Materials Literature
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Abstract Graft copolymer nanoparticles prepared from chitosan (CS) and methyl methacrylate (MMA) monomer were synthesized in aqueous solution by using potassium diperiodatocuprate [Cu(III)] as an initiator and characterized in terms of particle size, zeta potential, transmission electron microscopy (TEM), Fourier tran…
Silicone elastomer compounds are a reliable option for gas pressure seals used in space applications. Seals fabricated from these compounds effectively meet typical leak rate, compression force, and outgassing requirements. One negative characteristic of silicone elastomer compounds use in space applications, however,…
Abstract The copolymer of styrene–ethylene–butylene–styrene triblock copolymer‐ g ‐polylactic acid (SEBS‐ g ‐PLA) was successfully prepared using a novel solvothermal synthetic method, in which the graft copolymerization of PLA and SEBS was simply performed in cholorform solution at 100–150°C with benzoyl peroxide (BP…
Hot Rod: Using the reprecipitation method, microrods of 2,5-dibromo-3,4-ethylenedioxythiophene (DBEDOT) were prepared in aqueous solution. The as-synthesized microrods were found to polymerize in aqueous solution after heated at 75 °C for 4 hours.
Much research has shown that V 2 O 5 /AC is promising for the selective catalytic reduction (SCR) of NO with NH 3 at low temperatures (180−250 °C). However, information on N 2 O formation and AC oxidation during the SCR process are limited especially under actual conditions in the presence of SO 2 and H 2 O. These are…
The strong coupling between lattice modes and charges which leads to the formation of charge density waves in materials such as the transition-metal dichalcogenides may also give rise to superconductivity in the same materials, mediated by the same exciton or phonon modes that dominate the charge-ordered state. Such a…
The thermodynamic properties of a simple fluid confined by effective wall forces are calculated using Monte Carlo simulations in the grand canonical ensemble. The solvation force produced by polymer brushes of two different lengths is obtained also. For the particular type of model interactions used, known as the diss…
Short-wavelength electroluminescence (EL) emission is observed from unipolar and ambipolar carbon nanotube field-effect transistors (CNFETs) under high bias voltage. EL measurements were carried out with an unsuspended single-walled carbon nanotube (SWNT) in high vacuum to prevent the oxidation damage induced by curre…
Novel biferrocenyl complexes of s - and as -dihydroindacenes have been prepared and the charge transfer properties of their mono- and dicationic derivatives, selectively generated by one-electron and two-electron oxidation, have been investigated. Mixed-valence cations are generated by chemical oxidation using acetylf…
Caught on film: NO exposed to monolayer FeO(111) film grown on Pt(111) at elevated pressures readily forms a trilayer OFeO film that is virtually identical to that formed with O2. However, CO2 production in the CO+NO reaction is negligible as compared to CO+O2, which is rationalized in terms of the replenishment of ox…
We report the effects of growth conditions on the superconducting properties of FeSe films epitaxially grown on LaAlO3 substrates by pulsed laser deposition (PLD). Customary materials characterization techniques [X-ray diffraction (XRD), in-situ X-ray photoelectron spectroscopy (XPS), in-situ ultra-violet photoelectro…
Acquired partial discharge (PD) signals are always affected by various noises in the process of propagation and detection. These errors have great impact on the accuracy of location of the PD source. In this study, a new PD location algorithm based on the time difference on an energy accumulation curve of multiple sig…
Structures, energetics, and vibrational spectra are investigated for small pure (TiO(2))(n), (SiO(2))(n), and mixed Ti(m)Si(n-m)O(2n) [n = 2-5, m = 1 to (n - 1)] oxide clusters by density functional theory (DFT). The BP86/ATZP level of theory is employed to obtain constitutional isomers of the oxide clusters. In accor…
By using the Au-catalyzed vapor-liquid-solid growth of ZnO and In${}_{2}$O${}_{3}$ nanowires as examples, we demonstrate the critical role of the coalescence of Au catalyst nanoparticles in determining the final diameter distribution of oxide nanowires. The enhanced coalescence is facilitated by a transient liquid-sta…
Abstract A series of structurally well‐defined enantiopure tripodal allyl dendritic structures bearing three amine groups have been synthesized. The hydrogenation of the allyl groups in the presence of a Pd/C catalyst gave the corresponding enantiopure n ‐propyl counterparts. Treatment of these n ‐propyl amino dendrim…
Li-Nickel ferrites with the chemical formula () have been prepared by the ceramic method. The spinel structure in homogenous state was realized by X-ray diffraction analysis. The lattice parameter has been determined for each composition and found to be nearly constant over the whole range of Ni concentration (= 0.83…
The adsorption of fluconazole (FLU) on aluminum surface from 0.1 M HCl solution was studied using chemical technique at 30°–50°C. The values for free energy of adsorption, , were calculated at each surface coverage, θ, of the studied compound by applying the mathematical model of the Bockris-Swinkels adsorption isothe…
Abstract Using time‐dependent density functional theory and the polarizable continuum model, we have simulated the absorption spectra of an extended series of azobenzene dyes. First, we have determined a theoretical level optimal for this important class of dyes, and it turned out that a C‐PCM‐CAM‐B3LYP/6‐311+G(d,p)//…
This paper demonstrates for the first time thermally induced gradual hydrophobization, monitored quantitatively by ellipsometric porosimetry, of four prototypical periodic mesoporous organosilicas (PMOs) that are tailored through materials chemistry for use as low-dielectric-constant (low k) materials in microprocesso…
The electrical response of graphene-based materials can be tailored under mechanical stress. We report different switching behaviors that take place in mechanically deformed graphene nanoribbons prior to the breakage of the junction. By performing tight-binding molecular dynamics, the study of structural changes of gr…