Materials Literature
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We systematically investigate the effect of the oxygen isotope in $({\mathrm{Pr}}_{1\ensuremath{-}x}{\mathrm{Sm}}_{x}{)}_{0.7}{\mathrm{Ca}}_{0.3}{\mathrm{CoO}}_{3}$ which shows a crossover with $x$ from ferromagnetic metal to the insulator with spin-state transition. A striking feature is that effect of oxygen isotope…
A series of barium substituted ${\mathrm{La}}_{0.5}{\mathrm{Sr}}_{0.5\ensuremath{-}x}{\mathrm{Ba}}_{x}\mathrm{Mn}{\mathrm{O}}_{3}$ materials has been synthesized and investigated using neutron powder diffraction. We show that Ba substitution suppresses the low-temperature orbital ordering that has been previously obse…
Abstract New methacrylate monomers, namely 4‐methacryloyloxyphenyl‐4′‐fluorostyryl ketone and 4‐methacryloyloxyphenyl‐4′‐ethylstyryl ketone comprising a free radical polymerizable group and a photocrosslinkable group, were synthesized by reacting the respective hydroxychalcones with methacryloyl chloride in the presen…
This article reports on the properties of polyurethane rigid foams, which are used as insulating materials. Most polyurethane rigid foams, derived from cellular polymers, are unstable and tend to crack when acted upon by external forces. These foams are classified as a subgroup of cellular polymers, and thus their low…
A simple model of thermoluminescence (TL), in which the trap and the recombination centre exist in the same defect complex, is assumed. It is called the localized recombination model (LRM). The analytical expression derived for this model turns out to be of first order irrespective of whether the system is recombinati…
Avrami and Ozawa's combined analysis was employed to study the nonisothermal crystallization kinetics of Polypropylene (PP): CaSO4 (of 12 and 22 nm) composites using a Differential Scanning Calorimeter (DSC). The parameters, such as Avrami's exponent (n) and growth rate constant (Zt), that characterized the system of…
We investigate solid-liquid transitions in NaCl at high pressures using molecular dynamics simulations, including the melting curve and superheating/supercooling as well as solid-solid and liquid-liquid transitions. The first-order B1-B2 (NaCl-CsCl type) transition in solid is observed at high pressures besides contin…
For both hydrophilic and hydrophobic surface preparation, using the combination of advanced surface treatment and tuned annealing process, void free Si/Si direct bonding have been successfully obtained. The pre-bonding procedure involves only low temperature (<500{degree sign}C) treatment in order to be compatible…
Durch das Anbinden eines hydrophoben Peptids an Polybutadien-block-polyethylenoxid verschieben sich die Morphologien des Systems in Wasser zu solchen mit geringerer Krümmung – von kugelförmigen Micellen zu wurmartigen Micellen und Vesikeln (siehe Bild; PBD=Polybutadien, PEO=Polyethylenoxid, wEO: Gewichtsanteil des hyd…
Oligodeoxynucleotide nanostructure formation in the presence of polypropyleneimine dendrimers and their uptake in breast cancer cells, Chen, Alex M, Santhakumaran, Latha M, Nair, Sandhya K, Amenta, Peter S, Thomas, Thresia, He, Huixin, Thomas, T J
We show that densification of silica glass at ambient pressure as observed in irradiation experiments can be attributed to defect generation and subsequent structure relaxation. In our molecular dynamics simulations, defects are created by randomly removing atoms, by displacing atoms from their nominal positions in an…
In this paper we will present the fabrication and properties of reactively co-sputtered Al2O3 layers, being a very promising host material for active integrated optics applications such as rare- earth ion doped laser devices. The process optimization towards a reactive co-sputtering process, which resulted in stable,…
Creep deformation tests at room temperature were carried out on nanocrystalline $(n\text{\ensuremath{-}})$ Au prepared by the gas-deposition method, where the mean primary grain size was $\ensuremath{\sim}20\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ but most of the primary grains formed clusters with a mean size of $\ens…
In the nanometer device era, surface morphology of atomic level becomes one of critical issues for device performance. The surface morphology of atomic level was evaluated in various wafer types and surface indexes. It was found that a hydrogen anneal wafer has the largest terrace comparing to other wafers. It is poss…
The magnetocaloric effect (MCE) of half-metallic CrO 2 particles has been studied with respect to particle size on the nanometre scale. Results from superconducting quantum interference device (SQUID) measurements indicate that acicular CrO 2 particles with a length of 400 nm yield a large magnetic entropy change Δ S…
A mathematical model for treating multicomponent equilibrium in polymer networks is developed and tested against experimental data. Equations and numerical solution procedures for treating the full equilibrium problem of a binary mixed solvent in contact with a cross-linked polymeric network are provided. Case studies…
We have studied the influence of plasticization on the microscopic dynamics of a glass-forming polymer. For this purpose we studied polyvinylchloride (PVC) with and without the commercially used plasticizer dioctylphthalate (DOP). We used dielectric spectroscopy and inelastic neutron scattering employing the neutron s…
Ligand-stabilized nanocrystals (NCs) were strongly bound to the nanotube surfaces by simple van der Waals forces. Linear arrays of CdSe and InP quantum dots were formed by self-assembly using the grooves in bundles of carbon single-walled nanotubes (SWNTs) as a one-dimensional template. A simple geometrical model expl…
The formation of light-emitting porous silicon (PSi) in a HF solution by adding an oxidizing agent KIO 3 is presented. The PSi layers are formed by photoetching under Xe lamp illumination. The use of a Xe lamp enables the formation of large PSi layers on n-Si substrates. Yellow photoluminescence peaking at ∼2.0 eV is…
The effect of alkali metal (M) chloride or triflate supporting electrolytes (0.1-1.0 mol L(-1)) on the midpoint potential E(m) of the aqueous AlW12O40(5-/6-) couple in cyclic voltammetry, after correction (E(corr)) for liquid junction potentials, can be represented in terms of ionic strength according to the extended…