Materials Literature
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Hybrid polymers [(DeltaO3)4Si3]n and [(DeltaO3)SiMe]n (where Delta = C6N7 or C3N3) have been prepared by a novel sol-gel process based on exchange reactions of MeSiCl3 or SiCl4 with C6N7(OSiMe3)3 and C3N3(OSiMe3)3.
In order to improve the fracture toughness of inherently brittle ceramics, a new material design concept must be developed. One suitable concept involves the use of dislocation activities. Intra-type ceramic-based nanocomposites use dislocation activities to enhance strength and fracture toughness. The dislocations ar…
We designed and synthesised new bolaamphiphiles consisting of hydrophobic rigid cores, flexible trisiloxane spacers, and terminal ammonium groups. Organised structures of the bolaamphiphiles with biphenyl and azobenzene cores were examined in the bulk and in the monolayer states. In the bulk states, these molecules ex…
Relationships between molecular structures of three types of europium complexes and solubility in hexane and fluorinated media were investigated. The solubility of europium complexes with β-diketones (type-1) was correlated to the substituents of β-diketones. Introducing bulky substituents was effective for enhancing…
Surface modification of poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether) (PFA) with vacuum UV (VUV) photo-oxidation using radiation from excited Ar atoms downstream from an Ar microwave (MW) plasma shows: (1) an improvement in wettability as observed by water contactangle measurements; (2) surface roughening;…
Molecular structure and morphology of a nanocomposite of low-density polyethylene (LDPE) and nano-SiOx were studied by dynamic mechanical analysis (DMA). The storage modulus (E/) and the glass transition temperature (Tg) of the nanocomposite are higher than those of pure LDPE and vary with nano-SiOx contents in U-shap…
A novel series of valence tautomeric (VT) complexes, [Co(Cnbpy)(3,5-DTBQ)2] (Cnbpy = 4,4'-dialkyl-2,2'-bipyridine (alkyl = (C(n)H(2n+1)) where n = 0 (CoC0bpy), 1 (CoC1bpy), 5 (CoC5bpy), 9 (CoC9bpy) and 13 (CoC13bpy); 3,5-DTBQ = 3,5-di-tert-butylsemiquinonate or catecholate), including two previously reported complexes…
For the first time highly-oriented AlPO4-5 molecular sieve films have been achieved on millimeter-sized AlPO4-5 single crystal substrates by epitaxial growth. The orientation of the molecular sieve films can be adjusted via changing the basal faces of the substrate crystal. Furthermore, a laser dye has been successful…
In this study, a new process for a crystal alignment of an alloy during solidification has been proposed in which the imposing periods of a static magnetic field and an alternating current are controlled. In the initial stage of the solidification both the magnetic and electric fields are imposed on the alloy to break…
Si3N4 ceramics were sintered at 1873-2023 K (1600-1750°C) with additives from the SiO2-MgO-Y2O3 system. The degree of densification, α-β transformation, mass loss and microstructure were measured as a function of additives composition, sintering temperature, nitrogen gas pressure, and with/without packing powder. Spec…
The atomic and magnetic structures of the La0.7Sr0.3CoO3 cobaltite are investigated using neutron diffraction at high pressures up to 4.2 GPa in the temperature range 16–300 K. The structural parameters are determined as functions of the pressure. It is revealed that the effect of high pressure leads to a decrease in…
Chlorophenoxyacetic acids are a well known family of herbicides. 4-Chlorophenoxyacetate (4-CPA), 2,4-dichlorophenoxyacetic (2,4-D), 2,4,5-trichlorophenoxyacetate, (2,4,5-T) have been intercalated into [LiAl2(OH)6]Cl·xH2O LDH ([Li–Al–Cl] LDH) by ion-exchange. The kinetics and mechanisms involved in the intercalation of…
The dielectric permittivity tensor components, εII and ε⊥, in the nematic phase of 6CB (4‐n‐hexyl‐4′‐cyanobiphenyl) were measured in the pressure range 0.1–130 MPa and the temperature range 12–58°C. The dielectric anisotropy, Δε(p, V, T) = εII ‐ ε⊥, was analysed in isothermal, isobaric and isochoric conditions taking…
In order to evaluate the efficacy of liposomes as a drug carrier for atherosclerotic therapy, a pharmacokinetic analysis of the uptake of liposomes by macrophages and foam cells in vitro and their distribution to atherosclerotic lesions in mice was carried out. In brief, liposomes of three particle sizes (500, 200 and…
Surface-enhanced resonance Raman scattering (SERRS) of Rhodamine 6G (R6G) adsorbed on colloidal silver clusters has been studied. Based on the great enhancement of the Raman signal and the quench of the fluorescence, the SERRS spectra of R6G were recorded for the samples of dye colloidal solution with different concen…
In the first part of this study, the inhibitor effect of single, binary and  ternary mixture of chromate, molybdate, nitrite, tetraborate, ortophosphate, benzoate, acetate, ascorbic acid on  the corrosion of carbon steel was investigated. Experiments were carried out in  neutral…
This issue of Journal of Materials Chemistry highlights recent progress in molecular magnetic materials. Eugenio Coronado and Dante Gatteschi introduce the issue and the importance of the field.
The development of new and innovative technologies and methods for treating environmental contaminants is a critical step in the effort to protect the environment and its components.The continuing investment of public and private resources in demonstration projects represents a major commitment to promoting the techni…
This paper is focused on the investigation of transformers internal electromagnetic forces caused by external fault. The simulations are based on the finite elements method (FEM) to model a three-phase transformer and also to calculate the forces via traditional mechanical and electrical equations. Normal operation an…
In this work, polyaniline (PANI) nanofibrous networks were prepared using ionic liquid (IL), 1-hexadecyl-3-methylimidazolium chloride (C16MIMCl), as a template through oxidative polymerization of aniline with ammonium persulfate. The resulting PANI was characterized by means of scanning electron microscopy (SEM), tran…