Materials Literature
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Rosin, a robust inexhaustible raw material from pine tree has attracted much attention due to its utilization as a feedstock for the preparation of cationic surfactants. Maleopimaric acid (MPA), one of most important rosin derivative obtained from the Diels-Alder reaction between the gum rosin and maleic anhydride whi…
Within the framework of a thermodynamically equilibrium model, dynamic loading of mixtures of two and more condensed phases with different properties within the experimental error is described by using species parameters only. The behavior of alloys considered as mixtures with the same volume fractions of the species…
A nanocrystalline Si layer can be formed by the surface structure chemical transfer (SSCT) method in which a platinum mesh is instantaneously contacted with polycrystalline Si wafers immersed in hydrogen peroxide plus hydrofluoric acid solutions. The polycrystalline Si surface after the SSCT method possesses an ultra-…
Interactions of graphene oxide with Ag + , Cu 2+ , Fe 2+ , Fe 3+ , and Bi 3+ ions were studied. The minimum (threshold) ion concentrations required for the interaction with graphene oxide to occur were deter-mined in a series of experiments. A possible model of the interaction between the metal ions and the oxygen-con…
The paper reports on theoretical and experimental studies which demonstrate that crack propagation in solids in brittle and brittle-ductile fracture is a nonlinear wave process. The effect of the structural phase state and stress-strain stiffness of material on the crack type (opening, sliding, or tearing mode) and on…
The possibility of using polytitanates as fillers was studied. The conducted tests showed the possibility of controlling the structure formation processes and properties of an epoxy composite by introducing small additions of potassium polytitanates.
Copper nanoparticles were synthesized using chemical reduction method by reduction of copper sulphate as a metal precursor and sodium borohydride as reducing agent. The particles are characterized and assessed by UV-Vis spectrometer, SEM-EDS and particle size analysis. SEM-EDS and particle size analysis contributed to…
Though chemical modification of graphene based on Hummers method has been most widely used to tailor its properties and interfacial characteristics, a method which could achieve definitive and controllable groups and properties is still highly required. Here, we demonstrate a high-vacuum oxidation strategy by atomic o…
Abstract The reaction of 6‐formyl‐2‐(hydroxymethyl)‐4‐methylphenol (LH 2 ) with appropriate lanthanide salts followed by reaction with Co(OAc) 2 · 4H 2 O afforded the pentanuclear heterobimetalllic compounds [Co 4 Ln(L) 4 (OAc) 2 (S) 4 ](NO 3 )(S) [Ln III = Gd III , S = MeOH ( 1 ); Ln III = Dy III , S = H 2 O ( 2 ); L…
First-principles calculations of the electronic structure and linear optical properties of metallic carbon nanotubes are carried out using the full-potential linear-augmented plane-wave method. The effect of intraband transition and electric-field polarization on the optical spectra of (5,2) chiral, (15,0) zigzag, and…
Reducing vehicle weight and emissions by lightweight design is a major goal of the automotive industry. Magnesium as the lightest structural metal offers a significant weight saving potential compared to steel and aluminium. Cast magnesium components are widely used, e.g. as engine blocks or gear box housings. The app…
Self-assembled poly(N-methylaniline)-lignosulfonate (PNMA-LS) composite spheres with reactive silver-ion adsorbability were prepared from N-methylaniline by using lignosulfonate (LS) as a dispersant. The results show that the PNMA-LS composite consisted of spheres with good size distribution and an average diameter of…
ABSTRACT This study aims to investigate and compare the effects of different divalent transition metal cations (M 2+ : Mn 2+ , Fe 2+ , Co 2+ , Ni 2+ , Cu 2+ , and Zn 2+ ) exchanged into the hydrated zeolite Y on the electrical conductivity and sensitivity response of Poly(3,4‐ethylenedioxythiophene) doped with poly(st…
We investigated the microstructural and magnetic property changes of DyF3dip-coated Nd-Fe-B sintered magnets as a function of the first post-sintering annealing (PSA) temperature and clarified the optimum first PSA temperature for the dip-coating process. Coercivity increased (from 26.7 to 29.06 kOe) with increasing f…
Magnesium (Mg)/hydroxyapatite (HA) (10 wt.% and 20 wt.%) composites were prepared by using pure Mg and as synthesized HA powders using the spark plasma sintering (SPS) method. The objective of the present study is to improve the corrosion resistance of spark plasma sintered Mg/HA composites and to ensure that the degr…
We analyze the radially symmetric solution corresponding to the vortex defect (the so-called melting hedgehog ) in the Landau–de Gennes theory for nematic liquid crystals. We prove the existence, uniqueness and stability results of the melting hedgehog.
Optically homogeneous mixed K2Ni x Co(1 − x)(SO4)2 · 6H2O crystals are grown from solutions of different compositions by the temperature-reduction technique in static and dynamic regimes. The optical characteristics of the grown crystals are measured: transmittance reaches 80% in the wavelength range of 240–290 nm and…
Binary blend compatibility of chitosan (CS) and poly(ϵ‐caprolactone) (PCL) was simulated at different blending ratios in molecular and mesoscopic level. In molecular simulation, Flory–Huggins interaction parameters and mixing enthalpies were calculated to estimate the blend compatibility. Results showed that compatibi…
Traditional post-surgical chemotherapy for pancreatic cancer is notorious for its devastating side effects due to the high dosage required. On the other hand, legitimate concerns have been raised about nanoparticle-mediated drug delivery because of its potential cytotoxicity. Therefore, we explored the local delivery…
Docetaxel (DTX) has excellent efficiency against a wide spectrum of cancers. However, the current clinical formulation has limited its usage, as it causes some severe side effects. Various polymeric nanoparticles have thus been developed as alternative formulations of DTX, but they have been mostly fabricated on a lab…