Materials Literature
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Conductors with infrared plasma frequencies are potentially useful hosts of surface electromagnetic waves with sub-wavelength mode confinement for sensing applications. Such materials include semimetals, semiconductors, and conducting polymers. In this paper we present experimental and theoretical investigations of su…
Abstract One of the problems for modern photolithography is a resolution increase of images recorded on photoresists. For this goal a method of photochromic masking using reversible photochemical transformations of organic systems may be developed. More than 150 photochromic compounds from 11 classes have been studied…
We propose a general description of electrically induced resonances (EIR) in metamaterials (MMs) comprising subwavelength unit cells. Based on classical electrodynamics, we found that EIR is governed by an equal-potential effect. Our theory accounts for the EIR phenomena and can give a renewed definition of the effect…
Methanol steam reforming (MSR) is an important means to produce hydrogen. While metal Pd shows no selectivity to MSR, PdZn alloy exhibits both high selectivity and activity towards this process. Recently a high temperature desorption peak of formaldehyde is observed when methanol is dosed onto Pd(111) surfaces on whic…
Nuclear Quadrupole Resonance (NQR) is a spectroscopic technique closely related to Nuclear Magnetic Resonance (NMR) and Magnetic Resonance Imaging (MRI). These techniques, and NQR in particular, induce signals from the material being interrogated that are very specific to the chemical and physical structure of the mat…
Aggregates of misfolded proteins play an important role in diseases such as Alzheimer's. Here it is demonstrated how the anionic oligothiophene p-FTAA interacts with and influences pre-fibrillar protein assemblies during the earlier stages of in vitro fibrillation. Conjugated polythiophenes have previously been demons…
Three forms of nano-trititanate (H(2)Ti(3)O(7) nanomaterial) were prepared by a hydrothermal method to replace nano-TiO(2) for sterilizing the environment. The bactericidal capabilities of these nano-trititanates were observed to be more significant compared to nano-TiO(2) both with and without exposure to UV light. F…
Abstract A type of bistriethoxysilane endcapped polyurethane/ureas (SPU) with well‐defined structure was synthesized from bis(triethoxysiylpropyl) amine and purified prepolymers, which were obtained from the reaction of 2,4‐toluene diisocyanate (TDI) and polyoxyethylene glycol (PEG) with different molecular weight. Th…
Abstract The purpose of this study was to investigate the effect of nitrate ions (NO3−) on the critical pitting temperature (CPT) of Co1.5CrFeNi1.5Ti0.5Mo0.1 in chloride solutions using the potentiodynamic polarization method. Results indicate that the values of CPT for the alloy in 1 (mol/L) M sodium chloride (NaCl),…
Rare-earth-doped magnetic-optic bifunctional alkaline-earth metal fluoride nanocrystals have been successfully synthesized via a facile microwave-assisted process. The as-prepared nanocrystals were monodisperse and could form stable colloidal solutions in polar solvents, such as water and ethanol. They show bright-gre…
In this paper a novel on-line tritium monitor is presented. It is made with a single crystal diamond detector (SCD) covered with a thin layer of LiF 95% enriched in6Li. Thermal neutrons impinging on the LiF layer produce α and T ions which are detected by the active diamond. The pulse height spectrum shows two separat…
Abstract Acoustic emission (AE) was used for monitoring steel cracking during exposure to wet hydrogen sulfide (H2S) environments. A method for filtering AE data related to hydrogen-induced cracking (HIC) was presented and applied for several case studies. In a series of tests on unstressed sweet service steels, evolu…
Anti-reflecting (AR) surface relief microstructures (ARMs) are being developed as a replacement for thin-film AR coatings in laser-based systems to improve light transmission, power handling, operational bandwidth, and system reliability. Because ARMs textures have the potential to be replicated using simple embossing…
The structural and electronic properties of epitaxial and amorphous Fe${}_{x}$Si${}_{1\ensuremath{-}x}$ alloys with $x$ $=$ 0.72 and 0.67 near the binary Heusler composition of $x$ $=$ 0.75 were determined using hard x-ray photoelectron spectroscopy (HXPS). By performing the measurements at a photon energy of 5950.3 e…
We demonstrate a reversible phase transition in nanoparticles composed of a binary eutectic alloy, Ge–Au. The structure, 9 nm diameter nanoparticles embedded in silica, can be switched from bilobe to mixed using a 30 ns ultraviolet laser pulse. The structure can be switched back to bilobe by heating at 80 °C. The bilo…
Low-temperature reflow anneals of physical-vapor-deposited (PVD) Cu on Ru are achieved at a Cu/low-kintegration-compatible low temperature of 250°C by surface diffusion. Feature-fill capability is also demonstrated in patterned features along with reasonable electrical measurements. As compared to typical impurity lev…
Composites of polypropylene and oil palm empty fruit bunch (OPEFB) were prepared by melt blending using ENGAGE TM 7467 (polyolefin elastomer) as an impact modifier. ENGAGE TM 7467 is a polyolefin elastomer. The mechanical properties and morphology of composites have been studied. Tensile tests showed that addition of…
We have investigated the structural and magnetic properties of antiferroelectric ${A}_{2}$CoTeO${}_{6}$ perovskites with $A=\mathrm{Cd}$, Ca, Sr, Pb, and Ba. All compounds are antiferromagnetic at low temperatures, with the antiferromagnetic transition temperature slightly decreasing with decreasing ionic size of the…
The soluble polyimide (PI)–silver nanocomposite (PISN) 6a containing chalcone moieties as a photosensitive group was synthesized successfully by a convenient ultraviolet irradiation technique. A precursor such as AgNO 3 was used as the source of the silver particles. PI 6 was synthesized by the one-step synthesis of P…
The magnetic phase diagram of multiferroic MnWO(4) is studied in magnetic fields up to 60 T using sound velocity and sound attenuation measurements. Anomalies are observed at temperatures T(N1) = 7.6 K, T(N2) = 12.6 K and T(N3) = 13.6 K that separate commensurate antiferromagnetic (AF1) to helical AF2 and commensurate…