Materials Literature
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We fabricated ZnO nanowire field effect transistors (FETs) and systematically characterized their low frequency (f) noise properties. The obtained noise power spectra showed a classical 1∕f dependence. A Hooge’s constant of 5×10−3 was estimated from the gate dependence of the noise amplitude. This value is within the…
Silica nanoparticles were synthesized by sol−gel route using a cationic surfactant, tetrabutylammonium bromide (TBAB), as a templating agent and a nonionic surfactant block copolymer [poly(ethylene glycol)- block -poly(propylene glycol)- block -poly(ethylene glycol)] to regulate the silicon oxide grain size. Ferric ox…
Many load-bearing soft tissues exhibit mechanical anisotropy. In order to understand the behavior of natural tissues and to create tissue engineered replacements, quantitative relationships must be developed between the tissue structures and their mechanical behavior. We used a novel collagen gel system to test the hy…
Epitaxial Ba0.7Sr0.3TiO3 (BST) thin films were deposited on various single crystal substrates, including LaAlO3 (LAO) (001), (LaAlO3)0.3(Sr2AlTaO6)0.35 (LSAT) (001), and SrTiO3 (STO) (001), using pulsed laser deposition in order to study their structural and electro-optic properties. All the films exhibit a good cryst…
Experimental tests performed on superelastic shape-memory alloys (SMAs) show a significant dependence of the stress—strain relationship on the loading—unloading rate, coupled with a not negligible oscillation of the material temperature. This feature is of particular importance in view of the use of such materials in…
Advanced composite materials (ACM) have become the basic materials of the aerospace engineering. In this paper, the requirements and the applications of ACM in the aerospace engineering were presented. Some hot-spot technological fields, such as lattice materials and structures, nano-composite materials and multi-func…
A light-induced insulator-to-metal ultrafast phase transition (PT) was observed in $\mathrm{V}{\mathrm{O}}_{2}$ thin films deposited on single-crystal sapphire and amorphous glass substrates. The PT and optical properties of $\mathrm{V}{\mathrm{O}}_{2}$ were characterized by transient reflection, absorption, and trans…
Dy 3 + doped oxyfluoride silicate glass was prepared and its optical absorption, 1.3μm emission, and upconversion luminescence properties were studied. Furthermore, the Judd-Ofelt [Phys. Rev. 127, 750 (1962); J. Chem. Phys. 37, 511 (1962)] intensity parameters, oscillator strengths, spontaneous transition probability,…
The geometric and electronic properties of supported Pt particles have been altered by modifying the ionicity (acid base properties) of the Al 2 O 3 support via the sol−gel method. The Si modifier resulted in the most acidic and Cs in the most basic Al 2 O 3 support. Application of the new Delta XANES technique shows…
Spallation in single crystalline nickel was studied using molecular dynamics simulations. The shock waves—incident waves, the waves reflected from sample free surfaces, and interference between reflected waves—create and destroy many microstructural features. These features, though unimportant in determining the spall…
The strain behavior of morphotropic, 1La2Sr-doped lead zirconate titanate was investigated. Particular attention was paid to the electric field induced strain (S-E characteristic) in the high field range for morphotropic materials having different Zr∕Ti ratios. Unipolar electrical cycles with maximum fields between 1…
The process of rearranging lamella crystal structures in isotactic polypropylene (iPP) and butene randomly copolymerized iPP (bPP) spherulites during hot drawing was investigated by in-situ microbeam small-angle X-ray scattering (SAXS)−wide-angle X-ray scattering (WAXS)−polarized optical microscopy (POM) simultaneous…
For the application of phase change materials in solid state memory devices it is very desirable to modify the crystallization properties such as the crystallization temperature Tx by doping in a predictable fashion. We have applied a model for the calculation of the glass transition temperature Tg of phase change mat…
Lead-free potassium sodium niobate piezoelectric single crystals substituted with lithium 0.95(K0.5Na0.5)NbO3–0.05LiNbO3 have been grown by Bridgman method and their dielectric and piezoelectric properties were studied. The orthorhombic-tetragonal and tetragonal-cubic phase transition temperatures of the single crysta…
We report the first complete determination, using surface x-ray diffraction, of the surface structure of ${\mathrm{TiO}}_{2}$-terminated ${\mathrm{SrTiO}}_{3}(001)$, both at room temperature in vacuum, and also hot, under typical conditions used for thin film growth. The cold structure consists of a mixture of a ($1\i…
Chains and Averages of Polymers: An Overview Introduction How Big is Big? Linear and Branched Polymers and Homo- and Copolymers Addition, Condensation, and Natural Polymers Polymer Nomenclature Positional, Stereo, and Geometrical Isomerism Molecular Weight by End Group Analysis Molecular Weight Averages The Binomial D…
In the present work, nano-ZrO2∕CoSb3 composites were fabricated by milling ZrO2 and CoSb3 powders and hot pressing at different sintering temperatures. For the prepared compacts, the phase purity, microstructure, and temperature-dependent thermoelectric properties were characterized. The effect of nano-ZrO2 dispersion…
Ternary and quaternary cubic c-AlxIn1-xN/GaN and c-AlxGayIn1-x-y/GaN heterostructures lattice-matched to c-GaN on freestanding 3C-SiC substrates were grown by plasma-assisted molecular beam epitaxy. The c-AlxGayIn1-x-y alloy permits the independent control of band gap and lattice parameter. The ternary and quaternary…
Direct identification of the glass transition: Growing length scale and the onset of plasticity, Aharonov, E., Bouchbinder, E., Hentschel, H. G. E., Ilyin, V., Makedonska, N., Procaccia, I., Schupper, N.
A perylene bisimide derivative bearing two phenyl substituents with chiral solubilizing alkyl chains at the imide N atoms has been synthesized, and its self-assembly properties in solution and condensed phase have been investigated. Temperature-dependent CD spectra revealed the coexistence of two different kinds of ch…