Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCis-Trans Thermal Isomerization Rates of Bound and Doped Azobenzenes in a Series of PolymersC. Barrett, A. Natansohn, and P. RochonCite this: Chem. Mater. 1995, 7, 5, 899–903Publication Date (Print):May 1, 1995Publication History Published online1 May 2002Published inissue 1…
Franky R. G. Terras, Kristel Eggermont, Valentina Kovaleva, Natasha V. Raikhel, Rupert W. Osborn, Anthea Kester, Sarah B. Rees, Sophie Torrekens, Fred van Leuven, Jozef Vanderleyden, Bruno P. A. Cammue, Willem F. Broekaert, Small Cysteine-Rich Antifungal Proteins from Radish: Their Role in Host Defense, The Plant Cell…
Highly transparent and conductive amorphous zinc-stannate thin films were prepared by rf magnetron sputtering using a target with a Zn/(Zn+Sn) content of 33 at. %. The resistivity distribution of the zinc-stannate films having a composition near ZnSnO3 and deposited on the surface of substrates placed parallel to the…
The spectral line shapes and the absorption frequencies of the oxygen related infrared active vibrational modes in amorphous SiO2 are studied both experimentally and by simulation. Experimental data were obtained on oxides grown thermally in the temperature range from 800 to 1050 °C and on oxides deposited at 300 °C b…
Judd‐Ofelt parameters Ω t with t = 2,4, 6 for the rare‐earth ions Pr 3+ , Nd 3+ , Sm 3+ , Tb 3+ , Dy 3+ , Ho 3+ , Er 3+ , and Tm 3+ in alkali and/or alkaline‐earth silicate, borate, and phosphate glasses have been determined. The variations of Ω t with the number of 4 f electrons of the rare‐earth ions are demonstrate…
The ferroelectric Langmuir-Blodgett films are prepared and investigated for the first time The films are prepared from the ferroelectric copolymer of vinylidene fluoride with trifluorethylene The films with the thickness off 150 Å show the pyroelectric effect being measured along the polar C-axis perpendicular to the…
Cathodic overpotentials of Ln 0.6 Sr 0.4 MnO 3 ( Ln = La , Pr , Nd , Sm , Gd , Yb , and Y ) were studied for a new cathode of solid oxide fuel cell (SOFC). Cathodic overpotentials as well as the electrical conductivity strongly depended on the rare earth cations used for the A sites of perovskite oxide. Strontium dope…
Carbon ions were implanted into crystal silicon wafers at an energy of 50 keV and with a dose of 1017 cm−2 followed by thermal annealing. A layer of polycrystalline β-SiC was formed beneath the sample surface. Porous nanometer structures were prepared by conventional anodization. At room temperature, the samples exhib…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConducting Polyaniline Nanoparticle Blends with Extremely Low Percolation ThresholdsPallab Banerjee and Broja M. MandalCite this: Macromolecules 1995, 28, 11, 3940–3943Publication Date (Print):May 1, 1995Publication History Published online1 May 2002Published inissue 1 May 1…
Polymers which are attached to a fluid membrane by a single anchor exhibit a dilute mushroom regime and a semi-dilute brush regime. Scaling arguments and explicit calculations for ideal polymers show that the membrane is bent by the anchored polymer: For smooth bends, an anchored mushroom with linear size R po induces…
We consider the diffraction of a time-harmonic wave incident upon a grating (or periodic) structure. We study mathematical issues that arise in the direct modeling, inverse, and optimal design problems. Particular attention is paid to the variational approach and to finite-element methods. For the direct problem vario…
A new modeling system to determine the optical response function of a multilayer structure with imposed periodicity in the plane of the layers, a multilayer diffraction grating, is described. This new model has two essential ingredients. This model is based on the well-established coordinate transformation procedure d…
The upconversion mechanism of Er3+ ions has been studied for lead-germanate glasses containing Er2O3 concentrations from 0.1 mol % to 2 mol %. Intense green emission was observed at room temperature due to 4S3/2→4I15/2 transition excited by a cw near-infrared laser beam at 797 nm. This green emission shows a similar i…
In Part 1 of this work, we formulated and analyzed a mathematical model for our fibroblast-populated collagen microsphere (FPCM) assay of cell traction forces (Moon and Tranquillo, 1993). In this assay, the FPCM diameter decreases with time as the cells compact the gel by exerting traction on collagen fibrils. In Part…
Abstract Nylon 6‐clay hybrid (NCH) is a molecular composite of Nylon 6 and uniformly dispersed silicate monolayers of montmorillonite. In this study the preferred orientation of montmorillonite and Nylon‐6 crystallites in a thick (3 mm) injection‐molded bar of NCH has been investigated using x‐ray diffraction and elec…
Nickel oxide electrochromic thin films were prepared by reactive DC magnetron sputtering. The as-deposited optical property and electrochromic behavior strongly depended on the target operation mode and the substrate temperature. The sample sputtered with low oxygen flow rate, high power and substrate temperature of 2…
We have performed spin- and orbital-unrestricted Hartree-Fock calculations on a realistic perovskite-type lattice model using electronic-structure parameters deduced from photoemission spectroscopy. For high-spin ${\mathit{d}}^{4}$ ${\mathrm{LaMnO}}_{3}$, alternating (3${\mathit{x}}^{2}$-${\mathit{r}}^{2}$)/(3${\mathi…
Many proteins, including proteases and growth factors, are synthesized as precursors in the form of pre-pro-proteins. Whereas the pre-sequences usually act as signal peptides for transport, the pro-sequences of an increasing number of these proteins have been found to be essential for the correct folding of their asso…
We present a detailed experimental and numerical investigation of the directional-solidification growth patterns in thin films of the ${\mathrm{CBr}}_{4}$--8 mol % ${\mathrm{C}}_{2}$${\mathrm{Cl}}_{6}$ alloy, as a function of the orientation of the (fcc) crystal with respect to the solidification setup. Most experimen…
Variations in the nonreactive P content of lake sediments as a consequence of changing redox conditions suggest that microorganisms may contribute to uptake and release of P. In this study, 31–50% of the nonreactive P was identified as polyphosphate (poly‐P) in NaOH extracts of sediments from eutrophic Lake Baldegg an…