Materials Literature
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The titanium tantalum oxide, TiTaO, was fully characterized in situ in an integrated metal–insulator–metal (MIM) configuration on a wide frequency band, from 1 mHz to 30 GHz. First, XPS and XRD analysis show that TiTaO dielectric is amorphous and presents Ti-O, Ta-O, and Ti-Ta bounds. Next, by using dedicated MIM test…
Lead-free (Na0.5K0.5)NbO3 (NKN) ceramics doped with 1 mol% CuNb2O6 (01CN) ceramics were prepared using the conventional mixed oxide method at a sintering temperature of 1075 °C. NKN + 1 mol% CuTa2O6 (NKN-01CN) ceramics sintered at 1075 °C exhibit excellent “hard” piezoelectric properties of kp = 40%, kt = 45%, and k33…
The plasmon energy of the solid and liquid phases of pure Al, and an Al-Si alloy, was recorded as a function of temperature. For the case of pure Al, the trend in the solid and liquid phases followed the expected behavior based on a free (specific) volume change. Quantitatively, the slope of Ep versus T was −0.5 meV/K…
We applied anisotropic stress to LaMnO3+δ nanoparticles synthesized in one-dimensional pores of mesoporous silica and investigated the effects of the anisotropic strain on the nanoparticles, which consisted of ferromagnetic and antiferromagnetic particles. The nanoparticles in the one-dimensional pores were crushed wi…
The effects of electroplating chemistry and dielectric diffusion barrier composition on copper voiding and barrier adhesion are reported. Adhesion was quantified using the four-point bend thin film adhesion technique, and voiding in the Cu films was quantified using scanning electron microscopy. A total of 12 differen…
Ethylene–propylene–diene monomer (EPDM) rubber/samarium borate (SmBO 3 )/ethylene acrylic acid (EAA) and EPDM/sb in Sb-doped SnO 2 (antimony tin oxide)/EAA composites are aged at 150°C for different intervals. It is found that alkaline SmBO 3 can lower the oxidation rate of EPDM composites by scavenging acids formed d…
The dynamic responses of nematic liquid crystals in a parallel-plate cell under the application of electric fields were investigated using three-dimensional molecular dynamics simulations, which should provide more precise dynamics as compared to those in two-dimensional molecular dynamics simulations as in our previo…
ABSTRACT This paper presents an experimental and numerical investigation of the effects of intumescent coating and nanoparticles on the burning behaviors of flaxboard. Virgin flaxboard samples and those coated with intumescent coatings (with/without nanoparticles) were tested in the cone calorimeter and single burning…
Pentagonal conjugates of tryptophane zipper-forming peptide (CKTWTWTE) with a pentaazacyclopentadecane core (Pentagonal-Gly-Trpzip and Pentagonal-Ala-Trpzip) were synthesized and their self-assembling behaviors were investigated in water. Pentagonal-Gly-Trpzip self-assembled into nanofibers with the width of about 5 n…
Hyperbranched polymers are synthesized via a cobalt(II) mediated emulsion copolymerization of methyl methacrylate and diethylene glycol dimethacrylate. The concentration of divinyl monomer and chain transfer activity have to be balanced in order to prevent gelation of the polymer particles. The physiochemical properti…
We have investigated the O 2 molecular and dissociative adsorption on Ag(111) surfaces. To clarify the adsorption properties, we performed first principles calculation based on spin-polarized density functional theory (DFT) with the generalized gradient approximation for the exchange–correlation energy. We calculated…
Microscale 1-3-type-like magnetoelectric (ME) composites with ferromagnetic microstrips laterally embedded in a piezoelectric ceramic substrate were fabricated by a dice-and-insert method. Mechanically sliced microstrips of Li/Ta-modified (K,Na)NbO3 lead-free ceramics and CoFe2O4 ceramics were used as the piezoelectri…
A GaAs monolithicK-band left-handed frequency multiplier based on a composite right/left-handed coplanar-waveguide transmission line (TL), periodically distributed series planar Schottky varactor diode, and shunt rectangle spiral inductor has been successfully designed and fabricated. The anomalous dispersion of the l…
This study achieved a substantial enhancement in electroluminescence by coupling localized surface plasmons in a single layer of Ag nanoparticles. Thermal evaporation was used to fabricate 20-nm Ag particles sandwiched between a gallium-doped zinc oxide film and a glass substrate to form novel window materials for use…
Arc discharge is one of the widely utilized methods for synthesis of different carbon nanostructures, including carbon nanotubes and graphene, due to its high-quality product and ecofriendly processes. This paper presents the results on arc controllability during the synthesis by means of external magnetic field, whic…
Polar GaN(0001¯) (1×1), semipolar GaN(101¯3) surfaces prepared in NH3 vapor, and their disordered counterparts are investigated by reflection electron energy loss spectroscopy (REELS) and low-energy electron diffraction. The REELS spectra are measured in a range of polar angles at electron kinetic energies of 200 and…
Dielectric relaxation and magnetodielectric (MD) effects were observed in 0.36BiScO3-0.64PbTiO3/La0.7Sr0.3MnO3 thin films. The universal dielectric response and distribution of relaxation time modifications were introduced into the Maxwell-Wagner (MW) model. Based on modified MW model, the negative MD response at low…
Dendrons of pyrene derivatives were attached to a porphyrin core. A marked effect in solution for the dendrimers was observed in the absorption spectra. All the compounds obtained were characterized by (1)H-, (13)C-NMR, FTIR, UV-vis, MALDI-TOF or FAB+ mass spectrometry and elemental analysis. The cubic nonlinear optic…
A quasiperiodic intermediate-valence system was prepared by applying pressure to an icosahedral Cd-Mg-Yb quasicrystal. X-ray absorption spectroscopy near the Yb ${L}_{3}$ edge demonstrates that the Yb valence increases continuously upon compression from the divalent state ($4{f}^{14}$) at ambient pressure and reaches…
Carbon fiber surface energy is calculated using molecular mechanics simulations on the basis of variation in nonbond energy of carbon fiber due to the presence of various functional groups i.e., OH, CO, and COOH. A step-wise methodology is adopted so that optimized graphite models are used to build separate models of…