Materials Literature
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Fluxmetric and transmission line methods have been combined in the wideband characterization of Mn–Zn and Ni–Zn soft ferrites. The real μ′(f) and imaginary μ″(f) permeability components and the energy loss W(Jp,f) have been obtained in ring samples, for defined values of the peak polarization Jp up to 1 GHz. The role…
The magnetic properties of (ZnO)1/(CuO)1 (001) superlattice have been investigated by means of ab initio calculations based on spin density functional theory. The ZnO/CuO superlattice is found to be spin polarized, and the calculated band structure suggests a 100% polarization of the conduction carriers. The analysis…
The magnetic and electronic properties of a Tm-based ``double-decker'' phtalocyanine complex are extensively investigated by several spectroscopic (optical absorption, inelastic neutron-scattering) and bulk (specific-heat) techniques. The resulting low-energy spectrum is exploited to obtain direct information on the l…
Layer-by-layer (LBL) assembly of silica nanoparticles is investigated as a means of controlling the surface wetting properties of gold electroplated onto 316 L stainless-steel substrates while maintaining a low electrical surface contact resistance. The strong polyelectrolyte acrylamide/beta-methacryl-oxyethyl-trimeth…
Increase in bacterial resistance to most of conventional antibiotics has emerged as one of the most challenging problems for the researcher in the field of biomedical science and engineering. This therefore augers well to look for possible alternative antimicrobial agents that can overcome this resistance. Nanoparticl…
Single-walled carbon nanotubes (SWNTs) functionalized with -COOH (along with some sulphonation and nitration), and/or modified with chitosan were prepared and tested for their singlet oxygen ((1)O(2)) production. The emission from (1)O(2) observed upon SWNT irradiation at 532 nm was due to a two-photon process, while…
In this letter, we analyze the quasistatic and dynamic magnetoelectric responses of multiferroic composite nanofibers consisting of both ferroelectric and ferromagnetic phases and demonstrate that the nanofibers exhibit magnetoelectric responses orders of magnitude higher than multiferroic composite thin films of simi…
A Stressed Liquid Crystal (SLC) is proposed for application as a single panel retardance element in a Fourier transform (FT) spectrometer. Volume alignment in SLCs increase the maximum retardance and subsequent FT resolution by creating greater path lengths. Here, the relationship between transmission and shear for th…
The physical properties of novel sulfur-containing biopolymers, poly[(3-hydroxybutyrate)-co-(3-mercaptopropionate)]s [P(3HB-co-3MP)s], have been investigated in detail by(1)H and (13)C NMR spectroscopy, wide-angle X-ray diffraction (WAXD) analysis, DSC, and FT-IR spectroscopy. Based on a solvent/non-solvent (chlorofor…
HRXRD is a very sensitive and non destructive technique to determine the strain in thin layer materials such as electron guides or the strain induces by the second order package of SOCs. In reciprocal space mapping (RSM), it is possible to separate the elastic component of the scattered intensity from the diffuse one.…
Femtosecond x-ray diffraction provides direct insight into the ultrafast reversible lattice dynamics of materials with a perovskite structure. Superlattice (SL) structures consisting of a sequence of nanometer-thick layer pairs allow for optically inducing a tailored stress profile that drives the lattice motions and…
The energy levels and local structures of Eu<sup>3+</sup> incorporated in the lattice and surface sites of ZnO nanocrystals\nwere investigated based on the high-resolution fluorescence spectra at 10 K. Radiative emissions from <sup>5</sup>D<sub>1</sub>\nwere first observed for Eu<…
Previous studies on the calcitic seminacre of the craniid brachiopod Novocrania have never fully resolved the crystallography of its constituent calcite crystals. With this aim, we studied the tablets forming the foliated-like and seminacre layers of this brachiopod by means of scanning electron microscopy coupled to…
Abstract A novel plasma stamp has been developed allowing selective plasma treatment and coating of flat surfaces using dielectric barrier discharges at atmospheric pressure. The stamp consists of a flat carrier material covered with photoresist. The resist is structured to form cavities in which the plasma is burning…
We present the results of imaging cylinder-forming poly(styrene- block -methyl methacrylate) diblock copolymer at temperatures high enough to show polymer domains evolving. Atomic force microscopy movies of morphological polymer evolution are analyzed to shed light on the formation of domains as well as the mechanism…
Optical response of a rare earth (RE)-doped SiO2 layer is known to deteriorate markedly at room temperature due to RE clustering. The key challenge is therefore to probe the ongoing processes at the microscopic level and the subsequent impact on the luminescence properties with increasing RE concentration. Here, we re…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTUnexpected Mechanical Properties of Functionalized Polypropylene: Tensile Test, Charpy Impact Tensile Test, DSC, and WAXD Analysis of Poly(5-hexen-1-ol-co-propylene)Yutaka Iizuka, Jun-ichi Sugiyama, and Hideaki Hagihara*View Author…
ADVERTISEMENT RETURN TO ISSUECommunication to the...Communication to the EditorNEXTLow-Bandgap Pyrazine Polymers: Ladder-Type Connectivity by Intramolecular S···N(sp2) Interactions and Hydrogen BondsYong-Hui Tian and Miklos Kertesz*View Author Information Department of Chemistry, Georgetown University, 37th & O Street…
Abstract Biodegradable copolymers of poly(lactic acid)‐block‐poly( ε ‐caprolactone) (PLA‐ b ‐PCL) were successfully prepared by two steps. In the first step, lactic acid monomer is oligomerized to low molecular weight prepolymer and copolymerized with the ( ε ‐caprolactone) diol to prepolymer, and then the molecular w…
Real-time (RT) modeling is a recognized approach to monitor advanced systems and to improve control capabilities. Applications of RT models are commonly used in the automotive and aerospace fields. Starting from existing components and models developed in TRANSEO[REF], a new approach, called the multipurpose RT approa…