9 , CBNO) are investigated. The piezoelectric properties of CBNO ceramics are significantly enhanced and the dielectric loss tan δ decreased. This makes poling using (LiCe) co-substitution ea…
Coarse graining procedures are intended to well reproduce the structure of a material while increasing the simulations efficiency. However, the dynamics usually accelerates with coarse graining and a scaling procedure has to be used for dynamical data calculations. Most often a simple time-scaling coefficient is used…
This paper presents a study wherein the Laser Sintering (LS) process is used to perform additive manufacturing of zirconium diboride (ZrB2) parts. Experiments were conducted to determine values of LS process parameters (laser power, scan speed, energy density, line spacing, and layer thickness) that can be used to imp…
The poor bioavailability and therapeutic response exhibited by conventional eye drops due to rapid precorneal elimination of the drug may be overcome by the use of an in situ gelling systems that are instilled as drops into the eye and undergo a sol-to-gel transition in the cul-de-sac which improves patient compliance…
Nanocomposite fibers based on multi-walled carbon nanotubes (MWCNT) and poly(lactic acid) (PLA) were prepared by solution blow spinning (SBS). Fiber morphology was characterized by scanning electron microscopy (SEM) and optical microscopy (OM). Electrical, thermal, surface and crystalline properties of the spun fibers…
An oscillating bubble near another (stationary) bubble can give rise to interesting interactions. Such a nonequilibrium (oscillating) bubble can create a jet in a smaller nearby (initially stationary) bubble as demonstrated in this study both experimentally and numerically. In the experimental study, a spark-generated…
AC (alternative current) resistivity measurement results on Mn-Zn sintered ferrite were analyzed in the 0.1–500 MHz range. From electrical point of view, the material could be represented by an equivalent circuit of parallel resistance-capacitance cells connected in series corresponding to the contributions from bulk…
La(Fe,Si)13 alloys display a giant magnetocaloric effect when a magnetic field is applied near the Curie temperature TC. However, to use these alloys for domestic refrigeration based on magnetic cooling, it is vital to increase TC near to the room-temperature range while simultaneously maintaining a large magnetocalor…
Polyethylene terephthalate (PET) was depolymerized using trimethylolpropane (TMP) and glycerin as a binary solvent mixture to provide oligomeric polyol for rigid polyurethanes foam formulation. Recyclate containing rigid polyurethane foam nanocomposites were prepared by introducing of different portions (1-5%) of nano…
Theoretical methods are critical to our understanding of defect formation in block copolymer lithography processes. We have previously applied self-consistent field theory (SCFT) to study the energetics of dislocation and disclination defects prevalent in graphoepitaxy of "standing up" lamellae, and present results of…
The mechanical properties of nanocrystalline Ni–18.75 at. % Fe alloy (average grain size ∼ 22 nm) were studied under uniaxial compression in the temperature range of 4.2–350 K. During deformation with a constant rate the temperature dependence of yield stress was registered and deformation curves were analyzed. Temper…
We propose a generalization of the two-dimensional eikonal-limit cloak derived from a conformal transformation to three dimensions. The proposed cloak is a spherical shell composed of only isotropic media; it operates in the transmission mode and requires no mirror or ground plane. Unlike the well-known omnidirectiona…
Nanotubes of type (n,n) are called armchair nanotubes because of their “W” shape, which is perpendicular to the tube axis. One primary armchair nanotube is the SWCNT(5,5)-armchair. To establish a good structural relationship between the structure of molecules [SWCNT(5,5)-Armchair-CnH20] (n=20-190) 1-18, the number of…
We investigate the effect of various ferroelectric parameters, such as the doping density, the permittivity, and the thickness, on ferroelectric diodes based on the proposed self-consistent numerical model. Our calculations clarify the dependence of the band diagrams, the charge density distributions, and the I–V curv…
SrTiO3 (STO) thin films were grown onto Pt/Ti/TiO2/SiO2/Si and bare Si substrates via metallo-organic solution deposition (MOSD). X ray diffraction, scanning electron microscopy, atomic force microscopy, spectroscopic ellipsometry (SE), and dielectric/insulating measurements were utilized to characterize the STO thin…
Using a primitive water model, we find that the strength of tetrahedral interactions can change the behavior of liquid water from the liquid-liquid critical point scenario to the singularity-free scenario. Specifically, we find that the strongly tetrahedral model has a liquid-liquid critical point from which the Widom…
Electrically conducting nanocomposites were prepared by melt mixing process using high density polyethylene (HDPE) with 20 wt.% of carbon black (CB) and 0–1 wt.% of multiwalled carbon nanotubes (MWNTs). The effects of MWNTs in HDPE-CB-MWNTs composites were examined using X-ray diffraction and differential scanning cal…
ZnS nanoparticles were synthesized via a simple surfactant free microwave route. In this synthesis, thioacetamide was used as sulfur source. The effects of different parameters such as type of zinc precursor, time and power of irradiation on the morphology and particle size of the products have been investigated. The…
We report on a contact hole shrink process using directed self-assembly. A diblock copolymer, poly (styrene-blockmethyl methacrylate) (PS-<i>b</i>-PMMA), is used to shrink contact holes. Contact hole guide patterns for graphoepitaxy are formed by ArF photoresists. Cylindrical domains of PMMA is removed using organic s…