Materials Literature
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We report a study of crystallographic parameters of the Sr 2 CoNbO 6 double perovskite obtained from Rietveld analysis of X-ray diffraction data and electronic properties predictions using the density functional theory (DFT). The Sr 2 CoNbO 6 material was prepared by the citrate precursor method. Diffraction analysis…
Oscillator-strength sum rule in light-induced transitions is one general form of quantum-mechanical identities. Although this sum rule is well established in equilibrium photo-physics, an experimental corroboration for the validation of the sum rule in a nonequilibrium regime has been a long-standing unexplored questi…
Abstract Multi‐layered (Y2O3)0.08(ZrO2)0.92/(Sc2O3)0.1(CeO2)0.01‐(ZrO2)0.89(YSZ/SCSZ) electrolytes have been designed, so that the inner SCSZ layers provided superior ionic conductivity and the outer YSZ skin layers maintained good chemical and phase stability. Due to the mismatch of coefficients of thermal expansion…
Two-dimensional Au islands of different thicknesses grown on graphene/Ru(0001) were used to study the corrugation of the moiré structure of graphene/Ru(0001) and discriminate between its mainly structural or electronic character. A comparison of the apparent corrugation measured by scanning tunneling microscopy (STM)…
Abstract Redox tolerance of 50 and 500 μm thick Ni/YSZ (yttria‐stabilized zirconia) anodes supported on YSZ electrolytes were studied under single‐chamber solid oxide fuel cell conditions. Open circuit voltage, electrochemical impedance spectra, and discharge curves of the cells were measured under different methane/o…
The present study focuses on a bi-stable von-Mises truss (VMT), with integrated Shape Memory Alloy (SMA) wires which are resistively heated to provide the actuation force to transition the VMT from one stable equilibrium condition to the other, and back. This coupled VMT-SMA system can potentially be used in structura…
Motivated by the recent report of superconductivity in Fe-based ladder materials, we study the pairing state of a multiorbital $t$-$J$ model defined on two-leg ladders using the standard mean-field theory. We find that the superconducting order parameters change sign between the ${d}_{xz}$ and ${d}_{yz}$ orbitals in m…
In this paper, the formation of ZrO₂ and yttria-stabilised-zirconia (YSZ) aqueous colloidal systems via microwave assisted hydrothermal synthesis is studied. Microwave synthesis allows a fast screening of the influence of different parameters such as time and temperature. The temperature varied from 140 °C up to 180 °…
Carrier multiplication (CM)—the Coulomb scattering whereby a sufficiently energetic charge excites a valence electron—is of interest for highly efficient quantum dot (QD) photovoltaics. Using time-resolved microwave conductivity experiments on 1,2-ethanedithiol-linked PbSe QD solids infilled with Al 2 O 3 or Al 2 O 3…
Controlling the growth orientation of carbon nanotubes (CNTs) is a topic of great importance in the integration of CNTs into micro/nanosystems. The electric field has been exploited to control the growth orientation of CNTs. In this letter, the diameter dependency of the effect of an electric field on the growth orien…
In this letter, a meshed leg structure is proposed for the first time to control the thermal conductivity in the uncooled microbolometer arrays without changing the fill factor. An amorphous silicon-based microbolometer was fabricated with 64 × 64 arrays with a 35 μm pixel pitch to verify the proposed design. The hole…
Shape Memory Alloys (SMAs) have many promising applications in the aerospace, automotive, and energy industries. However, due to a lack of understanding of their actuation fatigue, applications are sometimes limited to non-structural or non-critical components. This paper addresses the actuation fatigue characteristic…
The glucopyranoside-conjugated porphyrins, H 2 TPP {p- O -( CH 2 ) 2 - O - OAcGlc } (1), [ InTPP {p- O -( CH 2 ) 2 - O - OAcGlc }] NO 3 (2), H 2 TPP {p- O -( CH 2 ) 2 - O - Glc } (3), [ InTPP {p- O -( CH 2 ) 2 - O - Glc ]- NO 3 (4) and ZnTPP {p- O -( CH 2 ) 2 - O - OAcGlc } (5) were synthesized, and characterized by 1…
With increasing interest in epoxy‐based carbon fiber composites for structural applications, it is important to improve the fire resistant properties of these materials. The fire resistant performance of these materials can be improved either by using high performance epoxy resin for manufacturing carbon fiber composi…
ABSTRACT A series of polyimide foam sheets (PIFSs) with thickness of 0.5 mm using 3,3′,4,4′‐benzophenonetetracarboxylic dianhydride (BTDA), 3,4′‐oxydianiline (3,4′‐ODA), and polyaryl polymethylene isocyanate (PAPI) as main materials were first fabricated by liquid foaming and compression molding technology. The effect…
Nonspecific adsorption of proteins on biomaterial surfaces challenges the widespread application of engineered materials, and understanding the impact of secondary structure of proteins and peptides on their adsorption process is of both fundamental and practical importance in bioengineering. In this work, poly-L-lysi…
The aim of this study was to produce a chitosan-crosslinked nanofibrous biodegradable poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) nerve conduit. The artificial scaffold was designed by electrospinning method, and cross-linked with chitosan by chemical method. The scaffolds were evaluated by microscopic, physi…
ABSTRACT HDPE/poly(ethylene‐co‐vinylacetate) (EVA) and low‐density polyethylene (LDPE)/EVA blends were tested and compared with respect to their environmental stress cracking resistance (ESCR) using the Bell‐telephone test. The time to failure in the ESCR test improves with increasing EVA content, and considerable imp…
High-resolution thermal-expansion measurements of single-crystalline CuO (tenorite) are reported for the temperature range $5<T<350$ K. The data reveal three transitions (${T}_{N1}$ $=$ 213 K, ${T}_{N2}$ $=$ 229.2 K, and ${T}_{N3}$ $=$ 229.8 K), which corroborate the recently proposed magnetic phase diagram [Villarrea…
Novel biocompatible polymer immobilized superparamagnetic nanoparticles (MNP) are prepared by grafting four armed pentaerythritol poly(ε-polycaprolactone) (PE-PCL) onto silane modified MNP. The MNPs are synthesized by hydrothermal process and its modification using (3-aminopropyl)trimethoxysilane (TMAS) coating is don…