Materials Literature
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Using the first-principles real space DMOL3 method, we investigate the electronic structure of C doped at different types of interstitial sites in the [100](010) edge dislocation core of bcc Fe. Our energetic calculations show that C has a strong segregation tendency to enter the expansion region, which is related to…
We performed ab initio, self-consistent calculations for the electronic structure of selected semiconducting carbon nanotubes in the symmorphic and nonsymmorphic groups. We employed a real space approach in the linear combination of atomic orbital formalism. We utilized a nonlocal density-functional potential in the g…
We investigate the half metallicity and localized spin magnetic moments for individual nanoclusters of zinc-blende transition-metal pnictides and chalcogenides $TX$ ($T=\mathrm{V}$, Cr, and Mn; $X=\mathrm{N}$, P, As, Sb, S, Se, and Te) using first-principles molecular-orbital calculations. These nanoclusters, as well…
Abstract The electrodeposition of a sufficiently large amount of gold on vapor‐deposited film electrodes at high overpotentials leads to excellent substrates for surface‐enhanced Raman scattering (SERS) spectroscopy. The SERS enhancement factor is estimated to be >10 7 with near‐infrared excitation, a value which i…
The feasibility of in vivo cellular imaging using a 1.5 T clinical magnet was studied in the mouse. Hybridoma cells were labeled with anionic gamma-Fe2O3 superparamagnetic iron oxide nanoparticles. These were internalized by the endocytose pathway. Both electron spin resonance and magnetophoresis as a measure of the l…
Abstract Previously introduced method for transforming kinetic function expression was applied on the differential form of isothermal Johnson–Mehl–Avrami (JMA) nucleation and growth equation, to determine the duration of the induction period, τ. The assisting function φ = t m was used to obtain a new equation, which e…
Abstract This article reports on the influence of the paraffin (PAR) on the wood fiber (WF) dispersion in different polyethylene (low‐density polyethylene, high‐density polyethylene, recycled polyethylene) matrices, as well as on the melt flow behavior and mechanical properties of WF‐reinforced polyethylene (PE) compo…
Species composition and ecological preferences of the most important periphytic diatom taxa were studied in lentic ecosystems in the salt marshes of Emporda wetlands (NE Spain). Correspondence analysis with the diatom communities suggested that water confinement/flooding gradient and productivity of the system were th…
We present the results of electrical resistivity and Hall effect measurements on single crystals of HfNiSn, TiPtSn, and TiNiSn. Semiconducting behavior is observed in each case, involving the transport of a small number of highly compensated carriers. Magnetization measurements suggest that impurities and site disorde…
Abstract The influences of the deacetylation temperature, deacetylation time, and NaOH concentration on the degree of deacetylation (DD) of deacetylated products prepared from β‐chitin are discussed. The DD values of deacetylated products are related to the ratio of the signal intensities of methyl on acetyl groups an…
For use in micro-patterned scaffolds in tissue engineering, novel diacrylated triblock macromers (PLA-b-PCL-b-PLA, PGA-b-PCL-b-PGA and PCL-b-PEO-b-PCL) were synthesized and characterized by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance spectroscopy (NMR) and gel permeation chromatography (…
Damage accumulation due to cascade overlap, which was simulated previously, has been used to study the changes in elastic constants and the bulk and elastic moduli as a function of dose in SiC. These mechanical properties generally decrease with increasing dose, and the rapid decrease at low-dose levels indicates that…
Abstract The effect of surface chemistry on proliferation and morphology of bone cells cultured on surface modified poly(3‐hydroxybutrate‐ co ‐3‐hydroxyvalerate) (PHBV) and untreated PHBV was evaluated. The surface of cast PHBV film was physically and chemically immobilized with collagen. For preparing chemically immo…
Incompletely condensed silsesquioxanes of the type R7Si7O9(O[SiR'2O]n)OH (R = c-C5H9, c-C6H11; R' = Me, Ph; n = 1-4), containing a siloxane ring of variable size and rigidity and a remaining silanol, are described. Compared with a truly isolated silanol [R7Si8O12(OH)], solution and solid state FT-IR spectra of these c…
Abstract Summary: A diblock copolymer brush consisting of poly(methyl acrylate)‐ block ‐poly(pentafluoropropyl acrylate) (Si/SiO 2 //PMA‐ b ‐PPFA) was synthesized on a porous silica substrate. The brush was exposed to selective solvents, as well as thermal treatments, to induce a surface rearrangement. The rearrangeme…
Abstract The adsorption of phenylacetylene (PA) on gold nanoparticle surfaces was investigated by means of surface‐enhanced Raman scattering (SERS). The aggregation behaviors were examined by UV–visible absorption spectroscopy and transmission electron microscopy. The phenyl ring of PA appeared to assume a perpendicul…
The frictional behavior of diamond-like carbon (DLC) films varies with environmental condition. One theory asserts that the cause of variations in the frictional performance is environmental contaminants adsorbing onto the DLC film surface. Testing of the frictional performance of DLC films in a pin-on-disk contact ha…
Abstract Lead was removed from lead silicate glass 7.3Na2O–6.4K2O–3.7MgO–5.4CaO–66.4SiO2–7.8PbO–3Al2O3 (mol %), used in color television CRT funnel, utilizing a subcritical hydrothermal treatment at 628 K and 24 MPa followed by acid leaching at 373 K. This process may be used to prevent disposal of lead containing was…
Secondary electron spectra have been collected from both pure elements and from compounds examined under conditions approximating those found in a scanning electron microscope. Despite the presence of substantial surface contamination these spectra are found to be reproducible and characteristic of the underlying mate…
Abstract Titanate pyrochlores R2Ti2O7 (R = Y, rare earth) were synthesized by a polymerized complex (PC) technique and used as photocatalysts for the splitting of water into H2 and O2. NiOx-loaded Y2Ti2O7, the first example of an active photocatalyst with a pyrochlore structure, demonstrated efficient evolution of H2…