Materials Literature
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In order to store and use thermodynamic knowledge in materials design, we develop a user-friendly, extensible, self-optimizing phase equilibrium software package: ESPEI, which integrates databases (crystallographic, phase equilibrium, thermochemical, and modeled Gibbs energy data, etc) and database development (automa…
We report the synthesis of annulated azepines, conjugated seven-membered ring systems with nitrogen, designed to undergo an electrochemically controlled bent-to-planar transformation driven by aromatization. A Pd-catalyzed double amination strategy enabled us to synthesize annulated azepines, which are thermally and e…
The effect of $A$-site incorporated ${\text{Ba}}^{2+}$ and ${\text{Bi}}^{3+}$ on the pressure-driven structural transformations in Pb-based perovskite-type relaxor ferroelectrics has been studied with in situ x-ray diffraction and Raman scattering of ${\text{PbSc}}_{0.5}{\text{Nb}}_{0.5}{\text{O}}_{3}$, ${\text{Pb}}_{…
We theoretically prove that electromagnetic beams propagating through a nonlinear cubic metamaterial can exhibit a power flow whose direction reverses its sign along the transverse profile. This effect is peculiar of the hitherto unexplored extreme nonlinear regime where the nonlinear response is comparable or even gr…
Below its ordering temperature at 105 K, perovskite-type SrTiO(3) exhibits a tetragonal phase with three different structural domains that are strongly influenced by the application of uniaxial mechanical stresses and electric fields. A careful neutron diffraction study of superlattice reflections provides full quanti…
First-principles-based Monte Carlo approaches are developed to investigate finite-temperature properties of stress-free nanodots made of the ferroelectric Pb(Zr,Ti)O3 system and of the multiferroic BiFeO3 compound. These zero-dimensional materials both exhibit various, novel chiral patterns for the tilting of the oxyg…
This paper proposes a method to design an incident-angle-insensitive polarization-independent polarization rotator. This polarization rotator is composed of layers of impedance-matched anisotropic metamaterial (IMAM) with each layer's optical axes gradually rotating an angle. Numerical simulation based on the generali…
Large shifts of the selective reflection band and colour changes are achieved in highly viscous mixtures of cholesteric polymers and low molar mass liquid crystals subject to mechanical deformation. The liquid crystal mixture was sandwiched between two silicone strips and stretched. The colour of the material changed…
In this study, in order to observe the effect of spinning systems such as ring, rotor and vortex, and twist direction of the folded yarns on the fabric handle properties, single end yarns were produced in the same yarn count, yarn twist, and twist directions. After that, the single end yarns were folded on the same do…
ABSTRACT Rotating bending fatigue tests have been performed using Diamond‐like carbon (DLC) coated specimens of a wrought magnesium alloy, AZ80A, in laboratory air and demineralised water and the effect of DLC coating on fatigue and corrosion fatigue behaviour was studied. Three film thicknesses of 3.5 μm, 13 μm, and…
In single crystals of Eu(1-x)Sr(x)Fe(2-y)Co(y)As(2), Co doping suppresses spin-density wave (SDW) ordering and induces a superconducting transition. A resistivity reentrance due to the antiferromagnetic ordering of Eu(2+) spins is observed, indicating the competition between antiferromagnetism (AFM) and superconductiv…
The catalytic activity in the reforming of naphthalene of two different types of catalytic filter candles for biomass-derived syngas cleaning are presented and compared at superficial velocities of 72 and 90 m/h, respectively. The tests were performed in a laboratory setup on a fixed catalyst bed and small sections of…
This paper reports the top-down fabrication of carbon nanotube (CNT) thin film on microelectrical mechanical systems (MEMS) and the characterization of the thermoelectric coefficients of aligned single-walled carbon nanotube (SWNT) forest film. The film was synthesized by water-assisted chemical vapor deposition (CVD)…
The nucleation and growth of silver nanoclusters on TiO 2 (110) surfaces with on-top O adatoms (oxidized TiO 2 ), surface O vacancies and H adatoms (reduced TiO 2 ) have been studied. From the interplay of scanning tunneling microscopy/photoelectron spectroscopy experiments and density functional theory calculations,…
A magnetite (Fe3O4) nanoparticle/chiral nematic liquid crystal (N*-LC) composite was prepared and filled into a planar treated cell. The Fe3O4 nanoparticles had been modified by oleic acid so that they could be better dispersed in the composite. When a magnetic field was scanned on the outer surface of the cell locall…
A liquid cooling garment (LCG) protects astronauts by providing cooling effects and preventing them from overheating. The objectives of this project were to improve fit and comfort of the original LCG hood of the MACS-Delphi garment and develop a new prototype. The project was conducted by researchers with different b…
This paper presents two applications of the coupled-line composite right/left-handed (CL-CRLH) unit cell, compact-size rat-race hybrid, and arbitrary coupling directional coupler. Benefiting from the slow-wave effect present in both the right- and left-handed regions of the CL-CRLH unit cell, two compact-size rat-race…
The self-assembly of a low molecular weight organic chromophore occurs upon reprecipitation in water and yields 120 nm wide disk-like nanoparticles (NPs), as shown by fluorescence correlation spectroscopy (FCS) and atomic force microscopy (AFM). The NPs are able to incorporate perylene molecules previously present in…
Surface potential decay (SPD) measurements are considered as the most appropriate technique for the investigation of the corona charging of dielectric surfaces. The aim of the experiments reported in the present paper was to point out the peculiarities of SPD in the case of nonhomogeneous dielectrics, such as the nonw…
Abstract The carbonization of nanostructures afforded by conducting polymers represents a new route to the preparation of functional nanostructured carbons. The exposure of colloidal polyaniline particles stabilized with poly( N ‐vinylpyrrolidone) or silica nanoparticles at 650 °C in inert atmosphere led, in both case…