Materials Literature
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We predict that a ferroelectric phase can be induced in otherwise nonferroelectric binary oxides like BaO, EuO and ${\text{Er}}_{2}{\text{O}}_{3}$ by a strong enough stress $\ensuremath{\sigma}\ensuremath{\sim}\ensuremath{\mu}/R$ present under the curved surface in nanowires due to intrinsic surface stress $\ensuremat…
DC magnetoresistive effects were observed in above-percolation-threshold loaded Fe-filled carbon nanotube/polyurethane-urea composite samples. A phenomenological model is derived from interpretation of resistance relaxation for a range of axial strains. The large instantaneous magnetoresistance of + 90% observed at lo…
Presented is an experimental investigation into the characteristics of a particular styrene-based shape memory polymer, Veriflex ® . Tensile, 3 point bend, and creep tests are conducted yielding the Young’s modulus, yield strength, flexural modulus, flexure strength, and creep modulus of the polymer both above and bel…
Y 2− x Pr x Ru 2 O 7 (0≤ x ≤2) pyrochlore powders were prepared using a precipitation method, which allowed control of their composition and morphology. Materials structure and morphology were characterized by X‐ray diffraction analysis and field emission scanning electron microscopy, respectively. All the synthesized…
A series of CeFe(1-x)Co(x)AsO oxyarsenide compounds with Co doping on iron sites (x = 0-0.2) have been synthesized by a solid state reaction method. The effects of Co doping on the electrical transport properties and superconductivity were analyzed with a special emphasis on the analysis of thermopower. Undoped CeFeAs…
In this work we analyzed the structural relaxation times as a function of both temperature and pressure in terms of the entropic models by using dielectric and PVT measurements data presented in our previous research on the ionic liquid verapamil hydrochloride [Z. Wojnarowska, M. Paluch, A. Grzybowski, et al., J. Chem…
We have studied the electrocatalytic effects of polythiophene-based conducting polymers toward the redox reactions of the dilithium salt of the thiadiazole-based dithiol compound 2,5-dimercapto-1,3,4-thiodiazole (DMcT-2Li) via cyclic voltammetry (CV), rotating-disk electrode voltammetry, and electrochemical impedance…
The size stability of nanoparticles is crucial from an application point of view. We probe, using Raman spectroscopy, particle size evolution of CdS nanoparticles by varying laser power. Multiphonon resonant Raman scattering has also been demonstrated. With increase in laser power, the intensity ratio of 2-longitudina…
We studied inter-dot distance dependence of photoluminescence (PL) properties in CdSe quantum dot (QD) systems. It is found from PL lifetime measurements that there are two types of resonance energy transfer processes between different-sized QDs; one caused by Förster-type coupling in the shorter distance region and t…
Vanadia- and/or ceria-incorporated SBA-15-like materials were prepared by impregnation and one-pot hydrothermal synthesis procedures at different solution pH values. The pH of the synthesis solution was found to have a very strong effect on the pore structure, chemical composition, and morphology of the synthesized ma…
Amphiphilic block copolymers based on hydrophobic polysulfides (poly(propylene sulfide), PPS) and hydrophilic polyethers (poly(ethylene glycol), PEG) have been used to solubilize and disperse single-walled carbon nanotubes (SWNTs). The obtained highly concentrated aqueous dispersions are stable for months. The factors…
Coaxial electrospinning was developed for simultaneously electrospinning two different polymer solutions into core/shell nanofibers, or encapsulated bioactive molecular and drugs into polymer nanofibers for controlled release. In this study, heparin encapsulated poly(L-lactic acid-co--caprolactone) [P(LLA-CL)] core/sh…
Within the framework of density-functional theory, we investigate the nature of magnetism in various families of Fe-based superconductors. (i) We show that magnetization of stripe-type antiferromagnetic order always becomes stronger when As is substituted by Sb in LaOFeAs, ${\text{BaFe}}_{2}{\text{As}}_{2}$, and LiFeA…
Degradable magnesium alloys are new materials for implants used in orthopedic and trauma surgery. The aim of this study was to investigate the influence of degradable magnesium alloys on the function of dendritic cells (DC) as these cells represent the major antigen presenting cells of the body. MgP (pure magnesium),…
The effects on the physical and electro-optical properties of ferroelectric liquid crystals (FLCs) after the doping of a dilute suspension of ferroelectric nanoparticles (BaTiO3) have been studied. Due to the permanent electric dipole moments of the ferroelectric nanoparticles, the spontaneous polarisation of FLCs wit…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTTrue Surface Topography and Nanomechanical Mapping Measurements on Block Copolymers with Atomic Force MicroscopyDong Wang*, So Fujinami, Ken Nakajima, and Toshio NishiView Author Information WPI Advanced Institute for Materials Rese…
The need for new and effective/efficient antibacterial therapeutics and diagnostics is necessary if we want to be able to maintain and improve the protection against pathogenic bacteria. Bacteria are becoming increasingly resistant to traditionally used antibiotics and as a result are a major health concern. The numbe…
Lattice dynamics calculations and high-pressure Raman scattering study of ${\text{Bi}}_{2}{\text{W}}_{2}{\text{O}}_{9}$, which is an $m=2$ member of the cation-deficient bismuth layered Aurivillius family of compounds, are presented. These studies showed the onset of two reversible second-order phase transitions near…
Candida antarctica lipase B (CALB) was found to be an efficient catalyst for copolymerization of diesters with amino-substituted diols to form poly(amine-co-esters) in one step. The copolymerization reactions were carried out at 50-100 degrees C in two stages: first stage oligomerization under 1 atm pressure of nitrog…
In this article, we report the fabrication of ordered hybrid structures composed of ZnO nanowires and a polymeric matrix with a polymer precursor infiltrating the nanowire arrays. The antireflective properties of the resulting ZnO nanowire-embedded polydimethylsiloxane composite (ZPC) were investigated at various ZnO…