Materials Literature
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In this work we analyze the relation between the multiplicative decomposition F = F e F p of the deformation gradient as a product of the elastic and plastic factors and the theory of uniform materials. We prove that postulating such a decomposition is equivalent to having a uniform material model with two configurati…
New, halogen-bonded mesogens are formed as trimeric complexes of two molecules of alkoxystilbazole and one of 1,4-diiodotetrafluorobenzene. The pure complexes show only monotropic nematic phases, while mixtures show a enantiotropic nematic with a range of up to 11 °C. A possible correlation between nematic phase stabi…
Rotating polar linker groups in the cubic metal-organic framework single crystal known as IRMOF-2 were investigated for freedom of motion, response to an external electric field, and effects of dipole-dipole interactions. The crystals consist of octahedrally coordinated zinc oxide clusters linked by the bromoterephtha…
Silver coordination polymer chains were deposited on Au(111) as a model surface, as well as on gold alloy and titanium as dental implant and restorative materials. The topography of the surface was analysed on the model substrate and it was found to be a nano-structured crystalline material. In vitro investigations in…
Single-phase -doped red phosphor was obtained by nitridation of alloy powder under the high pressure of in a hot isostatic pressing apparatus at . The unit cell volumes of the single phase expanded linearly with the increase in value of from 0.2 to 0.8. A blueshift of the red emission peak of from 650 to was observed…
Heart valve replacements composed of living tissue that can adapt, repair, and grow with a patient would provide a more clinically beneficial option than current inert replacements. Bioartificial valves were produced by entrapping human dermal fibroblasts within a fibrin gel. Using a mold design that presents appropri…
The triple helix is a specialized protein motif found in all collagens. Although X-ray diffraction studies of collagen began in the 1920s, the very small amount of data available from fiber diffraction of native collagen caused the determination of its molecular conformation to take a very long time. In the early 1950…
Nanocomposite microcapsules with both gold and magnetite nanoparticles in the shell were prepared in a layer-by-layer procedure using biocompatible polyelectrolytes and nanoparticles. The process of a nanocomposite multilayer formation was investigated using a quartz crystal microbalance (QCM). In addition, nanocompos…
Raman optical activity (ROA) directly monitors the stereochemistry of chiral molecules and is now an incisive probe of biomolecular structure. ROA spectra contain a wealth of information on tertiary folding, secondary structure and even the orientation of individual residues in proteins and nucleic acids. Extension of…
Stable gold nanoparticles with average size 1.7 nm synthesized by an amine-terminated ionic liquid showed enhanced electrocatalytic activity and high stability.
A silicon hierarchical structure, silicon nanoporous pillar array (Si-NPA), was prepared by a hydrothermal etching method. The architecture of Si-NPA was characterized to be a regular array of micron-sized, quasi-identical and nanoporous silicon pillars with an additional porous layer beneath the array. The pore walls…
Thermally induced shape-memory effect (SME) in tensile mode was investigated in binary and ternary blends of two ethylene-1-octene copolymers with a degree of branching of 30 and 60 CH3/1000C and/or nearly linear polyethylene cross-linked after melt mixing with 2 wt% of liquid peroxide 2,5-dimethyl-2,5-di-(tert.butylp…
Lithium tetrahydridoboranate (LiBH 4 ) may be a potentially interesting material for hydrogen storage, but in order to absorb and desorb hydrogen routinely and reversibly, the kinetics and thermodynamics need to be improved significantly. A priori, this material has one of the highest theoretical gravimetric hydrogen…
The coinage metals, copper, silver, and gold, have unique characteristics for selective oxidation catalysis, particularly for partial oxidation of alcohols and olefins. A basic understanding of surface chemistry at the molecular level can help facilitate the improvement of current catalytic processes and the designing…
Production of NiO by chemical precipitation is the approach utilized in this work. Materials mainly used in this project are nickel nitrate hex hydrate (as a basic material), sodium hydroxide (as a precipitator material), and the following surfactants (for reduction in particle size). Applied surfactants are in two ki…
X-ray biocrystallography is the most powerful method to obtain a macromolecular structure. The improvement of computational technologies in recent years and the development of new and powerful computer programs together with the enormous increment in the number of protein structures deposited in the Protein Data Bank,…
Ytterbium fluoride compounds with different crystal phases and morphologies, such as β-NaYbF4 hexagonal microdisks, microprisms, microtubes, and α-NaYbF4 submicrospheres as well as YbF3 octahedra, have been synthesized via a facile hydrothermal route. X-Ray diffraction (XRD), scanning electron microscopy (SEM), transm…
BODIPY dyes were synthesized from pyrrole-2-carbaldehyde derivatives in high yields; this constitutes a new approach to this dye framework.
Metastable orthorhombic phase of AgInS2 nanocrystals with various shapes, including particles, rods, and worms, have been obtained to demonstrate a facile and effective one-pot chemical route for the synthesis of high quality I-III-VI2 ternary semiconductor nanocrystals (AgInS2, CuInS2, AgInSe2) with controllable shap…
Wetting transitions were studied with vertically-vibrated drops on various artificial and natural rough substrates. Alternative pathways of wetting transitions were observed. The model of wetting transition is presented. Multiple minima of the Gibbs free energy of a drop deposited on a rough surface explain alternativ…