Materials Literature
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We simulate competitive two-component growth on a one dimensional substrate of $L$ sites. One component is a Poisson-type deposition that generates Kardar-Parisi-Zhang (KPZ) correlations. The other is random deposition (RD). We derive the universal scaling function of the interface width for this model and show that t…
Recent experiments in La$_{1-x}$Ba$_x$MnO$_3$ thin films by Zhang {\it et al.} {[Phys. Rev. B {\bf 64}, 184404 (2001)]} showed that the ferromagnetic Curie temperature $T_c$ is enhanced (reduced) by tensile (compressive) strain. The results are regarded to be anomalous because it is generally understood by the authors…
We report the first atomistic calculation of the saddle-point configuration and activation energy for the nucleation of a 3D dislocation loop from a stressed crack tip in single crystal Cu. The transition state is found using reaction pathway sampling schemes, the nudged elastic band, and dimer methods. For the (111)[…
This paper investigates the application of a supercapacitor bank when used as a power buffer to smooth rapid power fluctuations in and out of the battery of an electric or hybrid vehicle. The study considers the simple case where the supercapacitor bank is connected directly in shunt with the battery as well as the ca…
In order to further increase the recording density in hard disk drives, new media materials are required. Two essential parameters of future recording media are a large uniaxial magnetic anisotropy energy (MAE) K(u) and a large saturation magnetization M(s). Based on first-principles theory, we predict that very speci…
Cellulose cotton linter was oxidized with sodium hypochlorite with catalytic amounts of sodium bromide and 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) under various conditions. After this TEMPO-mediated oxidation, water-insoluble fractions were collected and characterized in terms of carboxylate and aldehyde…
Cable joints and terminations represent the weakest components of a HV cable power line because of the electric field enhancement at the edge of the truncated conductors and dielectrics. This paper deals with the distribution of the electric field in a cable termination. A numerical model is devised by solving Maxwell…
Abstract The angular distributions of protons travelling through thin polycrystalline gold targets (∼15 nm) with incident energies in the range of 4–10 keV have been measured. The results confirm previous experiments at higher energies showing deviations from theoretical predictions based on the standard multiple scat…
Abstract Summary: Poly(acryloamidino ethyleneamine) (PAEA) and poly(acryloamidino diethylene diamine) (PADD) have been synthesized for the observation of Cu II complex and Cu(OH) 2 crystal‐growth on the surface of different numbers of amino groups immobilized on polyacrylonitrile (PAN) fibers. The shape of Cu II cryst…
Molecular oxygen has been found to be easily adsorbed on the partially hydrogenated diamond C(100)-(2×1):H surfaces, whereas the clean and fully hydrogenated C(100) surfaces are completely inert to molecular oxygen. The partially hydrogenated diamond C(100)-(2×1) surfaces have been prepared by (i) in situ hydrogen pho…
Brillouin scattering in liquids composed of optically and mechanically anisotropic molecules is affected by coupling between rotational and translational dynamics. While this effect has been extensively studied in depolarized (VH) scattering where it produces the "Rytov dip," recent theoretical analyses by Pick, Frano…
1-Acyldipyrromethanes are important precursors in rational syntheses of diverse porphyrinic compounds. 1-Acyldipyrromethanes are difficult to purify, typically streaking upon chromatography and giving amorphous powders upon attempted crystallization. A solution to this problem has been achieved by reacting the 1-acyld…
Direct growth of individual and vertically aligned carbon nanotubes (CNTs) onto a metallic tip apex using a two-chamber radio-frequency plasma-enhanced chemical vapor deposition is reported. Individual Ni nanocatalysts, obtained by a sol–gel combustion technique, were dots for the nucleation of individual CNTs that we…
Our theory of dynamic barriers, slow relaxation, and the glass transition of polymers melts is numerically applied using parameters relevant to real materials. The numerical results are found to be in qualitative agreement with all the approximate analytic expressions previously derived with quantitative differences o…
Pb 0.3 Sr 0.7 TiO 3 ( PST 30 ) thin films were synthesized on platinized silicon (Pt∕Si) and lanthanum aluminate (LAO) substrates using chemical solution deposition technique. The films on LAO substrate were highly (100) oriented, whereas the films on Pt∕Si substrate were polycrystalline. The low dielectric loss in th…
The energy barrier for hydride transfer in wild-type G121V and G121S variants of Escherichia coli dihydrofolate reductase (DHFR) fluctuates in a time-dependent manner. This fluctuation may be attributed to structural changes in the protein that modulate the site of chemistry. Despite being far from the active site, mu…
Reaction of the preorganized strands of ([Cu(II)(mu-4,4'-bpy)](2+))n (4,4'-bpy = 4,4'-bipyridine) with [W(V)(CN)(8)](3)(-) leads to a novel cyano-bridged Cu(II)(3)W(V)(2) complex [Cu(mu-4,4'-bpy)(DMF)(2)][Cu(mu-4,4'-bpy)(DMF)](2)[W(V)(CN)(8)](2).2DMF. 2H(2)O 1. The structure of 1 consists of the expected 2-dimensional…
The evolution of the degree of substitution during the transformation of both amorphous and crystalline domains of cellulose during carboxymethylation in systems consisting of ethanol/benzene mixtures is properly described by a pseudo-first-order kinetic equation with a higher reaction rate for less ordered regions. I…
We present monolithically integrated high-density arrays of artificial hairs for flow pattern measurements based on drag force. A combined bulk/surface micromachining process has been developed to integrate the artificial hairs with capacitive read-out. First fabrication results show the possibility to fabricate out-o…
According to SECA program guidelines, solid oxide fuel cells (SOFC) are produced in the form of 3-10 kW modules for residential use. In addition to residential use, these modules can also be used in apartment buildings, hospitals, etc., where a higher power rating would be required. For example, a hospital might requi…