Materials Literature
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Using a conventional thermal chemical vapor deposition (CVD) system, ethanol vapor was enclosed in a reactor, i.e., no flow, with Co/Mo dip-coated quartz substrates to synthesize submillimeter long vertically aligned single-walled carbon nanotube (SWNT) films successfully. The no-flow CVD method yielded an increase in…
Organophilic clay particles were added to a standard intumescent formulation and, since the role of clay expansion or intercalation is still a matter of much controversy, several clays with varying degrees of interlayer distances were evaluated. The composites were obtained by blending the nanostructured clay and the…
This paper presents results of different dilutions of PEDOT:PSS on the uniformity, pattern definition and conductivity of inkjet printed films. PEDOT:PSS was diluted in water, ethylene glycol (EG) and dimethyl sulfoxide, (DMSO) in order to achieve the required viscosity in the range of 2 to 30 cps. In order improve th…
We present the successful synthesis of aligned 13 C labeled single-walled carbon nanotube (SWNT) arrays from alcohol by a modified no-flow chemical vapor deposition (CVD) method that makes efficient growth possible using a small amount of carbon source. The synthesis of high-quality SWNTs by this alternative method wa…
High-field x-ray diffraction and magnetization measurements and differential thermal analysis (DTA) were carried out for polycrystalline MnBi with an NiAs-type hexagonal structure to investigate its magnetic and structural phase transitions. The lattice parameter a rapidly decreases below the spin reorientation temper…
This article describes the thermal and thermomechanical properties of poly(butylene succinate) (PBS) and its nanocomposites. PBS nanocomposites with three different weight ratios of organically modified synthetic fluorine mica (OMSFM) have been prepared by melt-mixing in a batch mixer at 140 degrees C. The structure a…
The linear and nonlinear dielectric relaxation spectra, recorded in the isotropic phase of mesogenic 4-(trans-4'-n-hexylcyclohexyl)isothiocyanatobenzene (6CHBT), reveal an equilibrium between the molecules that are involved and non-involved in the pseudo-nematic domains, which are spontaneously formed in the prenemati…
We have applied molecular dynamics simulation and density functional theory calculations to analyze the effects of H and OH terminations on the frictional properties of diamond films at the atomistic and electronic levels. Molecular dynamics simulations were carried out for H-, OH-, and non-terminated diamond surfaces…
Abstract Poly(ethylene terephthalate) (PET) hybrids with newly synthesized functionalized multiwalled carbon nanotubes (MWNTs) were obtained by carrying out the in situ polycondensation of ethylene glycol with dimethyl terephthalic acid. The PET hybrids were melt‐spun to produce monofilaments with various functionaliz…
Plants, algae, and their derivatives (paper, textiles, etc.) are complex systems that are chiefly composed of a web of cellulose fibers. The arrangement of solvents within the polymeric structure is of great importance since cellulose degradation is strongly influenced by water accessibility and external agents. In th…
Here, we report on the observation of a weak ferromagnetic transition at TN=122K in a K3Fe5F15 system which is ferroelectric and ferroelastic below Tc=490K. The magnetization and the susceptibility continuously increase with decreasing T down to 2K. The Mössbauer spectra show a spontaneous magnetic ordering and at lea…
The results of the first study on the thermoelectric power (Seebeck effect) of single crystals of Fe3O4 magnetite at high pressure P up to 20 GPa and room temperature are reported. The electrical resistance and a sample's contraction (relative compressibility) were also investigated over a P range of 0–20 GPa. A smoot…
It has long been puzzling regarding the atomistic origin of the pressure-induced Raman optical phonon stiffening that generally follows a polynomial expression with coefficients needing physical indication. Here, we show that an extension of the bond-order-length-strength correlation mechanism and a local bond average…
Ferroelectric properties and fatigue endurance of 5% Mn-substituted BiFeO 3 (BFO) films deposited on iridium (Ir) and platinum (Pt) electrodes have been discussed. 5% Mn-substituted BFO thin films have been formed on Ir/Ti/SiO 2 /Si(100) and Pt/Ti/SiO 2 /Si(100) substrates by chemical solution deposition (CSD). X-ray…
On the basis of Peierl coupling tight-binding model, we study the low energy magnetoelectronic properties of zigzag graphene ribbons by changing the ribbon width from the nanometer to the mesoscopic scale. The evolution of the Landau levels with the ribbon width shows that the number and the range of Landau levels are…
Quantitative assessment of a disproportionation in the ZrCo-hydrogen system under ITER-relevant operating conditions was performed by means of experimental tests and a theoretical calculation. In the static temperature experiments with equilibrium hydrogen pressures, a 10% disproportionation of ZrCoHx (x = 2.0 and 2.5…
A bisporphyrinocalix[4]arene was prepared, and its basicity was examined spectrophotometrically. The protonation of tetrapyrrole fragments of the porphyrinocalixarene conjugate in the ethanol-sulfuric acid system occurs in two steps and is described by the Hammett equation. The ionization constants and the concentrati…
Spiders spin high performance fibers with diverse biological functions and mechanical properties. Molecular and biochemical studies of spider prey wrapping silks have revealed the presence of the aciniform silk fibroin AcSp1-like. In our studies we demonstrate the presence of a second distinct polypeptide present with…
Using group-III atom Al as doping element, Ba8Ga16AlxGe30−x (x=1.0, 2.0, 3.0, 4.0, and 5.0) type-I clathrates with different Al content were synthesized by combining melting reaction with spark plasma sintering method. The effects of Al content on thermoelectric properties are investigated. X-ray diffraction patterns…
The paper reports on tests done on four commercial room temperature vulcanized (RTV) silicone rubber high voltage insulator coatings aimed at achieving information on the relative performance of the coatings with respect to aging. The initial characterization of the coatings includes the identification of the primary…