Materials Literature
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In this work, we investigate the detailed theory of the supercoupling, anomalous tunneling effect, and field confinement originally identified by Silveirinha and Engheta [Phys. Rev. Lett. 97, 157403 (2006)], where we demonstrated the possibility of using materials with permittivity $\ensuremath{\epsilon}$ near zero to…
We have recently introduced a new method of creating ultrathin films [1–3] based on the electrostatic attraction between opposite charges. Consecutively, alternating adsorption of anionic and cationic polyelectrolytes leads to the formation of multilayer assemblies. Multilayer buildup is easily monitored by small angl…
Crop K requirement under negative soil K balance due to imbalanced NPK fertilization in intensive cropping system is mainly met through potassium released from non-exchangeable sources. Efforts were made to study the effects of recommended levels of N and P with or with out K fertilizers on K balance, contribution and…
Tert-butyldimethylsilyl cellulose with a degree of substitution (DS) of up to 2 could be obtained by homogeneous conversion of the biopolymer with tert-butyldimethylchlorosilane in N,N-dimethyl acetamide/LiCl in the presence of imidazole. The cellulose derivatives were characterized in detail by means of two-dimension…
Recently, it has been shown that magnetic tunnel junctions with thin MgO tunnel barriers exhibit extraordinarily high tunneling magnetoresistance (TMR) values at room temperature1, 2. However, the physics of spin dependent tunneling through MgO barriers is only beginning to be unravelled. Using planar magnetic tunnel…
Nonlinear transmission of 80 and 140 femtosecond pulsed light with $0.79 μm$ wavelength through single walled carbon nanotubes suspended in water containing sodium dodecyl sulphate is studied. Pulse-width independent saturation absorption and negative cubic nonlinearity are observed, respectively, in open and closed a…
We present a complete prescription for the numerical calculation of surface Green's functions and self-energies of semi-infinite quasi-onedimensional systems. Our work extends the results of Sanvito et al. [1] generating a robust algorithm to be used in conjunction with ab initio electronic structure methods. We perfo…
ADVERTISEMENT RETURN TO ISSUEPREVNoteSynthesis and Characterization of Silklike Materials Containing the Calcium-Binding Sequence from Calbindin D9k or the Shell Nacreous Matrix Protein MSI60Mingying Yang†, Tomoko Muto†, David Knight‡, Andrew M. Collins§, and Tetsuo Asakura*†View Author Information Department of Biote…
We have performed density functional theory simulations applied to slabs to study the dehydrogenation of ammonia on the surface of clean and atomic oxygen or hydroxyl precovered Au(111). Ammonia does not dissociate unimolecularly on the surface and needs a proton scavenger to drive decomposition. O atoms or hydroxyl g…
The binary lanthanide hydride clusters Ln 3 H 9 and Ln 4 H 12 (Ln = La, Gd, and Lu) were predicted theoretically to exist, their formation being thermodynamically favorable. They make a link between the widely studied small molecules and bulk solids of binary lanthanide hydrides. The cyclic pentacoordinated Ln 3 H 9 w…
Yttria-stabilized zirconia (YSZ) ceramic is considered as an attractive material for solid oxide fuel cells or for nuclear applications such as inert matrix for the destruction of excess plutonium and host material for nuclear waste storage. Long-term properties such as phase stability depend on cation diffusion. Ther…
The concentration-dependent surface-enhanced Raman scattering (SERS) study of the biologically important, 2-amino-2-thiazoline (2ATH) molecule adsorbed on silver nanocolloids has been investigated. The SERS spectra of the molecule at different adsorbate concentrations are compared with its FTIR spectrum and normal Ram…
The rod orientation and crystalline packing of a model semiconducting rodlike polymer, poly(2,5-di(2‘-ethylhexyloxy)-1,4-phenylenevinylene) (DEH−PPV), is shown to affect the self-assembly of weakly segregated rod−coil block copolymers. The in-plane packing of DEH−PPV rods in lamellar poly(2,5-di(2‘-ethylhexyloxy)-1,4-…
An open-framework indium selenide, [C7H10N][In9Se14], has been prepared under solvothermal conditions in the presence of 3,5-dimethylpyridine and characterized by single-crystal X-ray diffraction, thermogravimetry, elemental analysis, Fourier tranform IR spectroscopy, and UV-vis diffuse reflectance. The crystal struct…
Abstract The effect of surface roughness on the internal fluidity of a water droplet during sliding on an inclined Si surface treated fluoroalkylsilane (FAS) was investigated using particle image velocimetry (PIV). A water droplet slid down by caterpillar-like rotation flow with or without slippage on the solid–liquid…
Li 2 NH hollow nanospheres were prepared by plasma metal reaction based on the Kirkendall effect. In this synthesis, the bulk lithium was vaporized and reacted with ammonia to obtain the hollow nanostructure directly. The electron microscopy results suggested that more than 90% of the obtained hollow nanospheres were…
A study on the mechanisms for embrittlement of polyamide-6 (PA-6) by nanometer-sized clay in nanocomposites is reported in this paper. Tensile modulus and yield strength in these composites were found to increase with clay concentration, while the strain at rupture decreased. Similar to the strain at rupture, fracture…
Thin films of the polysaccharide chitosan and several chitosan derivatives, including conjugates of l-cysteine, thioglycolic acid, and 2-iminothiolane, were produced from dilute acidic solutions. Attempts to produce a fourth conjugate using lipoic acid resulted in the synthesis of partially N-acetylated chitosan ethan…
State-average complete active space self-consistent field (SA-CASSCF) calculations are performed on the energetically lowest two electronic states of a novel alkyl-substituted 4-quinopyran twisted pi-system electro-optic chromophore. In the gas phase, the ground-state electronic configuration is diradicaloid (D), and…
Stimuli-responsive polymers are of crucial importance in the design of smart biomaterials. The thermo-responsive triblock copolymers of polycaprolactone (PCL) and poly( N-isopropylacrylamide) (P(NIPAAm)), or P(NIPAAm)- b-PCL- b- P(NIPAAm) copolymers, were synthesized in this work via atom transfer radical polymerizati…