Materials Literature
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For classical elasticity, the constitutive equations (Hooke’s law) have the same functional form for both homogeneous and nonhomogeneous materials. However, for strain-gradient elasticity, such is not the case. This paper shows that for strain-gradient elasticity with volumetric and surface energy (Casal’s continuum),…
Application of polynuclear metal clusters for phasing X-ray crystal structures of macromolecules is discussed. Their strong isomorphous and anomalous scattering signal is particularly useful for phasing structures of large macromolecules and complexes, especially at low resolution. The popularity of the metal clusters…
Abstract Magnetic crystals were formed using supramolecular cation structures that consist of ( S )‐AIH + (dibenzo[18]crown‐6), ( R )‐AIH + (dibenzo[18]crown‐6), or ( RS )‐AIH + (dibenzo[18]crown‐6) (AIH + = indan‐1‐aminium) as the counter cation to [Ni(dmit) 2 ] – ions (dmit 2– = 2‐thioxo‐1,3‐dithiole‐4,5‐dithiolate)…
The ideal torsional strengths of a class of carbon nanotubes, and the torsional stiffnesses of all carbon nanotubes are computed using a novel combination of an ab initio electronic structure total energy technique and a physically motivated scaling form. The specific torsional strengths of multi-walled tubes are pred…
The quality of life of patients who wear an orbital prosthesis would be vastly improved if their prostheses were also able to execute vertical and horizontal motion. This requires appropriate actuation and control systems to create an intelligent prosthesis. A method of actuation that meets the demanding design criter…
Heterophasic propylene−ethylene copolymers (HPEC) containing 1 wt % bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (Tinuvin 770) as a hindered amine stabilizer (HAS) were aged by exposure of ≈3 mm thick plaques to UVA and UVB sources in weathering chambers at 318 K. Two types of copolymers, HPEC1 and HPEC2, were exam…
Preparation of a nearly stoichiometric $\mathrm{Mg}[{\mathrm{Ti}}_{2}]{\mathrm{O}}_{4}$ spinel with a transition at ${T}_{t}=260\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ has been accomplished by solid-state reaction. Schmidt et al. [Phys. Rev. Lett. 92, 056402, 2004] have shown a tetragonal $(c∕a<1)$-cubic transition…
We investigate a thin Sn film grown at elevated temperatures on the fivefold surface of an icosahedral $\mathrm{Al}\mathrm{Cu}\mathrm{Fe}$ quasicrystal by scanning tunneling microscopy (STM). At about one monolayer coverage, the deposited Sn is found to form a smooth film of height consistent with one-half of the la…
PURPOSE: In vitro evaluation of labeling efficiency of human mesenchymal stem cells (hMSCs) with different types of superparamagnetic iron oxide nanoparticles as well as detection and quantification by MRI at 3T. MATERIAL AND METHODS: hMSCs were incubated for 24 hours with 5 ultrasmall superparamagnetic particles of i…
The ferromagnetic state of thin ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$ layers ($d=300\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$; $x=0.014$, $p=6.7\ifmmode\times\else\texttimes\fi{}{10}^{19}\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}3}$, ${T}_{C}=40\phantom{\rule{0.3em}{0ex}}\mathrm{K}…
We have performed numerical calculations and experimental studies on the dipole-dipole interaction in the hexagonal nanowire arrays. Using the dipole approximation with a length correction, the dipolar fields in the cylindrical wire arrays were calculated. By means of M\"ossbauer spectroscopy, the dipolar fields in th…
The synthesis of two chiral isomers of 3-substituted polythiophenes, with cationic side-chain functionalities, and their use as conformational sensitive optical probes for the recording of pH-induced conformational changes in a synthetic peptide are reported. The conformational changes of the synthetic peptide gives r…
This contribution describes the synthesis of gold nanorod (Au NR)/single-wall carbon nanotube (SWCNT) heterojunctions assembled directly on Si/SiOx substrates. SWCNTs are attached to amine-functionalized Si/SiOx substrates, and Au monolayer-protected clusters (MPCs) are adsorbed to the surface of SWCNTs through hydrop…
Ba 0.96 Ca 0.04 Ti 0.84 Zr 0.16 O 3 (BCTZ) and Ba0.5Sr0.5TiO3 (BST) thin films were deposited at a substrate temperature of 450°C via rf magnetron sputtering to form Pt∕BCTZ∕Pt and Pt∕BST∕Pt capacitors. BCTZ thin films hold promise as an alternative to BST in capacitor applications due to the resistance of BCTZ to red…
Faraday rotation in the terahertz frequency range was observed in molecular magnetic systems. The effect is strongest near the magnetic resonance of the single molecule magnet ${\mathrm{Mn}}_{12}\mathrm{Ac}$ at $\ensuremath{\nu}=300\phantom{\rule{0.3em}{0ex}}\mathrm{GHz}$, where the Faraday rotation exceeds $150\ifmmo…
Abstract Al(OH) 3 as flame retardant and smoke suppressant for flexible poly(vinyl chloride) was evaluated alone and with ZnO, using thermal analytical techniques, limiting oxygen index and smoke density rating tests. The thermal behavior and flammability of the samples treated with Al(OH) 3 and ZnO were studied by di…
We perform molecular dynamics simulations of a one-component glass-forming liquid and use the inherent structure formalism to test the predictions of the Adam-Gibbs (AG) theory and to explore the possible connection between these predictions and spatially heterogeneous dynamics. We calculate the temperature dependence…
Abstract The effect of nucleating agents on the polymorphic crystallization behavior of poly(butylene adipate) (PBA) was studied with four kinds of commercially available nucleating agents, such as talc and boron nitride. The crystal structures of the α and β forms were studied with wide‐angle X‐ray diffraction. The β…
We predict the appearance of a uniform magnetization in strained three-dimensional $p$-doped semiconductors with inversion symmetry breaking subject to an external electric field. We compute the magnetization response to the electric field as a function of the direction and magnitude of the applied strain. This effect…
In 1996, R. T. K. Baker, and N. M. Rodriguez claimed to have synthesized a new type of carbon nanofiber material capable of storing large amounts of hydrogen at room temperature and pressures above 100 bar, thus making it a powerful candidate for a very efficient energy storage system in mobile applications. Consequen…