Materials Literature
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A continuum model for the transport phenomena in solidification systems is used to investigate the formation of macrosegregation in a 360 t multiconcentration poured steel ingot. A numerical scheme with explicit time stepping in solidification problems is employed to solve coupled temperature and concentration fields,…
Electrospinning has been recognised as an efficient technique for the fabrication of continuous nanofibres. In the present paper, an approach to producing nanoporous materials by electrospinning was discussed, and a general strategy for the synthesis of nanoporous materials by electrospinning was suggested. The number…
With the aid of ab initio, parameter free calculations based on density-functional and many-body perturbation theory, we investigate the electronic band structure and electron affinity of diamond surfaces. We focus on clean, ideal (0 0 1) and (1 1 1) surfaces and on the effect of hydrogen adsorption. Also single sheet…
The synthesis of two chiral amphiphiles and their self-assembling features in solution and onto surfaces is reported. The different degree of interdigitation of the paraffinic substituents has an enormous influence in the chirality of the aggregates. Thus, while oligo(phenylene ethynylene) 1 shows a bisignated Cotton…
Carbon nanotubes rank amongst potential candidates for a new family of nanoscopic devices, in particular for sensing applications. At the same time that defects in carbon nanotubes act as binding sites for foreign species, our current level of control over the fabrication process does not allow one to specifically cho…
We calculate electronic structures of a high-${T}_{c}$ iron-based superconductor ${\text{Sr}}_{2}{\text{VFeAsO}}_{3}$ by local-density approximation (LDA) plus $U$ method. We assume a checkerboard antiferromagnetic order on its blocking layers including vanadium and strong correlation in $d$ orbits of vanadium through…
In this paper we have carefully investigated the structural and physical properties of the ${\text{SmFe}}_{1\ensuremath{-}x}{\text{Ir}}_{x}\text{AsO}$ solid solution $(0\ensuremath{\le}x\ensuremath{\le}0.275)$, chosen as a case study, by means of synchrotron x-ray diffraction, Raman spectroscopy, and magnetization mea…
Abstract We study the optical and magnetic properties of quasi one‐dimensional dilute magnetic Zn1−xMnxS and antiferromagnetic (AF) MnS as a function of size, Mn content x, and sample morphology. On the one hand, we discuss the temporal dynamics of the yellow Mn‐related luminescence of the samples under resonant excit…
Materials with A2B2O7 (pyrochlore) structure have received significant attention for their applications as new protonic conductors and materials used in electronic devices. One of the unique synthesis routes for La2Zr2O7 (pyrochlore) powders is the glycine–nitrate combustion method, which shows superior properties of…
A new pathway by means of transetherification has been developed to synthesize novel unsymmetrical 2,3,9,10,16,17,23-heptakis(alkoxyl)-24-mono(dimethylaminoalkoxyl)phthalocyanine compounds. Cyclic tetramerization of 4,5-di(alkoxyl)phthalonitrile in refluxing dimethylamino-alcohol with high boiling point such as dimeth…
An acid-catalyzed polymerization of tribenzylborate (TBB) is described for the synthesis of soluble poly(phenylene methylene) (PPM). The polymerization proceeds via carbocationic mechanism with first-order kinetics with respect to TBB and 0.7th order with respect to acid concentration. The structure of PPM was charact…
The chain and the crystal unit cell orientation of linear low density polyethylene (LLDPE) were measured with near edge X-ray absorption fine structure (NEXAFS) spectroscopy. A strongly attractive substrate, silicon, and a weakly attractive substrate, mica, were used. For a 100 nm thick LLDPE film on the silicon subst…
In cases relating to minors (persons under 18), court approval is necessary for any settlement once proceedings are instituted. Reimbursement to the State of some of the benefits paid to the plaintiff as a consequence of the accident is made by the compensator (the defendant) to the Compensation Recovery Unit. This sy…
Abstract A new tricyanate ester monomer of a tris(4‐hydroxyphenyl)benzene derivative was synthesized in 6‐steps with a 63% overall yield. The geminal substitution of phenyl rings on ethane, in addition to the creation of a racemic/diastereomeric mixture, resulted in a liquid monomer whereas compounds with similar stru…
Abstract BaTiO3 (BTO) thin films of 100 nm were grown on Si substrates buffered with LaNiO3 (LNO) layers with various thicknesses. X‐ray diffraction and strain analysis demonstrate that the BTO film grown on the LNO of 600 nm is in an in‐plane compressive strain state. The remnant polarization of 10.2 µC/cm2 obtained…
Abnormal protein aggregates, so called amyloid fibrils, are mainly known as pathological hallmarks of a wide range of diseases, but in addition these robust well-ordered self-assembled natural nanostructures can also be utilized for creating distinct nanomaterials for bioelectronic devices. However, current methods fo…
Abstract The poly(3‐hydroxbutyrate‐co‐3‐hydroxyvalerate)/poly(ε‐caprolactone) block copolymers (PHCLs) with three different weight ratios of PCL blocks (38%, named PHCL‐38; 53%, named PHCL‐53; and 60%, named PHCL‐60) were synthesized by using PHBV with two hydroxyl end groups to initiate ring‐opening polymerization of…
Reel them in: Wavelength-resolved movies of the centrifugal fractionation of a single-walled carbon nanotube dispersion (see picture) are used to obtain the composition and absorption profiles of all fractions even in a complex dispersion, where nanotubes have been efficiently solubilized by an intercalant–surfactant…
Successful implantation of any biomaterial depends on its mechanical, architectural, and surface properties. Materials with good bulk properties seldom possess the appropriate surface characteristics required for good biointegration. The present study investigates the results of surface modification of a highly porous…
Magnetic measurements on optimally doped single crystals of ${\text{BaFe}}_{2}{({\text{As}}_{1\ensuremath{-}x}{\text{P}}_{x})}_{2}$ $(x\ensuremath{\approx}0.35)$ with magnetic fields applied along different crystallographic axes were performed under pressure, enabling the pressure evolution of coherence lengths and th…