Materials Literature
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Vanadium dioxide (VO<sub>2</sub>) is a strongly-correlated electron material with a well-known semiconducting to metallic phase transition that can be induced thermally, optically, or electrically. When switched to the high-temperature (T > 68°C) metallic phase, the greatest contrast in the optical properties o…
A new class of high power high brightness 808 nm QCW laser diode mini bars has been developed. With nLight's nXLT facet passivation technology and improvements in epitaxial structure, mini bars of 3 mm bar width with high efficiency design have tested to over 280 W peak power with peak efficiency over 64% on conductio…
Optical and photostability measurements have been made on nonlinear optical films containing amorphous polycarbonate and an organic chromophore that has a high 2nd order nonlinear optical figure of merit. We show that the decrease in the photodegradation quantum efficiency with increasing optical intensity can be mode…
Fatigue behavior of case hardened parts depend to a great extent on the type of residual stresses developed in the components. Topography and metallurgical effects were the two elements which contribute much to surface integrity. Micro hardness of the gas carburized (EN 33 and EN 36) and Induction hardened (AISI 1040…
In this work, we theoretically and experimentally demonstrate a highly sensitive polymer-cladded porous silicon (PSi) membrane waveguide based on a ~1.55 μm thick porous silicon membrane coated on one side with a low loss polymer. The sensor operates in the Kretschmann configuration, which is amenable to microflu…
Multicolor visible light emitting NIR-excited Tm/Ho/Yb-codoped tantalum oxide nanopowders were produced using the sol-gel method. The generation of wide color gamut fluorescence in glass-ceramic with orthorhombic Ta<sub>2</sub>O<sub>5</sub> nanocrystals dispersed into amorphous silica-based matrix is observed. The lig…
A self-limited monolayer grown on dolomite (CaMg(CO(3))(2)), showing distinct friction contrast with the substrate as reported earlier using lateral force microscopy, was investigated with in situ atomic force microscopy (AFM) adhesion mapping and force-modulation techniques. Force-modulation microscopy revealed lower…
ZnSe quantum dots are wide-band gap materials suitable for UV-blue-emitting applications like laser diode or biolabeling probes. Initially, an organometallic approach have been proposed for preparing these quantum dots with high quantum yield (QY), crystallinity and monodispersity. Although, the chemicals used in this…
This paper reports the high-accuracy Sellmeier and thermo-optic dispersion formulas for β-BaB<sub>2</sub>O<sub>4</sub> (β-BBO) that provide the excellent reproduction of our data for second-harmonic generation (SHG) and sum-frequency generation (SFG) down to 0.2048 and 0.1925μm as well as the optical para…
Abstract Oxorhenium(V) complexes [ReO X 3 (PPh 3 ) 2 ] ( X = Cl, Br) react with phenylacetylene under formation of complexes with ylide‐type ligands. Compounds of the compositions [ReOCl 3 (PPh 3 ){C(Ph)C(H)(PPh 3 )}] ( 1 ), [ReOBr 3 (OPPh 3 ){C(Ph)C(H)(PPh 3 )}] ( 2 ), and [ReOBr 3 (OPPh 3 ){C(H)C(Ph)(PPh 3 )}] ( 3 )…
Cylindrical elastomers were prepared through the UV-initiated crosslinking of terminally acrylated, 8,000 Da star-poly(trimethylene carbonate-co-ε-caprolactone) and star-poly(trimethylene carbonate-co-D,L-lactide). These elastomers were implanted intramuscularly into the hind legs of male Wistar rats to determine the…
The small-angle X-ray scattering data of expanded fluid mercury published in the literature were evaluated using a modified form of the Teubner–Strey equation for microemulsions together with the general treatment of two-phase systems according to Porod. The parameters obtained in the critical region and the metal–non…
Abstract The following article from Microwave and Optical Technology Letters, Volume 52, Issue 4, "Design, simulation, and measurement of metamaterial absorber" by Yongzhi Cheng and Helin Yang, published online on February 11, 2010 in Wiley InterScience ( www.interscience.wiley.com ), has been retracted by the journal…
The equations of thermoelasticity are first rewritten in Hamiltonian form where the variables are separable in spatial coordinates. The symplectic eigensolutions satisfying the boundary conditions along the crack faces are solved analytically from the homogeneous equations. The loading and the particular integral are…
In this paper we report on the gravity-driven transport of rigid spheres of various sizes through the fluid–fluid interface of a demixed colloid–polymer mixture. Three consecutive stages can be distinguished: (i) the sphere approaches the interface by sedimenting through the polymer-rich phase, (ii) it is subsequently…
In the last years, several numerical methods have been studied and applied to the analysis of high index contrast bent waveguides. Very often, the problem is treated using a conformal mapping, which translates the bending into an equivalent graded index profile and a straight waveguide. In this article, we discuss the…
Leather is a natural material with many applications: automotive, domestic upholstery, buildings, aviation, maritime, personal safety, etc. For each of these sectors, fire behavior is a field of particular interest. Unfortunately, there are many testing methods and different flammability standards depending on materia…
We present design, fabrication, and characterization results of a highly absorptive surface in the thermal infrared that draws on concepts from the frequency selective surface and metamaterials communities. At normal incidence this optically thin surface has an absorption of over 99%. Furthermore, it has a broad angul…
Single crystals of monoclinic Nd:LaVO 4 with dimensions up to Ø28 × 21 mm have been grown from the near-stoichiometric melt by the Czochralski method, making use of various seed orientations that are perpendicular to the (010), (10{\overline 1}), (001) and (00{\overline 1}) crystal planes. A sample was also prepared w…
Abstract Polyaniline (PANI) latexes were synthesized by emulsion polymerization using dodecyl benzene sulfonic acid (DBSA) and sodium dodecyl sulfate (SDS) as a surfactant. Synthesized PANI–DBSA and PANI–SDS latexes were characterized by IR and UV‐visible spectroscopies, and surface morphology was analyzed by transmis…