Materials Literature
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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…
We have designed and implemented an electrostatic lens that magnifies the images of an existing velocity map imaging apparatus up to a factor of 20. The lens can be used to vary the magnification while keeping the field strength in the interaction region constant. For the region of interest where magnification is requ…
Abstract The kinetics of the hydration of magnesia to produce magnesium hydroxide is described by a kinetic model with no diffusive contribution, including an additional resistance to the reactive flux due to the transient variation of the porosity of the material during reaction. The proposed model has been applied t…
Cellosyl is a bacterial muramidase from Streptomyces coelicolor. Similar to other lysozymes, the enzyme cleaves the beta-1,4-glycosidic bond between N-acetylmuramic acid and N-acetylglucosamine units, but it also exhibits a beta-1,4-N,6-O-diacetylmuramidase activity. The latter enables Cellosyl to degrade the cell wal…
Catalytic effects were investigated on the direct nitridation of silicon granules, impregnated with 0.125–2.0% by mass of calcium, yttrium, iron, copper, silver, chromium, or tungsten, in a stream of nitrogen with 10% hydrogen, using a tubular flow reactor operated at temperatures ranging from 1200° to 1390°C. Calcium…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTStructure of Poly(ferrocenyldimethylsilane) in Electrospun NanofibersZhihao Chen, Mark D. Foster, Wensheng Zhou, Hao Fong, Darrell H. Reneker, Rui Resendes, and Ian MannersView Author Information Department of Polymer Science, The U…