Materials Literature
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A numerical methodology for evaluating the three-phase boundary length (TPBL) in sintered composite solid oxide fuel cell electrodes is developed. Three-dimensional models of a representative volume element of sintered composite electrodes are generated for which the mean particle diameter, composition, and total poro…
A simple, yet general coating method to plasma treated polymeric substrates is presented. The method is based on electrostatic interactions between the surface functionalized nanoparticles and the charged substrate and leads to stable and solvent resistant multilayer coatings. The coatings render polypropylene (PP) hy…
We perform a systematic numerical study of the effects of the particle-size ratio R ≥ 1 on the properties of jammed binary mixtures. We find that changing R does not qualitatively affect the critical scaling of the pressure and coordination number with the compression near the jamming transition, but the critical volu…
The vast majority of matrices used in microencapsulation are spherical. This geometry has some drawbacks due to its low surface/volume ratio: for example the difficult diffusion of oxygen to the bulk of a cell-containing microbead may lead to hypoxia or necrosis of the encapsulated cells. Here we focused on toroidal m…
Despite the recognition of the importance of Spiropyran (SP)–Merocyanine (MC) photochromic materials in molecular switching, the majority of studies have been reported in solution with relatively few in the solid-state as required in modern displays and other devices. In contrast, the present work bridges solution, co…
We present a time-resolved absorption study on the light-induced generation of reversible linkage NO isomers in single crystals of Na(2)[Fe(CN)(5)NO] x 2 H(2)O using laser pulses of 160 fs width. Using the pump wavelength lambda = 500 nm the singlet-singlet (1)A(1)-->(1)E excitation induces the NO rotation by about 90…
Nitro-nitrito photoisomerisation is investigated in solid samples and solutions of trans-[Ru(py)(4)(NO(2))(2)]. Using light of wavelength 325 nm 50% of the N-bound Ru-NO(2) ligands can be switched to the O-bound Ru-ONO configuration (nitrito-N to nitrito-O isomerisation) at temperatures below T = 250 K in solids. The…
We describe an experiment whose results are interpreted as a direct measurement of the chemical reaction kinetics of atoms being removed from high coordination crystal terrace sites, at least in the particular restricted case of electrochemical dissolution of metal alloys. The central idea is that there are binary met…
In order to examine the influence of phosphate impurities upon the conduction properties of SnP2O7, SnP2O7-H3PO4 composites were synthesised through different methods with varying starting P:Sn molar ratios. The composites were then carefully characterised by XRD, SEM, HRTEM, NMR, FT-IR and a.c. impedance spectroscopy…
A metallic nanocone array by means of a directional electrodeposition method without any template is reported. With the crystallization modifier in the nickel electroplating solution, the cobalt conical structure can be deposited onto different metal substrates. The morphology of the nanocones can be controlled by cha…
Tetragonal starlike microstructures of polyaniline (PANI) doped with aspartic acid (AA) have been synthesized under hydrothermal conditions for the first time. It was found that the morphologies of the obtained samples were much sensitive to the concentration of the doping amino acid. Hydrothermal synthesis by monitor…
Highly selective etching of a silicon dioxide layer using a very thin physical-vapor-deposited amorphous carbon layer (PVD-ACL) was investigated in a dual-frequency superimposed capacitively coupled plasma etcher. The following process parameters of the /Ar plasmas were manipulated: flow ratio, high frequency (HF) pow…
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A 1D compound composed of cyanide bridged iron(II,III) ions was prepared and magnetic measurements revealed it to be a single chain magnet.
The biodegradation of polyhydroxybutyrate (PHB) and its copolymer polyhydroxy butyrate‐co‐hydroxyvalerate (PHB‐co‐HV) was studied. Bacterial as well as fungal isolates were isolated from the local industrial ecosystem. All these isolates were tested for the degradation of the above polymers in assay agar medium as wel…
Pore surface engineering of mesoporous materials is fundamental for the development of highly selective sorbents, solid catalysts or drug delivery systems. In the present study, tailored mesoporous amine-functionalized polymer–silica composites are synthesized using a two-step mesopore surface-confined polymerization…
The surface oxidation behavior of LiBH(4) and NaBH(4) was investigated in view of the formation and structure of the surface oxidation and its effect on the hydrogen desorption kinetics. The sample surfaces were intentionally modified by exposure to oxygen in the pressure range from 10(-10) mbar up to 200 mbar. The in…
A multi-technique approach was adopted using UV/visible spectroscopy, fluorescence spectroscopy, dynamic light scattering (DLS), and transmission electron microscopy (TEM) in the characterization of cadmium sulfide (CdS) nanoparticles. CdS nanoparticle sizes could be determined by the Brus equation, which relates the…
An edge-modified tight-binding (TB) approximation has been developed, enabling us to clarify the energetic origin of the width-dependent band gap (E(G)) expansion of the armchaired and the reconstructed zigzag-edged graphene nanoribbons with and without hydrogen termination. Consistency between the TB and the density-…
Multilayer prototype actuators were demonstrated using (Bi1/2Na1/2)TiO3 [BNT]-based ceramics as active layers and Pt as internal electrodes. One of the BNT-based solid solutions, 0.68(Bi1/2Na1/2)TiO3–0.04(Bi1/2Li1/2)TiO3–0.28(Bi1/2K1/2)TiO3 (BNLKT4–28) has been selected as the an active layer and it showed a relativel…