Materials Literature
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We report magnetic and magnetocaloric properties of Sm0.6-xLaxSr0.4MnO3 (x = 0-0.6). A rapid increase around TC and an anomalous peak at a temperature T*<
The electron-electron mutual Coulomb repulsion energy density functional satisfies an equation that links functionals and functional derivatives at N-electron and (N-1)-electron densities for densities determined from the same adiabatic scaled external potential for the N-electron system.
Bioremediation is an important approach to waste reduction that relies on biological processes to break down a variety of pollutants. This is made possible by the vast metabolic diversity of the microbial world. To explore this diversity for the breakdown of plastic, we screened several dozen endophytic fungi for thei…
Abstract The synthesis of silsesquioxane oligomers containing amino and phenyl groups by sol–gel process and the formation of an organic–inorganic hybrid, by the reaction of amino groups of the silsesquioxane precursor with epoxy rings of diglycidyl ether of bisphenol A, have been investigated. Acid catalysis proved t…
The near-field electron beam induced current technique is used to study the minority carrier effective diffusion length versus electron beam energy on structures containing spherical Ge nanocrystals (NCs) with diameters of 50 nm and 70 nm formed by a two step dewetting/nucleation process. For both nanocrystal sizes, t…
This paper gives an assessment of vertically aligned carbon based varactors and validates their potential for future applications. The varactors discussed here are nanoelectromechanical devices which are based on either vertically aligned carbon nanofibers or vertically aligned carbon nanotube arrays. A generic analyt…
The compound 1,3-2,4-di(p-hydroxyl) benzylidene sorbitol, acted as an effective nucleating agent, was synthesized by acetal method from p-hydroxyl benzaldehyde and D-sorbitol. The influence of nucleating agent concentration on crystallization morphology and mechanical properties of isotactic polypropylene (IPP) was in…
Single crystals of the recently found superconducting system Ca–Fe–Pt–As have been prepared and used in X-ray Rietveld analyses, where we have identified two types of structure; SrZnBi 2 type (type A; I 4/ m m m ) and HfCuSi 2 type (type B; P 4/ n m m ). Both structures consist of Fe 1- x Pt x As conducting layers wit…
We fabricate a heterostructure of SmNiO3 and VO2 on silicon wherein both correlated oxides undergo a metal-insulator transition at different threshold temperatures. It is demonstrated that the threshold voltage for electrically switching the VO2 from insulating to metallic can be tuned depending on the conducting stat…
Abstract The catalytic activity of Co 3 O 4 catalyst was examined in a differential reactor for converting NO to NO 2 and N 2 O. It was observed that mostly NO was oxidized to NO 2 rather than N 2 O over the catalyst at temperatures above 250°C in the presence of 5% oxygen and 10% water. The maximum conversion was 71%…
The geometrical structures and vibrational spectra of both the (4,4) single-walled silver nanotube and the stretched one-lattice-parameter-wide fcc Ag nanowire, found in a recent experiment [Nature Nanotechnology 4, 149 (2009)], have been investigated by the density-functional theory calculations within the generalize…
The static director distribution in thin nematic liquid crystal cells, subject to both electric and magnetic fields, has been investigated using a combination of deuterium nuclear magnetic resonance (NMR) spectroscopy and continuum theory in terms of the director distribution function, which gives the probability dens…
Presented here are the results of Rietveld analysis of powder neutron diffraction data, which reveal that both the ferroelectric and antiferrodistortive phase transitions occur together at T ∼ 925 K during heating, leading to a change in crystal structure from room temperature rhombohedral phase in the R3c space group…
A guanidinium compound, [C(NH(2))(3)](5)SO(4)(SO(3)-OC(2)H(5))(2)F, with complex anionic sublattice has been synthesized and characterized by calorimetric and dielectric measurements at ambient and high hydrostatic pressures, as well as by single-crystal X-ray diffraction at varied temperatures. At room temperature, t…
Abstract The objective of this study was to determine the mechanical and viscoelastic properties of extruded cylindrical strands from biodegradable polymer blends and to verify the correlation of the blend properties with their capacity to form films in the blown extrusion process. The production of biodegradable film…
The influence of carbon nanotube geometry and morphology on complex permittivity (both ɛ′ and ɛ″) was investigated. In a dilute complex system, it was found that single walled carbon nanotubes (SWNTs) composites can obtain a higher relative dielectric permittivity due to the largest length/diameter aspect ratio (A. R.…
Self-formation of the surface protective layer on dilute CuAl alloys by annealing in inert atmospheres is investigated with thermodynamic consideration, first principles density functional simulation, and transmission electron microscopy (TEM). The calculations predict that when Cu atoms are involved in the surface Al…
Lanthanum strontium manganite La 0.7 Sr 0.3 MnO 3 thin films have been grown successfully on Si(001) by metal‐organic chemical liquid deposition technique using acetate as the starting materials, and acetic acid and deionized water as the solvent. Crack free, low surface roughness, preferential orientation films with…
We present a rigorous comparison between resistivity data and theoretical predictions involving the theory of Palasantzas [G. Palasantzas and J. Barnas, Phys. Rev. B 56, 7726 (1997)], and the modified Sheng, Xing, and Wang-fractal theory [R. C. Munoz et al., Phys. Rev. B 66, 205401 (2002)], regarding the resistivity a…
10.1209/0295-5075/95/34004