Materials Literature
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The ground state properties of three compounds, Cr 7 C 3 , Fe 3 C and Fe 2 B, are investigated using ab initio calculations based on density functional theory. Formation enthalpy values indicate that Cr 7 C 3 is the most stable crystal among the three compounds. Fe 3 C is metastable which has a positive heat of format…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTA Versatile Grafting-to Approach for the Bioconjugation of Polymers to Collagen-like Peptides Using an Activated Ester Chain Transfer AgentKerstin T. Wiss†, Ohm D. Krishna‡, Peter J. Roth†, Kristi L. Kiick*‡, and Patrick Theato*†Vie…
An important aspect of synthesizing designer nanostructures is fine-tuning their size, composition, and surface area. These parameters often dictate the unique properties of nanoparticles relative to their bulk counterpart. This paper reports the synthesis of porous metal nanorods with well-controlled dimensions, poro…
A series of thermo- and pH-dual responsive dendronized polymers PSADG1 − PSADG3 were successfully synthesized by attaching butylamide terminated poly(amidoamine) dendrons ( DG1 − DG3 ) to the alternating copolymers of styrene (St) and maleic anhydride (MAh). The structures and the molecular weights of the obtained pol…
Inelastic neutron, light, and x-ray scattering are used to investigate the vibrational density of states (VDOS) and the elastic properties of a sodium silicate glass as a function of temperature. The elastic moduli show the frequency and temperature dependence typical of anharmonic effects. The measured VDOS spectra,…
Microscopic chemical patterning of diamond surfaces by hydrogen and oxygen surface atoms is used for self-assembly of human osteoblastic cells into micro-arrays. The cell adhesion and assembly is further controlled by concentration of cells (2,500-10,000 cells/cm(2)) and fetal bovine serum (0-15%). The cells are chara…
Multi-platform software has been developed for the analysis of powder diffraction data, with particular focus on structure solution. The program provides a Rietveld optimization engine, with the possibility of refining parameters describing both the sample and the instrument model. Geometric constraints such as rigid…
By means of classical molecular-dynamics simulations, we investigate solid-solid phase transitions in cylindrical iron nanowires. The interatomic potential employed has been shown to be capable of describing the martensite-austenite phase transition in iron. We investigate the dependence of the transition temperature…
The understanding of biomineralization and realization of biology-inspired materials technologies depends on understanding the nature of the chemical and physical interactions between proteins and biominerals or synthetically made inorganic materials. Recently, combinatorial genetic techniques permit the isolation of…
In recent years, interest has grown in natural fibers as promising materials for a number of applications, particularly in polymer composite materials because they offer a number of advantages such as nontoxicity, eco-friendliness, combustibility, light weight, and low cost. Surface modification of Grewia optiva fiber…
Structural properties of the ${\text{AgSbTe}}_{2}{\text{-AgSbSe}}_{2}$ pseudobinary system were examined using thermal analysis, scanning electron microscopy, and x-ray powder diffractometry. It was found that partial substitution of Te by Se atoms leads to stabilization of the cubic crystal structure of alloys. The e…
The perspective of generating new colors commonly difficult to attain such as cyan blue and greens of various tones and saturations has motivated the design of conjugated polymer finely tuned in their molecular structure to reassemble the optical features desired in the context of non-emissive electrochromic device (E…
We investigate the assembly of colloidal ellipsoids in ac electric fields. Polystyrene latex ellipsoids with aspect ratios 3.0, 4.3, and 7.6 orient with the applied field and, at sufficient field strengths, interact to form particle chains at an angle with respect to the field. The characteristic chain angle decreases…
The use of a heterogeneous catalyst in the transesterification reaction of sunflower oil and waste oil for the production of methyl esters (biodiesel) has been studied. The basic hydrotalcite catalyst used showed a high activity for transesterification reactions in the operation conditions studied. The experiments wer…
A series of blends of poly(lactic acid) (PLA) and poly(ε-caprolactone) (PCL) with different mass ratio were prepared by means of the melt blending method to study their crystallization, miscibility, morphology, and thermal and mechanical properties. The result of DSC tests showed that the melting temperatures of PLA a…
Abstract The present work reports a simple approach for fabrication of self‐standing titania (TiO2) nanotube membranes with through‐hole morphology. The method is hydrofluoric acid free and the pore opening of TiO2nanotubes is performed by electrochemical thinning of the oxide barrier layer. A reduction of anodization…
Abstract Sonication‐induced gelation: Adaptive gels that are responsive to ultrasound were prepared and characterized. The self‐assembly of the gelators can be controlled by ultrasound (S‐gel) stimuli and renewed by a thermodynamic process (T‐gel, see images). magnified image A family of asymmetric cholesterol‐based f…
We report an approach to the design of reactive polymer films that can be functionalized post-fabrication to either prevent or promote the attachment and growth of cells. Our approach is based on the reactive layer-by-layer assembly of covalently crosslinked thin films using a synthetic polyamine and a polymer contain…
In this paper, we report a facile route which is based on tuning doping concentration of Mn(2+) ions in ZnS nanocrystals, to achieve deliberate color modulation from blue to orange-yellow under single-wavelength excitation. X-ray diffraction (XRD), transmission electron microscopy (TEM), as well as photoluminescence (…
Seventy-three billion chicken eggs are produced annually in the United States. However, less than 0.1% of these eggs are exported. Increasing the shelf-life of eggs may increase export sales. The goal of this research was to determine whether food-grade coatings on eggs may extend shelf-life under refrigerated storage…