Materials Literature
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In this article, we have seen how high-frequency system resonances, triggered by power electronic devices, may enhance both electrical and thermal stress on an insulation system. An important lesson from this study is that even an insulation system that is very well designed according to present standards may fail if…
Present investigation evaluates the adsorption of Pb(II), Cd(II) and Zn(II) ions on plant sand of National Aluminum Company, Orissa, India. The XRD pattern and FTIR spectra showed goethite, alumina and silica as the major phases in the sand. Effects of various parameters such as time, pH, temperature, metal ions and a…
The paper reports on the optical properties of ZnO nanostructures elaborated on a zinc foil substrate by a simple chemical approach. The doping type and density of the ZnO nanostructures were evaluated using electrochemical impedance spectroscopy. XRD diffraction patterns and Raman spectroscopy were used to study the…
Abstract This paper reviews the literature on rubber-brass bonding that has been published in approximately the last decade. Previous reviews of this topic by Van Ooij were published in 1979, 1984, 1991 and 2001. The scientific and technical literature is reviewed exhaustively; the patent literature is reviewed in a m…
The effect of ammonia treatment in field natural rubber (NR) latex with different storage period time on the properties of concentrated NR latex and stability of skim latex was investigated. Fresh NR latex was treated with various ammonia contents such as 0.35, 0.60 and 0.80% w/w, and then they were centrifuged to get…
Submicrometer sized pure cubic phase, Eu 3+ doped, and Yb 3+ /Er 3+ co-doped α-NaYF 4 particles with octahedral morphology have been prepared in acetic acid. The acetate anion plays a critical role in the formation of such symmetric octahedral structures through its selective adsorption on the (111) faces of the produ…
This paper continues our previous work on preparation of truncated triangular silver nanoparticles. The method proceeds with reaction of silver nitrate with hydrazine in the presence of sodium citrate in aqueous solution, in which triangular nanoparticles are formed in a few minutes with some spherical ones. In partic…
Si-rich-SiO2(SRSO)/SiO2 multilayers (MLs) have been grown by reactive magnetron sputtering. The presence of silicon nanoclusters (Si-ncls) within the SRSO sublayer and annealing temperature influence optical absorption as well as photoluminescence. The optimized annealing temperature has been found to be 1100 °C, whic…
We report a family of heteronanotubes circumferentially consisting of a curled carbon ribbon and a curled boron nitride ribbon from first-principles calculations. By molecular dynamics simulations and total energy calculations, the stability of the C-BN heteronanotubes (C-BNNTs) is predicted to be comparable to that o…
The energy transfer from fluorene-based polymers such as poly(9,9-dioctylfluoreny-2,7-diyl) (PFO) and poly[(9,9-dioctylfluorenyl-2,7-diyl)- co -(bithiophene)] (F8T2) to single-walled carbon nanotubes (SWNTs) is proved by photoluminescence excitation (PLE) and fluorescence lifetime studies. The excitation wavelength to…
The local electric fields in the vicinity of the tips of metallic nanotubes are calculated. The variation in the field enhancement factor as a function of internanotube separation, anode-substrate separation, and height and radius of the nanotube is reported. Calculations show that the field induced electron emission…
Cd-enriched ambient, high quality n -type CdSe nanobelts (NBs) with various electron concentrations (from ∼10 16 to 10 18 cm −3 ), which can meet different device requirements, were synthesized via the chemical vapor deposition (CVD) method. The electron mobilities are much higher than those reported previously for Cd…
Photoluminescence in the UV-VIS region is a very sensitive analytical method and also an important optical property of glasses and glass ceramics for different applications which depends strongly on active centers, surrounding host glass composition and their interactions. Fluoride, phosphate, and silicate glasses of…
Polythiophene films were synthesized by electrolytic polymerization, and the synthetic parameters and their thermoelectric properties, i.e., Seebeck coefficient and electric conductivity, were investigated in detail. The Seebeck coefficient tended to decrease with increasing electric conductivity. However, the thermoe…
We present a study on electric double-layer capacitors in organic electrolytes based on symmetrical bulky tetraalkylammonium cations, using activated carbons with adjusted pore size distribution. The results reveal that a close fit of electrode pore size distribution to the size of electrolyte ions can lead to a satur…
In this study, the capability of artificial neural networks and multiple logarithm regression methods for modeling seam performance of commercial woven fabrics based on seam puckering, seam flotation and seam efficiency were investigated. The developed models were assessed by verifying Mean Square Error (MSE) and Corr…
Modulation of water exchange in lanthanide(III)-DOTA type complexes has drawn considerable attention over the past two decades, particularly because of their application as contrast agents for magnetic resonance imaging. LnDOTA-tetraamide complexes display unusually slow water exchange kinetics and this chemical prope…
Elastic properties of the alloys Ti 3 AlC and T i 3 AlN are derived from the first-principles total energy calculations based on the full-potential linear muffin-tin Orbital (FP-LMTO) method. From the computed elastic constants, theoretical values of Young's modulus, shear modulus, Poisson's ratio, sound velocities an…
Controlling conductivity via doping in semiconductor quantum dots is an important part of nanoparticle research. In this report, doping of CdSe quantum dots with indium and tin is explored. High-resolution nanoprobing confirms the presence of indium and tin in the particles and the inclusion of indium into the particl…
The NEA Working Group on Fuel Safety (WGFS) is tasked with advancing the current understanding of fuel safety issues by assessing the technical basis for current safety criteria and their applicability to high burn-up and to new fuel designs and materials. The group aims at facilitating international convergence in th…