Materials Literature
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In many polycrystalline piezoelectric ceramics, domain switching during the poling process leads to the development of a macroscopic polarization and piezoelectric behavior. Traditionally, poling involves the application of electric fields across two parallel electrodes. In the present work, a radial mechanical compre…
The wetting properties of polypropylene (PP) surfaces were modified by adjusting the dimensions of the surface nanostructure. The nanostructures were generated by injection molding with nanoporous anodized aluminum oxide (AAO) as the mold insert. Atomic layer deposition (ALD) of molybdenum nitride film was used to con…
Biaxial creep tests were performed on fine-grained Ti–3Al–2.5V tubing at 823 and 873 K in the stress range σ/E = 1.7 × 10−4 to σ/E = 5.9 × 10−4. Subsequently, the creep data were analysed to determine the stress exponent and activation energy. A stress exponent value of 1 and an activation energy equal to that for gra…
A resonant x-ray magnetic diffraction study was performed for pure and (Cd,Ga)-doped $\mathrm{Gd}{\mathrm{In}}_{3}$ single crystals with cubic structure. All studied samples show an equal-magnitude antiferromagnetic spin structure with propagation vector $\stackrel{P\vec}{\ensuremath{\tau}}=[\frac{1}{2},\frac{1}{2},0]…
In order to separate and characterize some grades of paraffin waxes from El-Ameria crude waxes (slack waxes), a one-stage fractional crystallization technique has been done to separate the paraffin waxes with different characteristics by using different solvents and solvent mixtures at ambient temperature of 20°C and…
We study the statistical properties of peculiar responses in glassy systems at mesoscopic scales based on a class of mean-field spin-glass models which exhibit one step replica symmetry breaking. Under variation of a generic external field, a finite-sized sample of such a system exhibits a series of stepwise responses…
"Here, the world's most active and productive computational scientists from academia and industry present established, effective and powerful tools for understanding catalysts. With its broad scope - nitrogen fixation, polymerization, C-H bond activation, oxidations, biocatalysis and much more - this book represents a…
We report methods for the acquisition and analysis of optical images formed by thin films of twisted nematic liquid crystals (LCs) placed into contact with surfaces patterned with bio/chemical functionality relevant to surface-based assays. The methods are simple to implement and are shown to provide easily interprete…
In this study we examine the release profile of bovine serum albumin (BSA) from a porous polymer matrix derived from a co-continuous polymer blend. The porosity is generated through the selective extraction of one of the continuous phases. This is the first study to examine the approach of using morphologically tailor…
In response to increasing interest in the area of subdiffraction-limited near-field imaging, the performance of several different realizable and theoretical superresolving silver-based lenses is simulated for a variety of different input object profiles. A computationally-efficient T-matrix technique is used to model…
4,5-Bis(benzylthio)-3,6-diethylphthalonitrile (1) was mixed with 4 -t-butylphthalonitrile and then treated with lithium alkoxide in n-hexanol to produce the corresponding unsymmetrically substituted phthalocyanines (2) and (3) with two or four benzylthio groups, respectively. Treatment of phthalocyanine (2) with nicke…
Purpose This paper seeks to study the corrosion rate (CR) of Al 6063 in aqueous solutions containing food additives, namely ascorbic, citric and tartaric acids with/without chloride ions. Design/methodology/approach Chemical and electrochemical measurements were used to study the CR of Al 6063 in aerated aqueous solut…
Reaction of a (PNP)Ni radical with NO finishes in the time of mixing to form a 1:1 adduct with a NO stretching frequency of 1654 cm (-1). NMR data of this diamagnetic product indicate C 2 v symmetry, which is contradicted by the X-ray structure, which shows it to be nonplanar at Ni, with a geometry intermediate betwee…
The crystal structure of magnesium astrophyllite, ideally K 2 Na [Fe 4 Mg 2 Na] [5] Ti 2 Si 8 O 26 (OH) 4 , is monoclinic, sp. gr. C 2/ m , a = 5.3327(2), b = 23.1535(9), c = 10.3775(4) A, β = 99.615(1)°, V = 1263.3(1) A 3 , Z = 2, D calc . 3.158 g cm −3 from Mt. Yukspor, Khibina alkaline massif, Kola Peninsula, Russi…
Structural study with synchrotron X‐ray diffractometry was made on phase separation phenomena in 2, 3, and 4 mol% Y 2 O 3 ‐stabilized tetragonal ZrO 2 polycrystal (abbreviated as 2, 3, and 4Y‐TZP, respectively). The sintered body of 3Y and 4Y‐TZP underwent phase separation into high and low yttrium regions as sinterin…
A highly efficient, carbon-free rice husk ash (RHA) has been successfully used as a catalyst in oxalic acid (OA) decomposition by combining with ozonation at pH 3. The catalyst was characterized using various analytical techniques. X-ray fluorescence (XRF) analysis showed that RHA catalyst contains SiO 2 as a major co…
A series of polyhedral oligosilsesquioxane (POSS) nanosensors functionalized with fluorophores that change their wavelength of emission in response to their chemical environment has been synthesized and characterized by IR, NMR, UV, one- and two-dimensional fluorescence spectroscopy, MALDI-TOF MS, and electrospray MS.…
Woven cloths of Nextel ™ 610 and 720 fibers were coated with monazite by precipitation. The cloths were first saturated with concentrated precursor solutions, and then submerged in warm water to initiate precipitation onto the fiber surfaces. Coatings were characterized by scanning electron microscopy, and transmissio…
Time-resolved scanning tunneling microscopy (STM) is used to investigate a massive sulfur-induced transformation of a homogeneous array of approximately 2 nm Co nanoparticles into a new cobalt sulfide phase. The underlying atomistic mass-transport process is revealed and, surprisingly, found to be mediated exclusively…
Microstructural study of as-grown Ti4AlN3 MAX phase has been performed by transmission electron microscopy. Dislocation walls, dislocation nucleation sites and stacking faults are described. In particular, diffraction contrast analysis combined with high-resolution images give a new insight into the nature of the stac…