Materials Literature
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Five new soluble conjugated polymers are described, which were prepared upon Suzuki polycondensation reactions. They alternately consist of dialkylated 1,4-diketo-3,6-diphenyl-pyrrolo[3,4- c ]pyrrole ( DPP ) units and carbazole, triphenylamine, benzo[2,1,3]thiadiazole, anthracene, and fluorene units. The polymers were…
Synergistic effect between multi-walled carbon nanotubes (MWNTs) and clay on improving the flame retardancy of acrylonitrile–butadiene–styrene (ABS) resin was studied. Flammability properties measured by a cone calorimeter revealed that incorporation of clay and MWNTs into ABS resin significantly reduced the peak heat…
Novel metallomesogens with luminescent properties and liquid crystalline behavior at room temperature have been achieved by the preparation of zinc complexes with polycatenar pyrazole and bis(pyrazolyl)methane ligands. Their molecular structures do not have a conventional shape in that they are far from the typical ro…
Bicolor oxide superlattices with one- and two-unit-cell layer thickness (see figure) are explored by advanced synthesis, characterization, and first-principles calculation. Experimentally, enhanced ferroelectric polarization is observed for the superlattice of which chemical composition lies beyond the solubility limi…
A theory of scattering of massive chiral fermions in bilayer graphene by radial symmetric potential is developed. It is shown that in the case when the electron wavelength is much larger than the radius of the potential the scattering cross section is proportional to the electron wavelength. This leads to the mobility…
The characterization of Electric Arc Furnace (EAF) dust shows that bubble burst at the liquid steel surface is the principal source of dust emission. We have therefore developed an experimental device for studying this phenomenon. As in the case of the air-water system, the bubble-burst gives birth to two types of dro…
Surfaces that respond to multiple stimuli may be well-suited for drug delivery applications. Here, such a surface is prepared by coating a silicon wafer with a block copolymer comprising a pH/glucose- and a temperature-sensitive block. The figure shows how the multiresponsive surfaces work in response to glucose conce…
Silicon nanocrystal inks are produced with an integrated nonthermal plasma approach for the synthesis of monodisperse silicon nanocrystals and their surface functionalization with organic ligands. Plasma-functionalized silicon nanocrystals readily form stable colloidal solutions in nonpolar solvents, while non-functio…
The simultaneous measurement of structural and chemical information at the atomic scale provides fundamental insights into the connection between form and function in materials science and nanotechnology. We demonstrate structural and chemical mapping in Bi(0.5) Sr(0.5) MnO3 using an aberration-corrected scanning tran…
We investigate graphene and graphene layers on different substrates by monochromatic and white-light confocal Rayleigh scattering microscopy. The image contrast depends sensitively on the dielectric properties of the sample as well as the substrate geometry and can be described quantitatively using the complex refract…
Abstract The current status of research on boron nitride nanotubes (BNNTs)—carbon nanotube structural analogues—is discussed. Latest achievements in BNNT synthesis, morphology, and atomic structure analysis as well as physical, chemical, and functional property evaluations are reviewed. Similarities and differences be…
We consider the relationship between the spontaneous radiative decay of an atom at rest and of an atom moving with a constant velocity. Based on the relativistic form, Aμjμ, of the field–current interaction we analyse two situations. In the first of them the radiative decay of a single atom is considered by using two…
Abstract Previous theoretical work indicates that carbon nanotubes (CNTs) may, like C 60 and C 60 F x , act as transfer dopants for diamond; that is, they are capable of extracting electrons from a hydrogen‐terminated diamond substrate, effectively doping the near‐surface region of the diamond p‐type. In the present s…
Este trabalho teve como objetivo o estudo da resistência à compressão e flexão de painéis de cimento-madeira utilizando farinha de madeira de Pinus spp. com granulometria controlada proveniente de reaproveitamento do rejeito de indústrias madeireiras. O material, na forma de pequenas partículas (pó), com dimensões men…
Abstract The widespread application of collagen warrants studies on the effects of ultraviolet (UV) radiation on stabilized collagen. The negative impact of UV radiation is well known. Because collagen is used as a biomaterial in various biomedical applications, knowing the effects of UV irradiation on stabilized coll…
The solubilities of irbesartan (form A) in ethanol, acetone, chloroform, dioxane, and tetrahydrofuran between 278 K and 323 K are measured by a synthetic method. A laser technique is used to determine the disappearance of undissolved solute particles. Results are correlated by a semiempirical equation, the calculated…
Two pure hydrated sodium borates, α-Na 2 B 5 O 8 (OH)·2H 2 O and β-Na 2 B 5 O 8 (OH)·2H 2 O, have been synthesized under mild hydrothermal conditions and characterized by X-ray diffraction, infrared spectral, and thermogravimetric analysis and chemical analysis. The molar enthalpies of solution of α-Na 2 B 5 O 8 (OH)·…
Abstract The influence of shear flow on the crystallization of polyamide 6/MMT nanocomposites prepared by melt intercalation process was investigated in detail by differential scanning calorimetry. The melted nanocomposites were controlled sheared in the steady and oscillatory shear flow, using a rotational rheometer,…
The effects of adsorption on the graphite(0001) surface on the nonplanar dis-tortions of nickel(II)octaethylporphyrin were studied by molecular mechanics (MM) ap-proach. Using the Consistent Force Field (CFF) program with previously developed pa-rameters for metalloporphyrins and supplemented to treat intermolecular i…
We present the atomically resolved room temperature scanning-tunneling microscopy study of bias dependent images of charge density waves (CDWs) in $1T\text{\ensuremath{-}}\mathrm{Ta}{\mathrm{Se}}_{2}$. With the help of angle-resolved photoemission of the CDW-split $\mathrm{Ta}\phantom{\rule{0.2em}{0ex}}{d}_{{z}^{2}}$…