Materials Literature
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Annual growth agrofibers like flax and jute can compete with glass fibers, considering their intrinsic mechanical properties. This paper discusses reinforcement of polypropylene (PP) homopolymer with flax bast fibers. Maleic Anhydride modified PP (MAPP) grades are screened on coupling efficiency. Three mechanisms appe…
The rate of copper corrosion originated by the action of formic acid vapors at 100% relative humidity was studied. Five formic vapor concentration levels (10, 50, 100, 200, and 300 ppm) were used. A copper corrosion rate of up to was measured for a period of 21 days using a gravimetric method. The patina layers were c…
Reflectivity of X-rays from surfaces and interfaces reflectivity experiments advanced techniques statistical description of surfaces and interfaces off-specular scattering scattering with coherent radiation.
Rifampicin shows polymorphism; therefore, it is necessary to select a suitable crystal form at an early stage of development to ensure optimum solubility and dissolution rates. This study was an investigation into the crystal properties of several rifampicin raw materials currently being used by manufacturers of gener…
A template-like model, which was an aniline salt formed with β-naphthalene sulfornic acid (β-NSA) as a dopant, was proposed to interpret the formation mechanism of polyaniline (PANI) microtubules doped with β-NSA by a template-free method. Scanning electron microscope (SEM) and X-ray diffraction measurements confirmed…
The cyclability performance of several composite polymer electrodes based on poly(thiophene) (pTh), poly(3‐methylthiophene) (pMeT), and poly[3‐(4‐fluorophenyl)thiophene] (pFPT), carbon, and a binder is reported. These composites were tested for use as positive and negative electrodes in supercapacitors for electric ve…
Model studies on the catalytic methanol oxidation over single and polycrystalline copper have been performed. The catalytic activity was investigated by means of temperature-programmed techniques (thermal desorption and temperature-programmed reaction spectroscopy, TDS and TPRS, respectively). The TPRS experiments cal…
A cyclic tetranuclear CuII2GdIII2 complex, in which CuII and GdIII ions are arrayed alternately, has an S = 8 spin ground state, due to the ferromagnetic spin coupling between SGd = 7/2 and SCu = 1/2.
Two heterometallic complexes [{CuII(HLOX)NiII(N3)}2] and [(tmtacn)CoIII(μ-OH)CuII(LOX)NiII(OH2)2][ClO4]2 (tmtacn = 1,4,7-trimethyl-1,4,7-triazacyclononane) containing the same [CuIINiII] core embedded in an unsymmetrical dicompartmental imine-oxime ligand H4LOX have been synthesized and characterized. Their crystal st…
Different characteristic surface structures such as spheres and hemispheres, honeycomb, regularly spaced droplets and fibers are formed by electrostatic polysaccharide interaction between chitosan and gellan gum via polyion complex (PIC) formation. Spherical droplet-like PIC capsules of varying diameter form in soluti…
Infrared reflection absorption spectroscopy and quartz crystal microbalance, integrated into a one‐surface analytical system, and complemented with tapping mode atomic force microscopy, has been used to explore the metal/atmosphere interfacial region under atmospheric pressure conditions. This unique combination of in…
Copper–aluminium mixed oxide catalysts (Cu–Al2O3) for selective reduction of NO with propene (C3H6-SCR) were characterised as a function of Cu content. The results from different techniques, Cu K-edge and Cu L3-edge XANES, diffuse reflectance UV–Vis, XPS, and XRD were combined to develop coherent description of the ph…
Platinum nanosheets with thickness 2–3 nm containing hexagonal holes were formed between graphite layers by hydrogen reduction of platinum chloride–graphite intercalation compounds.
Barium ferrite is widely used as a permanent magnet because of its large coercivity and low cost. The usual route to produce barium ferrites is the ceramic method. In order to overcome the detrimental milling effects in the magnetic properties, ferrite powders were obtained by coprecipitation. This method can produce…
The ligand H2L = 2,2′-bipyridine-6,6′-dicarboxylic acid reacts with Ln(NO3)3·xH2O (x = 6, Ln = Eu, Tb; x = 5, Ln = Gd) in MeOH/Et3N to give complexes with 1∶2 and 2∶3 metal∶ligand stoichiometry, (Et3NH)[LnL2] and [Ln2L3(H2O)3]·xH2O (x = 1, Ln = Eu, Tb; x = 0, Ln = Gd) which have been isolated and characterised. A size…
The individual effects of heterogeneity and roughness on contact angles have been repeatedly analysed in the literature, but the application of the accepted models to practical situations is often not correctly performed. In the present paper the combined effects of roughness and heterogeneity on the contact angles of…
Angle-resolved XPS and micro-XPS have been used for characterizing reaction products consisting of oxide and oxyhydroxide formed on the surface of high-purity iron exposed to air at room temperature for a long time. Angle-resolved measurements of O 1s XPS spectra have shown that an oxyhydroxide layer covers a native o…
Aminated phyllosilicates have been synthesized by a sol–gel process from reactions of nickel ions and three analogous trialkoxysilanes, 3-(trimethoxysilyl)propylamine, N′-[3-(trimethoxysilyl)propyl]ethylenediamine and N′-[3-(trimethoxysilyl)propyl]diethylenetriamine, in aqueous basic medium at 298 and 323 K. The inorg…
Photoluminescence studies on pure and compounds are presented. The pure compound displays a broad band in its emission spectrum when excited with 254 nm, which peaks at 467 nm and is due to the energy transfer between the molecular orbital of the ligand and charge transfer state of the . The excitation spectrum shows…
In the presence of Na+, a 1,3-alternate-calix[4]arene bearing four guanosine units forms a self-assembled nanotube.