Materials Literature
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Lipophilic quantum dots (QDs, CdSe/ZnS) were encapsulated into size-controlled SiO 2 beads by reflux. Slow silanization of QDs by adjusting the amount of tri- n -octylphosphine oxide (TOPO) and tetraethyl orthosilicate (TEOS) in toluene solution is the key to maintaining the initial photoluminescence efficiency. The s…
Abstract The data on the cladding mechanical response under rapid deformation are crucial for the safety assessment of LWR fuel rods for reactivity initiated accident (RIA) and for spent fuel shipping and storage cask-drop accidents. The reported data on the mechanical properties of the irradiated cladding under high…
In molecular dynamics simulations single-domain ferroelectric water is produced under ordinary ambient conditions utilizing carbon nanotubes open to a water reservoir. This ferroelectric water diffuses while keeping its proton-ordered network intact. The mobile/immobile water transitions and the step-wise changes in n…
Abstract Mode I and II fracture studies were performed from quasistatic to low velocity impact rates on polymethyl methacrylate (PMMA) and polycarbonate (PC). Mode II tests used an angled double‐edge notched specimen loaded in compression. The shear banding response of PMMA is shown to be highly sensitive to rate, wit…
Abstract The p‐type Ca3 − xBixCo4O9 (p‐Co349/Bix) and n‐type Ca1 − ySmyMnO3 (n‐Mn113/Smy) oxide thermoelectric (TE) materials were synthesized by the self‐ignition method and consolidated by a sintering technique. The effects of Bi and Sm dopant partial substitution on TE properties were investigated. At 973 K, the fi…
Shape memory polymer (SMP) is being used in many engineering fields due to its shape memory effect and the advantages of large recoverable strain, excellent manufacturability, light weight, low cost and bio-degradability. Therefore it is of practical interest to investigate its thermo-mechanical behaviors. In this pap…
Modification induced by energetic ion in polyvinylchloride (PVC)/carbon black (CB) composites was studied using impedance gain-phase analyzer, differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and atomic force microscopy (AFM). Different concentrations of CB were dispersed in PVC films. These…
Effects of nitrogen defects on the electrical properties of RE(2)O(3) (RE = Nd, Gd, Er, Y) and ZrO(2) have been investigated by equilibration in ammonia (NH(3)) atmospheres in the temperature range 1000-1200 °C. The electrical conductivity in ammonia corresponded to that in H(2)-Ar mixtures of similar pO(2). However,…
Abstract In this article, we present an investigation of the structural development of poly(ethylene terephthalate) (PET) during uniaxial stretching above the glass‐transition temperature; this followed a statistical design of experiment approach to determine the influence of the stretching variables on the structural…
This study aims to develop computer models, with a microstructure representative of the PGA graphite, to contribute to the understanding of the relationship between the amount of porosity, the load-displacement behaviour and crack propagation. The project is in two linked parts, the first provides a model of the porou…
Existence of weak solutions is proved for a system of nonlinear parabolic equations/inequalities describing evolution of magnetization, temperature, magnetic field, and electric field in electrically-conductive unsaturated ferromagnets. The system is derived from a recently-proposed thermodynamically-consistent contin…
Two bis(unsymmetrical diimine) complexes of (L(NO(2))(ϕ1))(L(NO(2))(ϕ2))M(II)Cl(2) family with M = Fe and Mn, are reported (L(NO(2))(ϕ) = (E)-3-nitro-N-(pyridine-2-ylmethylene)aniline; ϕ = dihedral angle between the diimine unit including pyridine ring and the phenyl ring planes). Pure tcc-(L(NO2)(33.6))(L(NO2)(79.3))…
The processing conditions, microstructure and dielectric properties of strontium bismuth titanate (SBT) were studied by means of Ca substitution in the strontium site referred to hereinafter as SCBT. The mechano-chemical activation method permits one to reduce the particle size of the initial products, so the surface…
${\text{Dy}}_{2}{\text{Mo}}_{4}{\text{O}}_{15}$ crystal was investigated by high-pressure Raman spectroscopy experiments. The assignment of vibrational modes at ambient pressure was made based on lattice-dynamics calculations and the results helped us also to discuss high-pressure transformations observed in this mate…
Abstract A series of superhydrophobic poly(methacryloxypropyltrimethoxysilane, MPTS‐b‐2,‐2,3,3,4,4,4‐heptafluorobutyl methacrylate, HFBMA)‐grafted silica hybrid nanoparticles (SiO2/PMPTS‐b‐PHFBMA) were prepared by two‐step surface‐initiated atom transfer radical polymerization (SI‐ATRP). Under the adopted polymerizati…
The dielectric property and the electronic structure of calcium aluminium niobate, Ca2AlNbO6 (CAN) synthesized by solid state reaction technique are investigated. The field dependence of dielectric response, loss tangent and conductance is studied in the temperature range from 303 to 443 K and in a frequency range fro…
The unique properties of peptides have led to their use in diverse applications in medicine and nanotechnology. In order to demonstrate their utility as multifunctional, selective, adhesion layers in electronic devices, we demonstrate here peptide mediated synthesis approach for the formation of continuous gold films…
Fe2O3 nanoparticles were synthesized by co-precipitation method and different concentrations (6 and 10 wt%) of it were dispersed in a poly (methyl methacrylate) (PMMA) matrix, through a soft chemical casting method. These films were irradiated with 50 MeV Li+3 ions at a fluence of 5 × 1012 ions/cm2. Dependence of diel…
K. Ramesha, M. Prashanthaa, N. Koteeswara Reddyb & E. S. R. Gopala a Department of Physics , Indian Institute of Science , Bangalore, 560012 b School of Chemistry , Tel Aviv University , Tel Aviv, 69978, Israel Nanostructured carbon nitride films were prepared by pyrolysis assisted chemical vapour deposition. A two zo…
The condition for a negative index of refraction with respect to the vacuum index is established in terms of permittivity and permeability susceptibilities. It is found that the imposition of analyticity to satisfy the Kramers-Kronig relations is a sufficiently general criterion for a physical negative index. The sati…