Materials Literature
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We present results from high-resolution electron energy loss spectroscopy (HREELS) and XPS studies of self-assembled monolayers of DNA. The monolayers are well-organized and display sharp vibrational peaks in the HREEL spectra. The electrons interact mainly with the backbone of the DNA. The XPS results indicate that,…
Models for the prediction of corrosion often give the misleading impression that corrosion of steel in seawater environments is a linear function of time (the “corrosion rate”). More recently non-linear functions for corrosion loss have been proposed calibrated to aggregated data from a wide variety of sources. Unfort…
Abstract In this study, an easy and efficient synthesis of unsaturated plant oil triglycerides having isocyanate groups is reported. In the first step of the synthesis, the triglyceride was brominated at the allylic positions by a reaction with N ‐bromosuccinimide, and in the second step, these brominated species were…
In this paper, parameters of the Jiles–Atherton (J-A) hysteresis model are identified using a stochastic search algorithm called differential evolution (DE). The J-A hysteresis model's parameters are identified by DE in such a way, that best possible agreement is obtained between the measured and model calculated hyst…
Endocytic receptor trafficking is a complex, dynamic process underlying fundamental cell function. An integrated understanding of endocytosis at the level of single or small numbers of ligand bound-receptor complexes inside live cells is currently hampered by technical limitations. Here, we develop and test ligand ner…
AIMS: A new strain of Bacillus, Bacillus cereus SPV, was found to be capable of using a wide range of carbon sources for the production of polyhydroxyalkanoates (PHAs) (Valappil et al. 2007b). Limiting nutrient in the culture conditions is crucial for PHA production. In this study, B. cereus SPV was grown in different…
Abstract The influence of molecular weight, M , on the fragility and fast dynamics in polyisobutylene (PIB) was studied using dielectric and mechanical relaxation spectroscopies, calorimetry, and Raman spectroscopy. The measurements indicate a decrease in fragility with increasing M for shorter chains, in the range of…
Here we report the fabrication and superconductivity of the iron-based arsenic oxide GdFeAsO 1−δ compound with oxygen-deficiency, which has an onset resistivity transition temperature at 53.5 K. This material has the same crystal structure as the newly discovered high- T c ReFeAsO 1−δ family (Re = rare earth metal) an…
Here we present a facile one-pot method to prepare high-quality CdTe nanocrystals in aqueous phase. In contrast to the use of oxygen-sensitive NaHTe or H(2)Te as Te source in the current synthetic methods, we employ more stable sodium tellurite as the Te source for preparing highly luminescent CdTe nanocrystals in aqu…
An ion-radical salt, ${(\text{ESBN})}_{2}{\text{ClO}}_{4}$, obtained from the electrochemical crystallization of an organic donor radical, ESBN, exhibited giant negative magnetoresistance ($\ensuremath{-}70%$ at 2 K in 9 T) in spite of the absence of metal ions. Furthermore, it was found that the conductivity of ${(\t…
High-spin molecules have been proposed as candidates for the storage of information at the molecular level. The electronic structure of two complex magnetic molecular systems, Mn 10 and Mn 19, is characterized by means of a computational study based on density functional theory. All the exchange interactions in the re…
This paper presents the use of the multiobjective particle swarm optimization (PSO) technique for the identification of Jiles-Atherton model parameters. This approach, implemented for the first time in order to solve this kind of problem, is tested for two magnetic materials: NO 3% SiFe and NiFe 20-80. The results are…
Porous titania networks containing gold nanoparticles have been synthesized and tested in photocatalytic applications. The porous structure was controlled using a templating technique, while a range of gold concentrations and a variety of routes were investigated to incorporate the gold nanoparticles. The influence of…
Abstract New method of synthesis of water‐soluble polymer‐drug conjugates, exhibiting remarkable anticancer activity in mice models, has been developed. In the conjugates, an anticancer drug doxorubicin (DOX) is attached to a polymer carrier based on N ‐(2‐hydroxypropyl)methacrylamide (HPMA) copolymer via a hydrolytic…
We present a fast and efficient tight-binding (TB) method for simulating scanning tunneling microscopy (STM) imaging of adsorbate molecules on ultrathin insulating films. Due to the electronic decoupling of the molecule from the metal surface caused by the presence of the insulating overlayer, the STM images of the fr…
We report for the first time on the controlled hydrothermal synthesis of barium titanate nanostructures using Na 2 Ti 3 O 7 nanotubes and nanowires as synthetic precursors. A variety of nanostructured BaTiO 3 have been prepared, exhibiting either simple shapes of nanowires, nanosheets, nanocubes, and hexagonal nanopar…
Angle-resolved photoemission spectra of a monolayer of Yb on W(110) reveal energy splittings and dispersion of the Yb 4f states that are obviously due to their hybridization with W-derived valence bands. These effects occur at well defined points of the surface Brillouin zone although a smearing over reciprocal space…
The commensurate phase of multiferroic ${\text{HoMn}}_{2}{\text{O}}_{5}$ was studied by x-ray magnetic scattering, both off-resonance and in resonant conditions at the $\text{Ho}\text{ }{L}_{3}$ edge. Below 40 K, magnetic ordering at the Ho sites is induced by the main Mn magnetic order parameter, and its temperature…
This paper describes the preparation of superhydrophobic surfaces that have been selectively patterned with circular hydrophilic domains. These materials mimicked the back of the stenocara beetle and collected drops of water if exposed to mist or fog. Under the effect of gravity, the drops dewetted from the hydrophili…
A facile synthesis route for preparing SBA-15 silica of platelet shape and very short mesochannels (150−350 nm) was developed by introducing a small amount of Zr(IV) ions in the synthesis solution. The synthesis route can be easily extended to prepare platelet SBA-15 materials with various organic functional groups up…