Materials Literature
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Solid solutions of nonstoichiometric mixed cobalt–zinc ferrite nanoparticles Co0.73yZn0.73(1−y)Fe2.18□0.09O4, were prepared in order to study their magnetic properties as a function of cobalt content y. The saturation magnetization changes with increasing y due to the various occupancies of cations in tetrahedral and…
The interactions of a series of water-soluble dendritic phthalocyanines containing terminal carboxylate functionality with a range of surfactants in aqueous media have been investigated. Cationic surfactants, as compared with neutral and anionic counterparts, are much more effective to disrupt the molecular aggregatio…
An attempt is made to analyze the most important physical properties of manganites of the La-Ca-Mn-O type, which exhibit the colossal magnetoresistance effect. The primary focus is on the peculiarities of these compounds which are reflected in their crystalline, electronic, and magnetic structures and which determine…
Recombinant Staphylococcus xylosus and Staphylococcus carnosus strains were generated with surface-exposed chimeric proteins containing polyhistidyl peptides designed for binding to divalent metal ions. Surface accessibility of the chimeric surface proteins was demonstrated and the chimeric surface proteins were found…
A problem maxillofacial surgeons face is a lack of sufficient autogenous oral mucosa for reconstruction of the oral cavity. Split-thickness or oral mucosa grafts require more than one surgical procedure and can result in donor site morbidity. Skin has disadvantages of adnexal structures and a different keratinization…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTHydrophobic Assembling of a Coordination Nanobowl into a Dimeric Capsule Which Can Accommodate up to Six Large Organic MoleculesShu-Yan Yu, Takahiro Kusukawa, Kumar Biradha, and Makoto FujitaView Author Information Department of Applied Chemistry Graduate School of Eng…
Thick (∼5 μm) films of antiferroelectric compositions in the lead zirconate titanate stannate family of solid state solutions have been fabricated by sol–gel methods on platinum-buffered silicon substrates. Dielectric properties, electric field induced ferroelectric polarization, and associated elastic strain and the…
Micromechanical and electronic devices are a potential application for nanohoneycomb-structured diamond films, which were produced by oxygen plasma etching with porous anodic alumina films as masks to give highly ordered hexagonal hole arrays with high aspect ratios. The high refractive index and high transparency of…
Recent EPR and susceptibility measurements in ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{x}{\mathrm{MnO}}_{3}$ support the existence of a bottleneck EPR regime up to 1000 K quantitatively. The EPR linewidth and electrical conductivity follow the same temperature dependence in the range of 250 to 650 K predicted b…
Due to a demand by the aerospace industry, NASA has begun developing the next generation of polyimide foams which could be utilized to reduce vehicle weight for the X-33 and Reusable Launch Vehicle (RLV) programmes. The activity at NASA Langley Research Center focuses on developing polyimide foam and foam structures w…
A third generation dendron possessing one activated vinyl group linked to the core and 16 chlorines linked to the surface has been functionalized with various groups at the core (primary amine, phosphine, or azide), and on the surface (aldehyde, tertiary amine, or nitrile). These functionalized dendrons are used as bu…
This study uses the molecular dynamics computational technique to investigate the thermal conductivity of solid thin films in the direction perpendicular to the film plane. In order to establish a benchmark reference, the computations are based on the widely used Lennard-Jones argon model due to its agreement with exp…
We have used atomic force microscopy to investigate the patterns obtained by isothermal crystallization of quasi-2-D monolayers of poly(ethylene oxide) adsorbed onto bare silicon wafers. These monolayers were prepared by a pseudo-dewetting process. Fingerlike branched structures were observed with a characteristic wid…
A low-temperature CVD process for thin-film magnet fabrication is reported here with a variety of rigid and flexible substrates (see also cover). These polymeric magnets have enhanced air stability with respect to those prepared from solution, and an opportunity is provided for the preparation of a broad range of patt…
Patterns of diatom species distribution in relation to total N (TN), total P (TP), and other environmental variables from riffle sites on 2 streams in southern Ontario, Canada, were determined using canonical correspondence analysis (CCA). Relationships with TN and TP were sufficiently strong to develop weighted-avera…
We present a systematic electron-spin-resonance (ESR) study in single crystals of ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3}(0<~x<~0.2).$ The temperature dependence of the ESR linewidth marks all significant transitions between both orthorhombic ${(O}^{\ensuremath{'}},O)$ and the rhombo…
Liquid-solid transition of Laponite suspensions at very low ionic strength: Long-range electrostatic stabilisation of anisotropic colloids, P. Levitz, E. Lecolier, A. Mourchid, A. Delville, S. Lyonnard
The dynamics of electronic energy transfer (EET) for a series of spherical porphyrin arrays based on different generations of poly(propylene imine) dendrimers have been investigated using time-resolved fluorescence anisotropy measurements (TRAMS) in a glass environment. The first, third, and fifth generation dendrimer…
Gel‐glasses of various compositions in the x ZrO 2 . (10 – x )SiO 2 system were fabricated by the sol–gel process. Precipitation due to the different reactivities between tetraethyl orthosilicate (TEOS) and zirconium(IV) n ‐propoxide has been eliminated through the use of 2‐methoxyethanol as a chelating agent. Thermal…
The Raman shifts as functions of pressure were measured for the radial breathing mode and tangential modes in carbon nanoropes containing (10,10) and (17,0) single-walled tubes. An abrupt decrease in the rate of change of the Raman shift with pressure for the tangential modes, and the disappearance of the radial breat…