Materials Literature
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We calculate the microwave conductivity of a two band superconductor with ${s}^{\ifmmode\pm\else\textpm\fi{}}$ gap symmetry. Inelastic scattering is included approximately in a BCS model augmented by a temperature-dependent quasiparticle scattering rate assumed, however, to be frequency independent. The possibility th…
Cu-catalyzed carbon nanofibers are investigated by means of transmission electron microscopy. Straight and helical carbon nanofibers are observed to connect to the catalyst particles of octahedron or triangular prism in the samples prepared using the same processing conditions. Statistic analysis of the results leads…
Photoconductive semiconductor switches (PCSSs) based on ZnO nanobelts film and ZnO thin film were fabricated and applied into a test circuit to control the circuit state. The photosensitivity, leakage current from I-V characteristics, and the “on-off” voltage ratio from voltage spectrums of the former are 102 times hi…
We study the properties of gold contacts on chemically derived graphene devices by scanning photocurrent microscopy and gate-dependent electrical transport measurements. In the as-fabricated devices, negligible potential barriers are found at the gold/graphene interface, reflecting the noninvasive character of the con…
Quantum dots (QDs) and Fe3O4 nanoparticles were conjugated onto the surfaces of carbon nanotubes (CNTs) for medical diagnosis and treatment. The nanoassembly was designed to meet the specific needs in cancer in vivo imaging and simultaneous treatment. The key functionalities needed for clinical applications were integ…
The 2-carboxybenzaldehyde-2,4-dinitrophenyl hydrazone (C 14 H 10 N 4 O 6 , H 2 L) was prepared by condensation of 2-carboxybenzaldehyde with 2,4-dinitrophenyl hydrazine in absolute alcohol. Thirteen novel complexes were synthesized from the reaction of H 2 L with RE(NO 3 ) 3 · 6H 2 O(where RE = La, Ce, Pr, Nd, Sm, Eu,…
The current review summarizes the data of saturated vapor pressure and thermodynamic parameters of the sublimation process of different phthalocyanines as reported in the literature as well as in our work. The volatility of phthalocyanines is analyzed from the standpoint of their molecular and crystal structure. The d…
A series of novel imide-containing phthalonitrile polymers with flexible aryl ether units have been synthesized and characterized. Bisphenol monomers were synthesized by a multi-step synthesis involving a condensation reaction between aromatic aldehydes and 2,6-dimethyl phenol, respectively. The bisphenols obtained we…
MIPS (metal interactions in protein structures) is a database of metals in the three-dimensional macromolecular structures available in the Protein Data Bank. Bound metal ions in proteins have both catalytic and structural functions. The proposed database serves as an open resource for the analysis and visualization o…
The knowledge of the depth concentration profile of thin-layered surfaces a few nanometers thick is very important for research and applications in microelectronics, corrosion, wear, and tribology. In-depth profiling methods reported in the literature are either destructive (ion sputtering), based on severe approximat…
The optical properties of carbon nanotubes strongly depend on the polarization direction of the incident light. The challenge of describing the optical properties analytically is mainly associated with the calculation of dipole matrix elements. Although an analytic expression has been obtained for dipole matrix elemen…
Less-comon nanostructures (nanoforms) such as “nanodumbbells”, “nanorices”, “nanolines”, “nanotowers”, “nanoshuttles”, “nanobowlings”, “nanowheels”, “nanofans”, “nanopencils”, “nanotrees”, “nanoarrows”, “nanonails”, “nanobottles”, or “nanovolcanoes”, among many others, have been reviewed. A considerable part of these…
AIMS: A polyphasic approach was used to study the biodiversity bacteria associated with biocorrosion processes, in particular sulfate-reducing bacteria (SRB) and thiosulfate-reducing bacteria (TRB) which are described to be particularly aggressive towards metallic materials, notably via hydrogen sulfide release. METHO…
A simple model is presented to describe the variation of the onset of the initial planar instability with surface tension anisotropy during directional solidification. The effect of surface-tension anisotropy on the incubation time and the initial average wavelength of planar instability are predicted by the simple mo…
Nanocomposites of ferrite and ferroelectric phases are attractive functional ceramic materials. In this work, the nanocomposite Ni1−x Co x Fe2O4–BaTiO3(x = 0.2, 0.3, 0.4, 0.5) fibers with fine diameters of 3 ~ 7 μm and high aspect ratios were synthesized by the organic gel-thermal decomposition process from the raw ma…
The effect of using different mercerization media on some mechanical properties of local plant bast fibres, Roselle (Hibiscus sabdariffa), kenaf (Hibiscus cannabinus), okra (Hibiscus esculentus), Baobab (Adansonia digitata) respectively, were generally investigated. The fibres from these sources were purified using th…
Prolyl 4-hydroxylases (P4H) catalyze the post-translational hydroxylation of proline residues and play a role in collagen production, hypoxia response, and cell wall development. P4Hs belong to the group of Fe(II)/alphaKG oxygenases and require Fe(II), alpha-ketoglutarate (alphaKG), and O(2) for activity. We report th…
L-ascorbic acid (Vitamin C) and peptide are both useful compounds for collagen biosynthesis in cosmeceuticals (cosmetic and pharmaceutical fields). The instability of these compounds, however, limit their application in these industries. In this report, we describe the development of a novel compound, Stabilized Ascor…
The capillary condensation and capillary emptying of water and perfluoropentane in ordered mesoporous SBA-15 silica is studied by in-situ small-angle neutron scattering (SANS). The SANS data can be perfectly described by a simple analytical model for spatially random pore filling (Laue scattering) for the entire range…
Terahertz time-domain spectroscopy has been used to study the optical and dielectric properties of three chalcogenide glasses: Ge30As8Ga2Se60, Ge35Ga5Se60, and Ge10As20S70. The absorption coefficients α(ν), complex refractive index n(ν), and complex dielectric constants ɛ(ν) were measured in a frequency range from 0.3…