Materials Literature
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In the magnetic Eden model (MEM), particles have a spin and grow in contact with a thermal bath. Although Ising-like interactions affect the growth dynamics, deposited spins are frozen and not allowed to flip. This review article focuses on recent developments and future prospects, such as spontaneous switching phenom…
The conoscopic method for investigating the optical properties of a liquid crystal cell is studied with the aim of determining the effects of the approximations used in the calculation on the results. We confirm that the chiral liquid crystal cell forming a helical structure can be regarded as a single biaxial plate f…
Cathodic protection is an effective electrochemical technique for preventingcorrosion of metallic structures. It has widespread applications on various structures,suffering serious problems of corrosion in the environments.The main problem with this protection method is to determine the parameters(current density and…
The heat capacities of two different molecule-containing melanophlogites of approximate composition 46SiO 2 ·1.80CH 4 ·3.54N 2 ·1.02CO 2 from Mt. Hamilton, California, and 46SiO 2 ·3.59CH 4 ·3.10N 2 ·1.31CO 2 from Racalmuto, Sicily, along with a heat-treated (molecule-free) sample of composition SiO 2 , were studied b…
The present article investigates a reversible structural phase transition, and related physical properties change in a new quasi-one-dimensional (1D) organic semiconductor crystal, DBA(TCNQ) 2 [DBA = dibutylammonium, TCNQ = 7,7,8,8-tetracyanoquinodimethane]. Differential scanning calorimetry traces reveal the DBA(TCNQ…
Silver 4-aminobenzenethiolate (Ag-4ABT) is one of the organic−inorganic heterostructured materials that show a well-developed progression of intense X-ray reflections associated with an infinite-sheet, two-dimensional, nonmolecular layered structure, possessing also peculiar photochemical characteristics. When visible…
BACKGROUND/AIMS: Several shortcomings have limited the routine use of autogenous vascularized bone graft. The present study investigates the prefabrication of vascularized scaffold with the desired shape and microarchitecture combined with recombinant human vascular endothelial growth factor 165 (rhVEGF(165)) to mimic…
The crystal structures of natrolite and its dehydrated high-temperature phases (α1- and α2- metanatrolite) have been determined from powder X-ray diffraction measurements as a function of temperature and partial pressure of water (P H ₂ O ) to characterize the phase transition behavior. The evolution of crystal struct…
Dissolution behavior of muscovite under alkaline conditions at 25-50 °C was investigated using in situ atomic force microscopy (AFM) with an air/fluid heater system to derive reliable dissolution rates and determine the dissolution mechanism and the effect of temperature on the dissolution rates. The muscovite dissolu…
Arrays of In2O3 islands have been grown on cubic zirconia by oxygen plasma assisted molecular beam epitaxy at high substrate temperatures. The square pyramidal epitaxial islands have a narrow size distribution centering on 1 μm and a uniform azimuthal orientation with square edges aligned along the ⟨110⟩ directions of…
The viscous capture threads produced by over 4000 species of orb-weaving spiders are formed of regularly spaced aqueous droplets supported by a pair of axial fibers. These threads register increased stickiness when spans of increasing lengths contact a surface, indicating that adhesion is recruited from multiple dropl…
The crystal structure of glaucodot, (Co,Fe)AsS, an important member of the FeAsS-CoAsS-NiAsS system, was determined with single-crystal X-ray diffraction. It is orthorhombic with space group Pn2 1 m and unit-cell parameters a = 14.158(1), b = 5.6462(4), c = 3.3196(2) Å, and V = 265.37(5) Å 3 . The structure is closely…
The importance of nanotechnology in human health care is unquestionable. There is a growing interest to apply nanotechnology in cancer therapy, as an example. In this report, we have fabricated gold nanoparticle (AuNP), the delivery vehicle of interest, with an anti-cancer drug (Velcade) and a targeting agent (folic a…
The crystal chemistry of two dimorphic hydrated sodium beryllium silicates, epididymite [a = 12.7334(4), b = 13.6298(5), c = 7.3467(3) Å, V = 1275.04 Å 3 , space group Pnma)] and eudidymite [a = 12.6188(10), b = 7.3781(5), c = 13.9940(9) Å, β = 103.762(5)°, V = 1265.47 Å 3 , space group C2/c] from Malosa, Malawi, has…
Fresh and weathered granite from drill cores in Tono, Gifu, Japan, was examined to understand weathering products and the mechanisms of chlorite and biotite weathering under low P O₂ conditions. A fresh sample from 365 m depth, a slightly weathered light-green sample from 367 m depth, and a nearly fresh sample from 36…
Brucite-like mixed hydroxides of the general formula Mg x M 1− x (OH) 2 for M = Zn, Cu or Ca were studied by density functional theory within pseudopotential approximation, plane waves basis set, and periodic boundary conditions. Geometrical parameters and energy analysis were done for different compositions (differen…
Diatom assemblages from sediment trap samples collected during ten intervals between October 2003 and October 2005 in Sacrower See (NE Germany) were related to limnological and meteorological data. Sacrower See is a dimictic, 38 m deep, hypertrophic lowland lake (29.5 m a.s.l.). We identified distinct seasonal and int…
The excited state dynamics of Zn2+, Fe3+, and Mn3+ meso-tetra(sulfonatophenyl) porphyrin complexes were investigated with a Z-scan technique at 532 nm using 70 ps and 120 fs single pulses and 200 ns pulse trains of a Q-switched and mode locked laser. We determined the characteristic interconversion and intersystem cro…
A series of copolymers based on diaminotetraphenylporphyrin (DATPP), oxidianiline (ODA), and pyromellitic dianhydride (PMDA) were synthesized. The resulting copoly(amic acid)s (CPAAs) were electrospun into uniform nanofibers. Subsequently, copolyimide (CPI) nanofibers were obtained from the CPAA nanofibers by thermal…
A simple theoretical framework is presented to identify the key molecular properties and macromolecular arrangements leading to high second-order nonlinear optical (NLO) activity of chiral crystals. In chiral materials, maximum second harmonic generation (SHG) efficiency is predicted for an antiparallel molecular arra…