Materials Literature
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A new cold nanowelding technique for cetyltrimethylammonium bromide (CTAB)-stabilized colloidal nanorods in water is reported. This technique leads to the formation of micrometric nanowires by end-to-end self-organization and welding of nanorods. This cold welding strategy could be generally applicable to colloidal na…
Talc is a important filler for polypropylene (PP) and Non halogen flame retardants (ammonium polyphosphate) is used with PP. It does not generate toxic gases and corrosive smokes during combustion. The addition of flame retardants will lower the flammability of PP. Talc improves the mechanical properties (stiffness, f…
Multiferroic materials in which magnetism and ferroelectricity coexist are a time-honored subject of study, opening the route for the next generation of electronic devices. Understanding the pronounced interplay between these properties is a current challenge, especially for the realization of multiferroic devices. On…
We present a design of a square invisibility cloak based on triangular transformations. In triangular transformations, certain areas of the cloak are squeezed to be infinitesimal in the virtual space. This results in cloak materials whose constitutive parameters are singular. We show rigorously that these prescribed s…
ABSTRACT First, Friedel–Crafts reactions were used for the acylation process. For this, polystyrene (PS) was reacted with propionic anhydride in the presence of Lewis acid catalyst. The amount of acyl group linked PS as a result of acylation has been identified as volumetric. Second, the bromination and lithiation rea…
This study was carried out to compare mechanical and thermal properties of polypropylene (PP) reinforced with uncalcined and calcined zeolites. The PP samples were reinforced with zeolites at various quantities of 2, 4, and 6 (wt %). The comparison of the two types of zeolite was based on mechanical properties, includ…
Ein Wechsel der Orientierung bei Flüssigkristall(LC)-Mesogenen von homöotrop zu planar und die Bildung mikrophasengetrennter Domänen und einer Hautschicht an der Oberfläche ermöglichen eine effiziente Ausrichtung zylindrischer Domänen in einer Ebene. Mit dieser sehr einfachen Oberflächensegregationsstrategie sollte ei…
An alternative, and much more intuitive, approach is proposed to the rigidity of (relatively) strain‐free oxide glass networks, based on effectively rigid basic structural units and the true degrees of freedom that allow the formation of such networks; viz . bond torsion angles plus the bond angle at the bridging oxyg…
Using in situ x-ray scattering and synchrotron radiation, we have experimentally elucidated the mechanism of the cubic to monoclinic phase transition in the Zn6Sc 1/1 approximant to an icosahedral quasicrystal. The high-temperature cubic phase is described as a bcc packing of a large Tsai-type icosahedral cluster whos…
Thin films of rare earth (RE)-doped BiFeO3 (where RE=Sm, Ho, Pr and Nd) were grown on LaAlO3 substrates by using the pulsed laser deposition technique. All the films show a single phase of rhombohedral structure with space group R3c. The saturated magnetization in the Ho- and Sm-doped films is much larger than the val…
In order to develop high voltage (HV) insulation materials, epoxy/spherical alumina composites with two different particle sizes (in <TEX>${\mu}m$</TEX>) were prepared and a dynamic mechanical analysis (DMA) and electrical insulation breakdown strength test were carried out in sphere-sphere electrodes and the data wer…
We have previously reported enhancing the imaging of atherosclerotic plaques in mice using reconstituted high density lipoproteins (HDL) as nanocarriers for the MRI contrast agent gadolinium (Gd). This study focuses on the underlying mechanisms of Gd delivery to atherosclerotic plaques. HDL, LDL, and VLDL particles co…
We propose a cell structure for the fast switching of liquid crystals by the fringe field. By forming protrusion between patterned electrodes, we can obtain enhancement of response time. The protrusion reduces the effective cell gap, with which a fast response time can be realized. There is little decrease in the tran…
ABSTRACT In this article, we present an experimental design methodology for studying the effect of the draw ratio on the physical properties of nylon 6 fibers on hot multistage drawing. A response surface methodology involving D‐optimal design was used for the modeling and optimization. According to the analysis of va…
The existence of a dendritic box in polyphenylene dendrimers is demonstrated by isothermal titration calorimetry (ITC). The thermodynamic parameters of the uptake process of a variety of small guest molecules into the dendrimers are measured. ITC revealed that for dendrimers with an unpolar interior this process is ma…
Hohlkugeln in Leichtbauweise: Die Kombination der Zwillingspolymerisation mit harten Templaten macht Kohlenstoffhohlkugeln (KHK) mit maßgeschneiderten Eigenschaften zugänglich. Dabei können die Dicke und Porentextur der Schalen sowie der Durchmesser des Kugelhohlraumes gezielt eingestellt werden. Das Anwendungspotenzi…
Crystallization and phase transition behaviors of n-hexadecane (n-C16H34, abbreviated as C16) confined in microcapsules and n-alkane/SiO2 nanosphere composites have been investigated by the combination of differential scanning calorimetry (DSC) and temperature-dependent X-ray diffraction (XRD). As evident from the DSC…
The appearance of static magnetism, nanoscopically coexisting with superconductivity, is shown to be a general feature of optimally electron-doped $L$Fe${}_{1\ensuremath{-}x}$Ru${}_{x}$AsO${}_{1\ensuremath{-}y}$F${}_{y}$ superconductors ($L$ represents a lanthanide ion) upon isovalent substitution of Fe by Ru. The mag…
The polypropylene‐polyhedral oligomeric silsesquioxane (PP‐POSS) organic–inorganic hybrids were obtained and studied. The hybrids were prepared by grafting of POSS on PP chains during a reactive melt‐blending of polypropylene (iPP), maleic anhydride functionalized PP (PP‐ g ‐MA), and amine‐functionalized POSS (aminopr…
Poly(2,6-diaminopyridine) (PDAP) was synthesized by interface polymerization, a process in which the solid (NH 4 ) 2 S 2 O 8 was added quickly into a solution containing 2,6-diaminopyridine of equal molar fraction. The morphology of the PDAP prepared in this manner consists of spherical microparticles with an average…