Materials Literature
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This paper presents the control performance of a novel type of single-link mechanism activated by shape memory alloy (SMA) springs. After briefly describing the configuration of the proposed mechanism, the governing equation of motion is derived using a Lagrangian equation. The actuator dynamic of the SMA spring is th…
In Brief Piezoelectric sensors have been shown to respond reproducibly to changes in tissue mechanical properties surrounding an implant over a 4-month period. The vibrational amplitude at a frequency corresponding to the radial resonance shows a statistically significant change over time. The initial period of inflam…
A simple form of a SPICE macro model for a generic phase-change random access memory device is presented. The approach is based upon lumped parameter multiple level models. The SPICE implementation is described using a series of increasingly complex modeling blocks for dc to transient analysis. The effect of nonlinear…
The reliability of the Derjaguin approximation for the calculation of the mixing term between sterically stabilized colloidal particles is studied. For this purpose, the steric potential obtained from the experiment of Doroszkowski and Lambourne [J. Polym. Sci., Part C: Polym. Symp. 34, 253 (1971)] is regarded as an e…
The adsorption behavior of PHB depolymerase from R. pickettii T1 on a silicon wafer and on P(3HB) single crystals has been studied by real-time and AFM in air and a buffer solution. First, the morphology of PHB depolymerase adsorbed on a silicon wafer was characterized to show that one molecule of PHB depolymerase has…
Abstract Summary: Interfacial adhesion between fibers and matrix is a crucial factor for effective stress transfer from matrix to fiber; especially in short fiber reinforced composite systems. The use of a chemical compatibilizer is an efficient means to achieve such adhesion. Maleic anhydride‐grafted‐cellulose acetat…
Wave-function-based ab initio calculations on the lowest states of the 4f(n),4f(n-1)5d(t2g)1, and 4f(n-1)5d(e(g))1 configurations of (LnCl6)3- clusters (Ln=Ce to Tb) embedded in the cubic elpasolite Cs2NaYCl6 have been performed, in an attempt to contribute to a comprehensive understanding of the 4f-->5d excitations o…
Pseudoelasticity of shape-memory alloys has been commonly associated with reversible austenite-martensite phase transformation characterized by diffusionless, shear-induced atomic rearrangement. In situ heating nanoindentation and transmission electron microscopy results of this study demonstrate that martensitic TiNi…
Vanadium oxide was deposited on mesoporous titania by the molecular designed dispersion method to investigate the potential properties of these catalysts. Mesoporous titania was synthesized following the evaporation-induced self-assembly (EISA) method with a subsequent treatment with ammonia to increase the thermal st…
A development is presented that allows the simulation of reciprocal-space maps (RSMs) of epitaxic thin films exhibiting fluctuations in the size and shape of the crystalline domains over which diffraction is coherent (crystallites). Three different crystallite shapes are studied, namely parallelepipeds, trigonal prism…
It has been shown by several groups that the mechanical and electrical behavior of composites changes quite substantially, and often beneficially, when the filler particle size is less than 100 nm in diameter. There is also good reason to believe that the interface between the embedded particulates and the polymer mat…
For brittle cleavage under Load Mode I, a model for single crystals is presented which derives the critical stress in terms of the cleavage energy and the uniaxial elastic modulus. The model parameters are determined by fitting to results of ab initio density functional calculations. The crucial concept for establishi…
CO adsorption on NO(2)-predosed Au[111] reveals an unexpected attractive coadsorbate interaction, associated with an unprecedented blueshift of the CO stretch frequency, a sizeable attenuation of the infrared NO(2) symmetric stretch band, and a (sq.rt(7) x sq.rt(7))R19 degrees structure characterized by scanning tunne…
X-ray diffraction patterns of NiPc in powder form show that it has a β-form with monoclinic structure. The thermal evaporation of NiPc led to α-polycrystalline films orientated preferentially to the (001) plane with an amorphous background. After annealing at 573 K for 2 h, a mixture of α- and β-phases was formed, whi…
Abstract Summary: Polyaniline composite film with nano‐structure was prepared through a chemical oxidation method by adding carbon nanotubes (CNTs) as nano‐fiber seeds. Spin‐coating or casting method was employed on the interdigital electrodes of carbon and the composite film was formed with an in‐situ polymerization…
Specific heat of stoichiometric ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3}$ samples with large ($x=1.0$, 0.9, 0.7, 0.55, 0.45) and low $(x=0.0)$ strontium contents was measured from 3 to 393 K, on heating and on cooling, in zero magnetic field and in the field of 7 T. The temperatures and the…
We have investigated the structural and dynamic properties of liquid nickel by means of large-scale molecular-dynamics simulations, using an effective-pair potential derived from the second-order pseudopotential perturbation theory. The model of interactions is assessed on the single-atom as well as collective dynamic…
We present a simple model to describe the induction of magnetic behavior on gold clusters upon chemisorption of one organic molecule with different chemical linkers. In particular, we address the problem of stability of the lowest lying singlet and show that for some linkers there exists a spin symmetry-breaking that…
Resistance to partial discharge (PD) was investigated for four kinds of epoxy nanocomposites, an epoxy resin without fillers, and an epoxy resin with SiO/sub 2/ micro-filler. The nano-fillers used were TiO/sub 2/, two different particle sizes of SiO/sub 2/, and layered silicate. Filler content was 5 wt % in all nano-…
We describe photoinduced formation of blue fluorescent aggregates of azobenzene derivatives, whose isolated molecules in solution are not fluorescent at ambient temperature, with different alkyl chain lengths. In contrast to nonfluorescent C0 (4-hydroxyazobenzene), C10 and C24 with long alkyl chains started being blue…