Materials Literature
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Low-pressure alcohol catalytic chemical vapor deposition (LP-ACCVD), which is an ACCVD method at a lower pressure (<1 Pa) than that in the conventional method, has been attracting much interest because it enables the low-temperature growth of single-wall carbon nanotubes (CNTs). However, the growth rate of CNTs by LP-…
In the scope of material science, it is well understood that mechanical behavior of a material is temperature dependent. The converse is also true and for specific loading cases contributes to a unique thermal failure mechanism known as “heat explosion”. The goal for this paper is to improve the mathematical models fo…
A numerical simulation study was carried out to investigate the relative contributions of thermal and solutal Marangoni convections on transport structures in a liquid bridge under zero gravity. The liquid bridge in the model represents a three dimensional half-zone configuration of the Floating Zone (FZ) growth syste…
The kinetics of the reaction is essential for the synthesis of polyurethane. In this study, the reaction kinetics and polymerization conditions in two-step process of isophorone diisocyante (IPDI) and polypropylene glycol (PPG) with organo-tin mixed catalyst were investigated by chemical titration. The results showed…
The use of ultrasound for measuring elastic constants and phase transitions is well established.Standard measurements use piezoelectric transducers requiring couplant and contact with the sample.Recently, non-destructive testing (NDT) has seen an increase in the use of non-contact ultrasonic techniques, for example el…
Carbon nanotube (CNT) was considered as a good modified material to prepare CNT chemically modified electrode (CNT-CME) for the CNT novel physical and chemical properties. Many CNT-CMEs were prepared by different methods. But all the CNT-CME preparation process was two steps: firstly, growing CNT; then, fixing the CNT…
We studied the magnetization characteristics of the arrayed and stacked bulk superconductors. The bulks were made of GdBaCuO superconductor. Two-dimensional magnetic flux density distributions over bulks were measured after 2.0 T magnetic fields cooling at 77 K. The current densities in the bulks were estimated 108 A/…
The present work deals with the numerical and experimental analysis of a water flow confined by a finely meshed plastic wire screen. The experiment consists in the visualization of the complex menisci formed on the three dimensional confinement grid, using the confocal microscopy. The flow is simulated using the Volum…
We the authors Susumu Imashuku, Deh Ping Tee, Hiroko Seki, Hiroya Miyauchi, Osami Wada and Jun Kawai hereby wholly retract this Journal of Analytical Atomic Spectrometry article due to the way the data was presented, in order to maintain the accuracy of the scientific record. Signed Susumu Imashuku, Deh Ping Tee, Osam…
Metamaterials offer extraordinary optical properties, however they are challenging to make. We apply fiber drawing to fabricate volume metamaterials in quantity. We demonstrate metamaterials with engineered permittivity and permeability at THz.
A low-cost solid acid catalyst derived from kaolin and sulphuric acid, was utilized for the removal of thiophene from coking benzene. The effect of various factors, such as sintering temperature, sintering time, acid treatment temperature, acid treatment time and the acid content, were investigated to improve the cata…
A new approach for fabrication of polystyrene (PS) surface with atomic-scale surface roughness is presented. The obtained surface structure was investigated using X-ray reflectivity (XR) measurements in the temperature range between room temperature and 104°C which is close to the glass transition temperature Tg of bu…
Thermal conduction related mechanism of the super conducting systems have been very important and interesting area since last two decades. In the present estimation of thermal conductivity of Yba2Cu3O7superconductors, the automated reasoning approach has been considered by using a mathematical model. This model is dyn…
The activity concentrations and the gamma-absorbed dose rates of the naturally occurring radionuclides 226 Ra, 232 Th, and 40 K were determined for 40 soil samples collected from Tiruchirapalli, South India, using g-ray spectrometry. The average activity concentrations of 226 Ra, 232 Th, and 40 K in the soil samples w…
Cobalt (Co) films were prepared, using ion beam sputtering technique. Films were prepared by varying beam voltage from 700 to 1100 V at room temperature. The influence of ion beam energy on the density, surface roughness and thickness uniformity of Co film was investigated. X-ray reflectivity study shows that surface…
Les dépôts électrolytiques de chrome dur, utilisés pour protéger certaines pièces contre l’usure et la corrosion, vont disparaître à cause de l’utilisation de Cr(VI). L’évaluation environnementale de meilleures technologies en traitements de surface semble nécessaire pour innover dans ce domaine. Elle repose dans cett…
CCTO is believed to have a variety of potential applications due to its unusual high dielectric constant and very high thermal stability. In this paper, the dielectric properties of CCTO thin films and their current technical progresses are reviewed. It is found that the orientation of crystal axis, the average partic…
The objective of this study was to explore an alternative way to cool cows in time of heat stress. The procedure followed was to compare wetting the udder only to wetting the whole body. Twelve pregnant lactating Holstein cows were used in the study. The cows were exposed to four treatments each day over 4 days. The t…
I discuss the accuracy and computational time of the discrete dipole approximation (DDA) when applied to metal nanoparticles. The accuracy of the DDA can be made satisfactory by refining discretization (or increasing number of dipoles), but the required discretization level strongly depends on particle shape and refra…
Three kinds of activated carbons were prepared from Taixi anthracite by NaOH activation. As-obtained activated carbons were adopted as electrode materials to construct asymmetric and symmetric supercapacitors. The electrochemical properties of as-constructed supercapacitors in aqueous electrolyte (3.0M KOH) were inves…