Materials Literature
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We present a study of the thermodynamic and physical properties of Tl(5)Te(3), BiTl(9)Te(6), and SbTl(9)Te(6) compounds by means of density functional theory based calculations. The optimized lattice constants of the compounds are in good agreement with the experimental data. The electronic density of states and band…
Despite the many processes developed for carbon nanotube synthesis, few if any of these control the carbon nanotube diameter and length simultaneously. Here, we report a process whereby we synthesize vertically aligned carbon nanotube arrays (VA-CNT) using water-assisted chemical vapor deposition from solution process…
Abstract The hydrophilicity of polytetrafluoroethylene (PTFE) micropowders was easily achieved by modifying the surface with thin polydopamine(Pdop) layer deposited through spontaneous oxidative polymerization of dopamine. Compared with the pure PTFE, the Pdop modified PTFE(PTFE@Pdop) possesses excellent hydrophilic p…
Abstract Ba 0.7 Sr 0.3 TiO 3 (BST) ceramics with different dopants and various grain sizes were fabricated by the solid‐state reaction process, and the doping and grain size effects on dielectric and dc bias field‐induced pyroelectric properties were systemically investigated. When acceptors were added, the dielectric…
The reaction mechanism of the highly efficient (phi = 0.60), selective photochemical epoxidation of alkenes sensitized by CO-coordinated tetra(2,4,6-trimethyl)phenylporphyrinatoruthenium(II) (Ru(II)TMP(CO)), with water acting both as an electron and oxygen atom donor, was investigated. The steady-state light irradiati…
Two bis(terpyridine)ruthenium(II) complexes 2 and 3 appended with one or two di-p-anisylamino groups, respectively, were synthesized and fully characterized. Their electronic properties were studied by electrochemical and spectroscopic analyses. Electronic communication between individual amine sites of 3 was estimate…
Plasma electrolytic nitrocarburizing (PEN/C) was applied to the surface of carbon steel under the boiling condition of saturated urea electrolyte. In addition to the general effect of the bath temperature, different applied voltages and processing times were also considered in this new process. Optical and scanning el…
We investigate, at a density functional level, the electric characteristics of 18 complexes of cobalt phthalocyanine (CoPc) and cobalt tetraaminephthalocyanine (CoTAPc) adsorbed on graphene functionalized with CO 2 – or CO moieties. Three models of graphene molecules are used, pristine, defect, and vacancy, leading to…
Abstract Density‐functional theory (DFT) calculations have been combined with a thermodynamic formalism to determine a phase diagram of lowest‐energy structures and compositions of the polar NiO(111) surface in equilibirum with oxygen, hydrogen, and water reservoirs at finite temperatures and pressures. Consistent wit…
We present a new model and method for the Monte Carlo simulation of silica polymerization in aqueous solution. We focus on the idea that silica structures are built from corner sharing tetrahedra and these tetrahedra are the basic units of the model. Rather than use a reactive force field, the assembly of tetrahedral…
Abstract A series of solution‐processable electrochromic (EC) aromatic polyamides with bis(triphenylamine)ether (TPAO) units in the backbone were prepared by the phosphorylation polyamidation from a newly synthesized diamine monomer, bis( N ‐4‐aminophenyl‐ N ‐4‐methoxyphenyl‐4‐aminophenyl)ether, and various dicarboxyl…
Abstract Glycidyl methacrylate (GMA) was grafted onto natural rubber (NR) using emulsion polymerization method. The structures of copolymers were characterized by 1 H nuclear magnetic resonance ( 1 H‐NMR), solid state 13 C‐NMR spectroscopy, and Fourier transform infrared spectrometer (FTIR). The %grafting obtained fro…
We report the thermodynamic measurement of the enthalpy released during the aging of supported films of a molecular glass former, toluene, at temperatures well below the glass transition temperature. By using microfabricated devices with very short equilibration times (below 1 s), we evidence a remarkable variation of…
Thermal rectification is a phenomenon in which transport is preferred in one direction over the opposite. Although observations of thermal rectification have been elusive, it could be useful in many applications such as thermal management of electronics and improvement of thermoelectric devices. The current work explo…
Core-shell nanofibers are of great interest in the field of tissue engineering and cell biology. We fabricated porous core-shell fiber networks using an electrospinning system with a water-immersed collector. We hypothesized that the phase separation and solvent evaporation process would enable the control of the pore…
We study the condition for optimizing superconductivity in the iron pnictides from the lattice structure point of view. Studying the band structure of the hypothetical lattice structure of LaFeAsO, the hole Fermi-surface multiplicity is found to be maximized around the Fe-As-Fe bond angle regime where the arsenic atom…
Scotta is the main by-product in the making of ricotta cheese. It is widely produced in southern Europe and particularly in Italy where it represents a serious environmental pollutant due to its high lactose content. With the aim of evaluating whether scotta bioconversion into lactic acid can be considered as an alter…
Written for graduate students, researchers, and practitioners, this book provides a complete introduction to the science, engineering, and commercial applications of polymer-clay nanocomposites. Starting with a discussion of general concepts, the authors define specific terms used in the field, providing newcomers wit…
The photoluminescence (PL) study in porous silicon (PS) with decreasing Si crystallites size among the pores was reported. The PL appearance is attributed to electronic confinement in columnar-like (or dotlike) structures of porous silicon. Three different pore diameter PS samples were prepared by electrochemical etch…
Dumbbell-shaped trifluoropropyl-substituted C2-linked POSS (POSS-DE), C3-linked POSS (POSS-DP), and C6-linked POSS (POSS-DH) were prepared by corner-capping of hepta(3,3,3-trifluoropropyl)tricycloheptasiloxane trisodium silanolate (F7-Na) with 1,2-bis(trichlorosilyl)ethane, 1,3-bis(trichlorosilyl)propane, and 1,6-bis(…