Materials Literature
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Abstract The crystal structures of flux-grown Li 2 (MoO 4 ), LiY(MoO 4 ) 2 and LiNd(MoO 4 ) 2 were solved and refined from single-crystal intensity data collected with a four-circle diffractometer (Mo K α X-radiation, CCD area detector, room temperature). Li 2 (MoO 4 ) is isostructural with phenacite, Be 2 (SiO 4 ) an…
About 20 years ago, a technological innovation process started that eventually led to the affirmation of magnetic resonance imaging (MRI) contrast agents, which are used today in about 25% of all MRI procedures, as medical diagnostic tools. The process began with exploration of various technical possibilities and the…
Abstract High molar mass medium density polyethylene (MDPE) compounds containing magnesium hydroxide filler, surface‐treated by a range of fatty acid coatings of variable aliphatic chain length were injection molded and subjected to mechanical property evaluation. Surface treatment modifies yield stress and modulus, w…
Abstract The use of a tetrafunctional epoxy‐based additive to modify the molecular structure of poly(ethylene terephthalate) (PET) was investigated with the aim of producing PET foams by an extrusion process. The molecular structure analysis and shear and elongation rheological characterization showed that branched PE…
The liquid crystals have been discovered in 1888. Until about 1900 only few mesogenic compounds were known. Daniel Vorländer started his work on liquid crystals about one century ago and he may be called “father of liquid crystal chemistry”. By systematical syntheses of compounds with predetermined geometrical shape h…
The process of stimulated Raman scattering (SRS) allows to convert laser emission wavelengths of materials providing suitable molecular or lattice modes which contribute to the third order nonlinear optical susceptibility. SRS of known materials can produce Stokes or anti-Stokes shifts in the range of about 100 to 310…
Polydomain tetragonal ( t′ ) zirconia was deformed in compression along a 〈100〉 orientation at various temperatures between 500° and 1400°C. The stress‐strain curves showed a plateau corresponding to ferroelastic deformation, followed by plastic deformation at a higher yield stress level. In both ranges, the strain‐ra…
Soil organic constituents may strongly affect the kinetics of soil chemical processes, including K exchange reactions. We investigated the influence of organic matter on the rate of K adsorption by selected soils (Ferric Ultisol, Orthic Ultisol and Vertisol) using a H 2 O 2 treatment and a K ion-selective electrode te…
This article looks at the underlying chemistry of various types of additives, and antimicrobial films, which potentially could be used by the food-packaging industry, and the associated research work which seeks to make this technology commercially usable.
An improved experimental technique for the suppression of the multiphoton fluorescence contribution in hyper-Rayleigh scattering experiments for the determination of the first hyperpolarizability of molecules in solution is presented. This improvement allows for a better correction for the fluorescence artifact, so as…
The effects of finite beams and finite gratings on the performance of guided-mode resonant subwavelength gratings are characterized by using the rigorous boundary element method. The gratings are strongly modulated, have a finite number of periods, and are illuminated by normally incident Gaussian beams. Quantitative…
This review summarizes the recent advances that have been performed on self-assembled inorganic systems, especially on helical systems, metallo-exoreceptors and on architectures formed from multiple components. In addition, applications as well as the perspectives for these designed systems are also discussed.
First examples of post-polymerization functionalization of poly(3,4-ethylenedioxythiophene) (PEDOT) derivatives are reported using tetrathiafulvalene (TTF) as a redox sensitive probe. EDOT derivatives bearing ω-iodo-alkyl or ω-iodo-polyether chains attached at the ethylenedioxy bridge have been electropolymerized and…
We have fabricated refractive sapphire microlenses and characterized their properties for what we believe to be the first time. We use thermally reflown photoresist lenslet patterns as a mask for chlorine-based dry etch of sapphire. Pattern transfer to the mechanically hard and chemically inert sapphire substrate is m…
Abstract Synthesis, structural characteristics, and optical and electrochemical properties of various meso–meso-linked porphyrin arrays were described. The AgI-salt-promoted meso–meso coupling reaction of 5,15-diaryl and 5,10,15-triaryl ZnII-porphyrins is advantageous in light of its high regioselectivity as well as i…
Abstract To find feasibility of identifying nucleotides at the single-molecule level, we implemented Raman imaging and spectroscopy of adenine molecules adsorbed on Ag colloidal nanoparticles. Surface enhanced Raman scattering (SERS) of adenine molecules showed an intermittent on-and-off behavior called “blinking”. Th…
In order to preserve the conditions for an environmentally safe machine, at present the selection of materials for the structural components of fusion reactors is made not only on the basis of adequate mechanical properties, behaviour under irradiation, and compatibility with other materials and cooling media, but als…
Novel 1,3,5-tris(oligothienyl)benzenes have been synthesized by an efficient and very easy trimerization reaction and their optimized three-dimensional geometry has been determined by semiempirical computations. Their electrochemical behavior has been investigated; their electropolymerization with 2,2′-bithiophene led…
Abstract The mechanical performance of natural fiber reinforced polymers is often limited owing to a weak fiber‐matrix interface. In contrast, melamine‐formaldehyde (MF) resins are well known to have a strong adhesion to most cellulose containing materials. In this Paper, nonwoven flax fiber mat reinforced and particu…
Diamond powders of different sizes were compressed at pressures up to 2.5 GPa and heated up to 1700 K. Extent of partial graphitization was estimated from x-ray diffraction and Raman scattering. For example, in the presence of water, at p=2.0 GPa and T=1473 K about 22% of diamond was converted into graphite. The rate…