Materials Literature
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Abstract The differential reflection of p‐ and s‐polarized light by interfaces and thin films is central to the theory and applications of ellipsometry. It is also the basis of a wide variety of optical devices for the control and analysis of polarized light such as polarizers, polarizing and polarization‐preserving b…
We report the effect of stacking fault on the formation of the saw-teeth of ZnS nanosaws, which were synthesized by a hydrogen-assisted thermal evaporation method. The stem of ZnS nanosaw grows along the [101̅0] direction and possesses wurtzite (WZ) structure, while the saw-tooth grows along the [111] direction and po…
Abstract This study reports on the effect of gamma radiation on morphological, thermal, and water barrier properties of pure ethylene vinyl alcohol copolymers (EVOH29 and EVOH44) and its biocomposites with the nanofiller microfibrillated cellulose (2 wt %). Added microfibrillated cellulose (MFC) preserved the transpar…
Three novel series of triphenylene-based derivatives possessing functional group (ester, carboxylic acid, or hydroxy) at the ends of two aliphatic chains on the opposite position of triphenylene core have been synthesized and studied on mesomorphic properties. Their chemical structures were characterized by FT-IR, 1H-…
Highly functionalized fluorinated porphyrins were synthesized by a convergent strategy. Nucleophilic substitution using fluorinated branched unit and 5,10,15,20-tetrakis(pentafluorophenyl)porphyrin afforded highly functionalized fluorinated porphyrin 8 containing 24 fluorinated chains in the peripheral region.
A novel mechanism of carbon black network formation in a binary immiscible rubber blend has been proposed in this paper. The network formation implies that the specific rubber molecules are selectively confined into the void of carbon black aggregate structure during their solution mixing. The selective adsorption and…
The adsorption of acetate species (CH 3 COO - ) on the Ag/ Al 2 O 3 catalyst has been studied using in situ diffuse reflectance infrared Fourier transform spectroscopy and Density functional theory (DFT). The geometrical structures and vibrational spectra were obtained at the PBE1PBE level of DFT and compared with the…
Classically, there have been two different ways to obtain mean-field theories for liquid crystals. One is based on short-range repulsive steric forces and the other on long-range attractive dispersion forces. In the former approach, it is the anisotropic shape of the molecules that leads to the anisotropic interaction…
The unoccupied electronic states of $\mathrm{La}\mathrm{Co}{\mathrm{O}}_{3}$ and $\mathrm{Pr}\mathrm{Co}{\mathrm{O}}_{3}$ are studied using room temperature inverse photoemission spectroscopy and ab initio $\mathrm{GGA}+U$ band structure calculations. A fairly good agreement between experiment and theory is obtained.…
Abstract The adhesion properties, i.e. viscosity, tack, and peel strength of pressure‐sensitive adhesives prepared from natural rubber/epoxidized natural rubber blends were investigated using coumarone‐indene resin and toluene as the tackifier and solvent respectively. One grade of natural rubber (SMR 10) and two grad…
Abstract Cs 2 Hg 27 , the Mercury‐richest Amalgam with Close Relationship to the Bergman Phases By electrolyzing a solution of cesium iodide in N,N‐dimethylformamide at 2 °C on a mercury cathode the amalgam Cs 2 Hg 27 can be synthesized. It crystallizes in an own cubic structure type (space group $Im{\bar 3}$ , a = 16…
Die Empfindlichkeit der Mößbauer-Spektroskopie für kleinste lokale Verzerrungen in der Molekülstruktur wurde anhand von [FeII2(pmat)2](BF4)4⋅DMF aufgezeigt: High-Spin(HS)-Eisen(II)-Zentren in [HS-HS]- und [LS-HS]-Paaren waren ohne Anlegen eines Magnetfelds unterscheidbar (siehe Bild). Dieser zweikernige Komplex belegt…
Abstract Two novel bismaleimide (BMI) monomers containing silicon atom in the structure, i.e., bis[4‐(4‐maleimidophenylcarbonyloxy)phenyl]dimethylsilane (BMI‐SiE1) and bis[4‐(4‐maleimidophenyloxycarbonyl)phenyl]dimethylsilane (BMI‐SiE2), were designed, synthesized, and polymerized with and without the use of diamine a…
ZnS powders with primary crystallite sizes of only a few nanometers were prepared by three different synthesis routes at temperatures below 130 degrees C. The reaction of zinc acetate dihydrate with thioacetamide (TAA) in the presence of pyridine and triphenylphosphite (TPP) was carried out using either conventional h…
Phase diagrams of the binary mixtures of the title compounds were constructed to investigate the effect of different polar substituents, on the pyridine-based derivatives, as well as the alkoxy-chain length, on the acids, on the extent and stability of the supramolecular liquid crystal phases induced by intermolecular…
Chemical vapor deposition of carbon nanotubes (CNTs) in a horizontal tube-flow reactor has been investigated with a fully coupled reactor-scale computational model. The model combined conservation of mass, momentum, and energy equations with gas-phase and surface chemical reactions to describe the evolution of a hydro…
OBJECTIVE: Infection at time of MR contrast administration has been reported to predispose patients with renal failure to development of nephrogenic systemic fibrosis (NSF). We assessed the frequency of infection at the time of MR contrast administration in a group of NSF patients. MATERIALS AND METHODS: Eight patient…
Stepwise acetylenic scaffolding provides cruciform-conjugated molecules with vertically disposed pi-systems, one being an extended tetrathiafulvene (TTF) unit. Two synthetic routes for a cruciform dimer incorporating a total of two extended TTFs was developed, employing either an oxidative Hay coupling reaction as the…
Surkhobite, a new mineral related to the members of the jinshajiangite-perraultite series, was approved in 2002 (IMA No. 2002-037) and later discredited (IMA decision 06-E). It is redefined here with a new formula and revalidated with the original name (IMA 07-A). It occurs as platy crystals up to 1 mm and grains up t…
Viewing angle control of a patterned vertical alignment (PVA) liquid crystal display using only one panel is investigated. In conventional PVA modes, a vertically aligned liquid crystal (LC) director tilts down in four directions making 45° with respect to crossed polarizers to exhibit a wide viewing angle. In the vie…