Materials Literature
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We present a fast computational technique for the electrochemical impedance of solid oxide fuel cells (SOFCs) based on detailed electrochemistry and transport models. The technique is based on the transient numerical simulation of a fast, submicrosecond potential step followed by current relaxation. The impedance is r…
Highly monodispersed thiol-functionalized nanoporous silica spheres with diameters in the submicron range were successfully synthesized via a surfactant-directed co-condensation of tetramethylorthosilicate (TMOS) and 3-mercaptopropyltrimethoxysilane (MPTMS) in a very dilute alkaline methanol–water mixture. The incorpo…
Surface waves, named here as Dyakonov-Tamm waves, can exist at the planar interface of an isotropic dielectric material and a chiral sculptured thin film (STF). Due to the periodic nonhomogeneity of a chiral STF, the range of the refractive index of the isotropic material is smaller but the range of the propagation di…
Waterborne polyurethane (WBPU) adhesives were prepared by the pre-polymer process using different polyester polyols (M n = 2000), namely poly(tetramethylene adipate glycol) (PTAd) and poly(caprolactone glycol) (PCL), and polyether polyols (M n = 2000), namely poly(tetramethylene oxide glycol) (PTMG) and poly(propylene…
The inhibitive effect of the gum exudate from Acacia seyal var. seyal on the corrosion of mild steel in drinking water was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The results obtained show that gum exudates could serve as effective inhibitors for the…
The premier observation on the enhanced light emission from such a metal-SiO(x)-Si light emitting diode (MOSLED) with Si nano-pyramids at SiO(x)/Si interface is demonstrated at low biases. The Si nano-pyramids exhibits capability in providing the roughness of the SiO(x)/Si interface, and improving the Fowler-Nordheim…
The interaction between gas bubbles and ultrasound in water leads to acoustic cavitation under specific experimental conditions. Acoustic cavitation has been used in a number of areas, these include therapeutic applications, contrast imaging, synthesis of nanomaterials, production of nanoemulsions, treatment of food m…
The construction of a pulsed electron gun for ultrafast reflection high-energy electron diffraction experiments at surfaces is reported. Special emphasis is placed on the characterization of the electron source: a photocathode, consisting of a 10 nm thin Au film deposited onto a sapphire substrate. Electron pulses are…
In the present work, we succeeded in alternatively depositing inorganic nanoparticles and functionalized DNA bases onto the water/oil interface from the water and oil bulk phases. The ligands used were functional thymines and adenines. Their thiol and phosphate groups were used to cap inorganic nanoparticles and their…
Carboxylic group functionalized mesoporous silicas (CFMSs) were successfully synthesized by using cationic surfactants as templates and carboxyethylsilanetriol sodium salt (CES) as a co-structure directing agent (CSDA). Well ordered two-dimensional (2D) p6mm, cubic Fmm, intergrowth of Fmm and P63/mmc, and cubic Fdm wi…
For various composite electrodes with the same composition 80( % , % CB, % PMMA)-20(EC-PC), and made by the solvent casting technique, the cycled capacity varies between 100 and depending on the initial volatile solvent concentration. For a concentration below the optimal one, the electrode dispersion exhibits a yield…
Exudates gums from Pachylobus edulis (PE) and Raphia hookeri (RH) were evaluated as corrosion inhibitors for aluminium in HCl using weight loss and thermometric measurements at 30 -60 o C. The exudates were found to retard corrosion rate of aluminium. The inhibition efficiency (%1) increased with increase in concentra…
A series of corrole-1,8-naphthalimide dyads has been synthesized. The dyads were assembled in a convergent fashion from two fragments via a corrole forming reaction. Central to the success of the synthetic strategy was the preparation of suitably functionalized derivatives of naphthalene-1,8-carboxymide. Six different…
The vital need of studying the toxicological profile of carbon nanotubes (CNTs) has emerged from the rapidly enhancing utility of CNTs in the field of nanobiology and drug delivery. This review highlights the vivid aspect of CNTs’ toxicity comprising of in-vitro to in-vivo toxicological profile vis-à-vis the various p…
The dielectric properties, such as dielectric constant, volume resistivity and dielectric loss factor, of sisal/coir hybrid fibre reinforced natural rubber composites have been studied as a function of fibre loading, fibre ratio, frequency, chemical modification of fibres and the presence of a bonding agent. The diele…
Polished 310 stainless steel coupons were exposed isothermally in a horizontal tube furnace at 500 ° C for 1 – 168 h . The exposure gas consisted of N 2 with 5% O 2 and 500 ppm HCl(g). The corroded samples were analyzed by X-ray diffraction, focused ion beam microanalysis, scanning electron microscopy with energy-disp…
Single-walled carbon nanotubes (SWNTs) have unique structural, mechanical, thermal and electrical properties, which make them attractive and important building blocks for nanotechnology. Orientated assembly of SWNTs presents a crucial prerequisite for both fundamental research at the individual SWNT level and nanotube…
Porous ultralow- k films are required by the microelectronics industry as interlayer dielectrics for technologies and below. These porous insulating films can be deposited by plasma-enhanced chemical vapor deposition using a porogen approach. It consists of the codeposition of a matrix precursor and a sacrificial orga…
This paper reports the thermal and electrical characteristics of a heated microcantilever in air and helium over a wide range of pressures. The cantilever heater size modulates thermal conductance between the cantilever and its gaseous surroundings; and the Knudsen number, Kn characterizes this thermal conductance. Wh…
Three new polymetallic nickel(II) phosphonate complexes are reported; in one cage the twelve nickel centres are arranged at the vertices of a truncated tetrahedron in a similar manner to a Keggin ion.