Materials Literature
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A side-chain liquid crystalline polyurethane (LCPU) based on NCO- terminated polybutadiene and bi-phenol has been synthesized. The characterization of LCPU samples was done using gel permeation chromatography, scanning electron microscopy, differential scanning calorimetry, thermogravimetry, and polarized optical micr…
Abstract A simple‐cubic lattice of identical, magnetodielectric spheres exhibiting double‐negative (DNG) behavior is analyzed.An analytic expression for the threshold loss angle δth of the spheres, above which DNG behavior is extinguished, is derived by utilizing the Möbius transformation. The formula is valid for eit…
Abstract Most of the recent research on electromagnetic absorbers at terahertz (THz) frequencies is focused on metamaterials based absorber, which provides high absorptivity of electromagnetic (em) radiations in narrow frequency band and tailoring of em response of materials. Under this work, we have also attempted th…
Rheological responses of hydrophobic fumed silica powders, whose surface silanol groups were modified by hexadecane, suspended in 1,4-dioxane at lower silica concentrations than 6.8 vol% have been investigated as a function of the silica concentration. Transient shear stress behavior before attaining the steady-state…
Cathodic current trends on stainless steel samples with different surface percentages covered by biofilm and potentiostatically polarized in natural seawater were studied under oxygen concentration changes, temperature increases, and additions of enzymic inhibitors to the solution. The results showed that on each surf…
This report describes an investigation into the generation of fiber length distributional function using a limited number of length measurements. Based on the experimental data, the correlation between fiber length statistics (the calculated mean value and variance) and length measures (tested short fiber content, spa…
We report on a $c$-axis polarized optical measurement on a Ba${}_{0.67}$K${}_{0.33}$Fe${}_{2}$As${}_{2}$ single crystal. We find that the $c$-axis optical response is significantly different from that of high-${T}_{c}$ cuprates. The experiments reveal an anisotropic three-dimensional (3D) optical response with the abs…
A special cavity based on effective near-zero-index paired structures containing ɛ-negative and μ-negative materials is realized by using composite right- or left-handed transmission lines. When an artificial magnetic "atom" is put into the cavity, unusual Rabi-type splitting appears because of the strong coupling bet…
Nonlinear optical imaging is a powerful method for observing bulk and interfacial phenomena in time and space. Here, we present a step-by-step description of how to carry out second harmonic generation imaging with a kHz amplifier laser system and demonstrate its applicability for SHG microscopy studies of highly size…
Two high molecular weight (MW) isotactic polypropylene (i-PP) samples, one containing a small amount of rr stereodefects denoted R1 and one conventional, commercial i-PP denoted S1, were used to grow single crystals in thin films at high temperatures ( T x = 145 °C for R1, T x = 155 °C for S1). Elongated α 2 -form lat…
The thermo-mechanical and tensile properties of multiwalled carbon nanotube (MWCNT)/epoxy composite samples were evaluated by performing dynamic-mechanical thermal analysis (DMTA) and tensile tests. The composite samples were fabricated by sonication and a cast molding process. The results indicated that the addition…
Crystalline nanosized particles of clathrate-II phases K(x)Ge(136) and Na(x)Si(136) were obtained from a dispersion of alkali metal tetrelides in ionic liquids based on DTAC/AlCl(3), which were slowly heated to 120-180 °C. The nanoparticles are bullet-shaped with typical dimensions of about 40 nm in width and 140-200…
We performed visualization of the oxygen diffusion path in oxidized and reduced BaTiO 3 ceramics by utilizing an ion-imaging technique. The oxygen tracer diffused quickly from the surface up to the grain boundary, and then behaved as discontinuous steps at the grain boundary. The grain boundary acted as a blocking lay…
We present a new phase-field model for binary fluids, exhibiting typical signatures of soft-glassy behavior, such as long-time relaxation, aging, and long-term dynamical arrest. The present model allows the cost of building an interface to vanish locally within the interface, while preserving positivity of the overall…
Microbial diversity in corrosion samples from energy transmission towers was investigated using molecular methods. Ribosomal DNA fragments were used to assemble gene libraries. Sequence analysis indicated 10 bacterial genera within the phyla Proteobacteria, Firmicutes, Actinobacteria and Bacteroidetes. In the two libr…
In the present study, cellulose carbon encapsulated zinc oxide (CCZnO) was synthesized by the charring of cellulose acetate onto ZnO particles. CCZnO was characterized by SEM, FTIR, XRD, TGA, and DTA. The adsorption feature of CCZnO was studied for the removal of toxic amaranth dye and 99% adsorption of amaranth was o…
Designs of optical lenses based on metallic nanoslits are carried out based on the phase and amplitude modulation by tuning the slit widths. The slits are perforated on thin metallic film, and the width of each slit is achieved by simulated annealing algorithms, which is connected with both the amplitude and phase mod…
Introduction of a critical amount of different alkali halides in an otherwise identical aqueous synthesis condition was found to produce different morphologies of indium hydroxide from an In metal source. In this study, synthesis in KCl medium leads to polycrystalline bundled rodlike morphology whereas KI medium leads…
Petroleum contamination is a widespread and well-recognized global environmental threat to human health and ecosystems. Haloarcula sp. IRU1 was cultivated axenically in synthetic liquid media with crude oil as sole carbon and energy source. After 5 days' incubation, cell dry weight (CDW) and poly (3-hydroxybutyrate) (…
Pitch emulsions were prepared to mimic the colloidal wood resin system in paper mill process waters. The phase distribution of resin and fatty acids (RFAs) between the colloidal lipophilic droplets (l) and the water phase (w) were determined as pKlw values. The effect of triglyceride to RFA ratio on pKlw values was st…