Materials Literature
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Abstract The electrodeposition of polypyrrole–phosphate (PPy–P) and polypyrrole–tungstenate (PPy–W) on mild steel (MS) were achieved in an oxalic acid medium with cyclic voltammetry techniques. Adherent and homogeneous PPy–P and PPy–W films were obtained. The corrosion behavior of mild steel with phosphate (PPy–P) and…
Nanocomposites based on polypropylene (PP) and multiwall carbon nanotubes (MWNT) have been prepared through melt blending. Scanning electron microscopy (SEM) observations indicate that nanotubes were dispersed almost homogeneously throughout the matrix; however, some aggregates were also observed at high nanotubes loa…
Recent experimental results indicate the possible realization of an even frequency $p$-wave triplet superconducting state in proximity affected ${\text{La}}_{0.65}{\text{Ca}}_{0.35}{\text{MnO}}_{3}\ensuremath{-}X(X=\text{Pb},{\text{MgB}}_{2})$ point contacts (PCs). Motivated by this we present a study of the current-v…
In this work, five yttria powders with slightly different states of agglomeration, inherited from various procedures of dewatering the same precursor, were densified by a combination of vacuum sintering followed by hot isostatic pressing (HIP). In order to relate the densification behavior of each powder to its state…
The synthesis, structure, and characterization of a [Yb(Tren-Me-3,2-HOPO)(H 2O) 2] complex are reported. As a result of its Yb (III) emission in the near-infrared region, sensitized by the Me-3,2-HOPO chromophore, this complex can be utilized for the first time to determine the hydration state, q, via the luminescence…
Abstract This study was performed with commercially available phenyl trimethoxysilane (PTMS) and neoalkoxytitanate [i.e., neopentyl(diallyl)oxytri(dioctyl)phosphato titanate (LICA 12)] as coupling agents. PTMS and LICA 12 were used to treat talc and kaolin to compare their effects with untreated fillers upon incorpora…
The reversal process of the chirality of each opposite vortex belonging to a double vortex state in ferromagnetic hysterons, via the application of in-plane magnetic fields, is reported. Simulations reveal that such a process involves the formation of four intermediate states, including original ones. Hysteresis loops…
Abstract A novel fluorescent ( p ‐phenylene ethynylene)‐calix[4]arene‐based polymer ( CALIX‐PPE ) has been successfully synthesized by cross‐coupling polymerization of bis‐calix[4]arene 1 with 1,4‐diethynylbenzene. The polycondensation was carried out in toluene/NEt 3 at 35 °C for 24 h, using PdCl 2 (PPh 3 ) 2 /CuI as…
Large-scale atomistic simulations considering a 5 nm in radius H-passivated Si nanosphere that impacts with relatively low energies onto a H-passivated Si substrate reveal a transition between two fundamental collision modes. At impacting speeds of less than $\ensuremath{\sim}1000\text{ }\text{m}/\text{s}$ particle-re…
Abstract Tellurites may be subdivided according to formula and structure. There are five groups based upon the formulae (a) A(XO 3 ), (b) A(XO 3 )·xH 2 O, (c) A 2 (XO 3 ) 3 · x H 2 O, (d) A 2 (X 2 O 5 ) and (e) A(X 3 O 8 ). Raman spectroscopy has been used to study the tellurite minerals teineite and graemite; both co…
A series of photochromic spirooxazine-containing zinc(II) diimine bis-thiolate complexes were successfully synthesized, and their photophysical and photochromic properties were studied. The X-ray crystal structure of complex 1a has also been determined. Upon excitation by UV light at 330 nm, all the ligands and comple…
Density functional theory calculations were carried out to study the charge transfer properties of bis(phthalocyaninato) yttrium and lanthanum double-decker complexes M(Pc) 2 (M = Y, La) for organic field effect transistors. The results indicate that the intrinsic delocalized hole in M(Pc) 2 (M = Y, La) induces the hi…
Oxomolybdenum(VI) complexes of 3,4-dihydroxybenzoic acid (3,4-H 2dhb) have been incorporated into layered double hydroxides (LDHs) by treatment of the LDH-nitrate (Zn-Al, Mg-Al) or LDH-chloride (Li-Al) precursors with aqueous or water/ethanol solutions of the complex (NMe 4) 2[MoO 2(3,4-dhb) 2].2H 2O at 50 or 100 degr…
Nanostructured semiconductors with favorable optoelectronic properties can be created by electrochemical etching, a fabrication process that is scalable for mass market applications. Using terahertz photoconductivity measurements, we demonstrate that nanoporous InP has an unusually long carrier recombination lifetime…
Antiferromagnetic superexchange: Two new 1D ferrimagnetic chains [Gd(pzam)3(H2O)M(CN)8]⋅H2O (MV=Mo 1, W 2) are synthesized and characterized; magnetic susceptibility data indicate antiferromagnetic superexchange between GdIII and MV via the cyanido bridge, and the occurrence of long-range magnetic ordering between cha…
Abstract The area fraction of tie molecules at the crystal–amorphous interface, amorphous phase dynamics, average crystal strength against stem sliding, and crack growth tortuosity concepts have been used simultaneously, for the first time, to develop a model for predicting the environmental stress cracking resistance…
Textile composites are composed of textile reinforcements combined with a binding matrix. The available textile reinforcements are manufactured by weaving, braiding, knitting and stitching. Since the studies about weft-knitted composites began then these materials have attracted increasing attention because of their p…
The performance of multimetal-(Cu, Cr, Zn, Ni, and Co)-ion-exchanged zeolite A prepared from both a commercial-grade sample and one produced from coal fly ash in methane emissions abatement was evaluated in this study. The ion-exchange process was used to load the metal ions in zeolite A samples. The methane conversio…
Differential scanning calorimetry (DSC) was used to study the isothermal crystallization kinetics of isotactic polypropylene (iPP) nucleated with a third generation sorbitol derivative l,3:2,4-bis(3,4-dimethylbenzylidene) sorbitol (DMDBS). The results show that the incorporation of DMDBS can greatly shorten crystalliz…
Surfactant anion intercalated hydroxy salts of copper and cobalt of the formula M(OH)2- x (surf)x.mH2O [M = Cu, Co; surf = dodecyl sulfate, dodecyl benzene sulfonate, and x = 0.5 for Cu and 0.67 for Co] delaminate readily in 1-butanol to give translucent colloidal dispersions that are stable for months. The extent of…