Materials Literature
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Although relatively resistant to oxidation, polycarbonate-based polyurethanes (PCNUs) are degraded by monocyte-derived macrophages (MDM) by a co-mediated mechanism involving both hydrolytic and oxidative pathways. Since a previous study showed that PCNU pretreatment with H(2)O(2) modulated degradation by esterases, hu…
The development of magnetic Heusler compounds, specifically designed as materials for spintronic applications, has made tremendous progress in the very recent past [1–21]. Heusler compounds can be made as half-metals, showing a high spin polarization of the conduction electrons of up to 100% [1]. These materials are e…
Abstract Selected joaquinite minerals have been studied by Raman spectroscopy. The minerals are categorised into two groups depending upon whether bands occur in the 3250 to 3450 cm −1 region and in the 3450 to 3600 cm −1 region, or in the latter region only. The first set of bands is attributed to water stretching vi…
Porous Ba 0.5 Sr 0.5 TiO 3 (BST) ceramics were fabricated by the traditional solid‐state reaction process, and their structural, microstructural, dielectric, and tunability properties were systemically investigated. Compared with the fully dense BST samples, porous samples exhibit smaller grain sizes, a more uniform m…
Catalytic chemical vapour deposition (CCVD) is currently the most promising technique to produce carbon nanotubes (CNTs) on a specific site as well as on a large-scale. Here, we review our recent experimental studies on CNTs grown by CCVD. The yield as well as the structural characteristics of CNTs can strongly be aff…
The objective of the present study was to surface modify the titanium thin films to improve its biocompatibility. A layer-by-layer (LBL) self-assembly technique, based on the electrostatic interactions mediated adsorption of chitosan (Chi) and silk fibroin (SF), was used leading to the formation of multilayers on the…
The annealing effects on the microstructure and magnetic properties of Zn0.92Co0.08O films annealed at different temperatures (200, 400 and 600 °C) in air and vacuum have been systematically investigated. The as-grown and annealed films are all highly textured with (002) orientation and all show room temperature ferro…
Most problems are soluble: Reversal of amyloid formation through a controlled induced transformation from β-sheet to soluble α-helix structures through the use of a switch element S (see scheme, σ is a helix-inducing template) could have an important consequences understanding the mechanisms of amyloid formation and c…
Do-it-yourself: Monoschichten von Molekülen und Nanopartikeln sollten auf den Substraten nur durch Selbstorganisation erzeugt werden. Für Monoschichten von Mikropartikeln kommt als Alternative das direkte Aufbringen von Hand hinzu, bei dem sich die Partikel wie Fliesen einpassen (siehe Bild). Die Qualität der händisch…
The optical and electrochemical properties of the ruthenium phthalocyanine complexes [[(t-Bu)4Pc]Ru(4-Rpy)2], where R = NO2, Me, NH2, and NMe2, are reported. The electron density at the macrocycle may be adjusted using the axial ligand substituents, which have varying electron-donating/withdrawing strengths. Electroch…
Shrinking capsules: Using the directionality of DNA hybridization, DNA capsules with controllable shrinkage properties are formed (see picture). The degree of shrinkage ranges from 35–90 % of the original particle volume, depending on the oligonucleotide sequences used to assemble the capsules. These capsules could fi…
Nano-barium titanate (BT) was prepared by a sol–gel method. The prepared powders were characterized by x-ray powder diffraction and transmission electron microscopy. The complex relative dielectric permittivity (ε = ε' − j ε'') and magnetic permeability (μ = μ' − j μ'') of the BT powders were measured in the frequency…
Lead iodide nanoparticles are synthesized in reverse micelle solution of AOT/H 2 O/n-heptane. Optical absorption spectra and TEM analysis indicated the formation of crystalline particles with an average radius of 1.5 nm, which is less than the Bohr radius of the exciton (1.9 nm) in bulk PbI 2 . Using theoretical model…
The origin of the luminescence from ${\mathrm{Ga}}_{2}{\mathrm{O}}_{3}$ microcrystallites and nanostructures has been studied using time-resolved x-ray excited optical luminescence and x-ray absorption near-edge structure spectra in total electron yield and photoluminescence yield. The ${\mathrm{Ga}}_{2}{\mathrm{O}}_{…
An in situ reactive hot‐pressing process using zirconium (zirconium hydride), aluminum, and graphite as staring materials and Si and Y 2 O 3 as additives was used to synthesize bulk Zr 3 Al 3 C 5 ceramics. This method demonstrates the advantages of easy synthesis, lower sintering temperature, high purity and density,…
Abstract Advancements in nanocomposites are highly dependent on the compatibility between the organic matrix and inorganic fillers, and the dispersion level of fillers throughout the matrix. Silane coupling agents are widely used to change the chemical structure of particles' surface in order to improve their compatib…
We have generated an antiserum to the variable domain of mouse collagen XXVII, a recently discovered novel member of the fibrillar collagen family. Collagen XXVII protein was first detectable in the mouse at embryonic day 12.5 (E12.5). By E14.5, the protein localized to cartilage, developing dermis, cornea, the inner…
Abstract Films comprising Au nanoparticles and polyphenylene dendrimers (first and second generation) are deposited onto transducer substrates via layer‐by‐layer self‐assembly and characterized by atomic force microscopy and X‐ray photoelectron spectroscopy. Their sorption behavior is studied by measuring the uptake o…
Current events: Nanowires of the organic semiconductor copper–tetracyanoquinodimethane (Cu–TCNQ) have been synthesized in a controlled manner and patterned on a variety of substrates by chemical vapor deposition. A cross-point memory device based on a network of Cu–TCNQ nanowires (see picture) has been constructed tha…
This communication shows that thermal degradation of poly(3-hydroxybutyrate)s (PHBs) is induced by carboxylate groups via a newly proposed E1cB mechanism. In PHBs with end groups in the form of carboxylic acid salts with Na+, K+, and Bu4N+ counterions, the proposed mechanism explains the dependence of thermal stabilit…