Materials Literature
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The ease with which water is released from cellulosic fiber material during the manufacturing of paper can affect both the production rate and the consumption of energy during the manufacturing process. Important theoretical contributions to dewatering phenomena have been based on flow through packed beds of uniformly…
Previously we demonstrated hierarchical self-assembly and mesoporosity in electrospun fibers using selected polystyrene--poly(4-vinylpyridine) (PS--P4VP) diblock copolymers with hydrogen-bonded 3--pentadecylphenol (PDP), which rendered distorted spherical P4VP(PDP) domains within the PS matrix, internal lamellar order…
Selective oxidation of styrene to acetophenone has been investigated for the first time over Pd–Au catalysts with H2O2 in CO2 medium. The influence of the support on the catalytic activity and the product selectivity was investigated, and Al2O3 support showed the best catalytic performance in this system. The presence…
Dual dc-rf plasma system has been used to deposit hydrogenated carbon nitride (CNx:H) films that exhibit high elastic recovery (75%). Transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectra and Raman spectra were subsequently used to study the microstructure and bonding of the resultant films…
The corrosion inhibition of mild steel in one normal sulphuric acid solution by PEGME has been studied in relation to the concentration of the inhibitor as well as the temperature using electrochemical polarization (galvanostatic and potentiostatic) techniques. The results were supplemented with scanning electron micr…
Double perovskites Sr2CrSbO6 and Ca2CrSbO6 have been prepared by a solid-state procedure. The crystal and magnetic structures have been studied from X-ray (XRD) and neutron powder diffraction (NPD) data. Rietveld refinements show that the room-temperature crystal structure is monoclinic (space group P21/n), and contai…
Three‐dimensional structures were assembled by direct writing of colloidal gel‐based inks of electro‐ceramic and metal electrode compositions. The ternary mixtures of BaTiO 3 , BaZrO 3 , and SrTiO 3 were explored via an active mixing nozzle print strategy that allowed for rapid screening of complex oxide ceramics. In…
Lanthanum nickelate (LN, ) is a mixed ionic and electronic conductor with oxygen self-diffusion and surface exchange properties that predict that it will be a good cathode catalyst for solid oxide fuel cells. We show that LN performs poorly when used as a single-phase cathode in yttria-stabilized-zirconia-based air- d…
Nine new vanadium oxyfluorides, containing ten different oligomeric vanadium (oxy)fluoride anions have been prepared by solvothermal synthesis in water-ethylene glycol and using organic cations as co-crystallising agents. Crystal structures are reported for each. Amongst the ten structure types, five represent previou…
Two different approaches under ambient conditions were developed for the preparation of clean, non-reconstructed, single crystalline ZnO(0001)-Zn surfaces. The surface preparation by a wet chemical etching procedure was compared with the same treatment in combination with a subsequent heat treatment in humidified oxyg…
Metal-free 5,10,15,20-tetraferrocenylporphyrin and 5,10-bisferrocenyl-15,20-bisphenylporphyrin have been prepared and characterized by UV-Vis, MCD, (1)H, (13)C, and variable-temperature NMR, APCI- and ESI-MS, and Mössbauer spectroscopy, while their redox properties were investigated using electrochemical (cyclic volta…
The cascade reaction of sterically hindered dipyrromethanes and formaldehyde furnished meso(10)-meso(10') linked corroles--a new type of porphyrinoid--compounds with interesting photophysical properties.
The synthesis and characterisation of a hybrid supertetrahedral nanocluster, [Ga10S16(NC7H9)(4)](2-), in which the terminal S(2-) anions have been replaced by covalently bonded amine molecules, is described.
The reaction of btzmp (1,2-bis(tetrazol-1-yl)-2-methylpropane) with Fe(ClO4)2 generates a 1D polymeric species, [Fe(mu-btzmp)2(btzmp)2](ClO4)2, showing a steep spin transition (T(1/2) / =136 K and T(1/2) / =133 K) with a 3 K thermal hysteresis. The crystal structure at 100 and 200 K reveals that, in contrast to other…
During the past decade we have looked at several ways to track the distribution of unpaired electrons during chemical reactions and in different spin states. These methods were inspired by our previous work on singlet di-radicals where the spin density is zero yet there are clearly singly occupied orbitals. More recen…
Continuous real-time monitoring of the nanotube concentration in aqueous solution using UV-Vis spectroscopy allows quantitative comparison of the stability of different types of nanotube dispersions. Systematic investigation of the effects of nanotube length and functionalisation for thin multiwalled carbon nanotubes…
The magnetoelectric (ME) susceptibility (αme) is the fundamental property that describes the coupling between the polarization and magnetization of a ME media. It is a complex quantity (αme*) which has rarely been studied. Here, we report investigations of the ME susceptibility for various ME laminated composites, whi…
A three-dimensional solid-state interpenetrating electrochemical cell was synthesized by infiltrating a cathode ambigel into a macroporous, polymer-coated carbon anode. The cathode material was characterized using scanning electron microscopy, sorption analysis, and X-ray photoelectron spectroscopy to determine the ov…
Racemic and enantiopure ethylenedithio-tetrathiafulvalene-thiomethyl-oxazoline (EDT-TTF-(SMe)-OX) derivatives have been synthesized. Single-crystal X-ray diffraction analyses reveal the establishment of O⋯S nonbonded interactions, unprecedented in the TTF series, characterized by short S⋯O distances and linear O⋯SMe m…
Thermodynamics of titanium, nitrogen and TiN formation in liquid iron was investigated using the metal–nitride–gas equilibration under different nitrogen partial pressures in the temperature range of 1873–1973 K. The nitrogen solubility in liquid iron increased with increasing titanium content. Pure solid TiN was form…