Materials Literature
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A thermal activated sub-hertz frequency dielectric absorption process in both SmC* and SmA* phases along with characteristic Goldstone mode have been observed in both pure and silver nano particle doped liquid crystal mixtures. This process is well resolved, in particular, in the composites probably due to capturing o…
The interplay and coexistence of superconducting, magnetic, and structural order parameters in NaFe${}_{1\ensuremath{-}x}$Co${}_{x}$As have been studied using superconducting quantum interference device magnetometry, muon spin rotation, and synchrotron x-ray powder diffraction. Substituting Fe by Co weakens the ordere…
The aim of this study was to study the effect of ZnO concentration on the morphology, mechanical, and crystallization behaviors of iPP. Three compositions of iPP/mZnO and iPP/nZnO composites were prepared in a co-rotational twin-screw extruder machine with ZnO content of 2 wt%, 5 wt%, and 8 wt%. Tensile tests showed t…
The vortex liquid-to-glass transition has been studied in Ba0.72K0.28Fe2As2 (BaK-122), Ba(Fe0.91Co0.09)2As2(BaCo-122), and Ba(Fe0.95Ni0.05)2As2(BaNi-122) single crystal with superconducting transition temperature, Tc = 31.7, 17.3, and 18 K, respectively, by magnetoresistance measurements. For temperatures below Tc, th…
The synthesis and photophysical properties of several porphyrin (P)-phthalocyanine (Pc) conjugates (P-Pc; 1-3) are described, in which the phthalocyanines are directly linked to the β-pyrrolic position of a meso-tetraphenylporphyrin. Photoinduced energy- and electron-transfer processes were studied through the prepara…
Pansharpening is a branch of data fusion, more specically of image fusion, which is receiving an ever-increasing attention from the remote sensing community. New-generation spaceborne imaging sensors operating in a variety of ground scales and spectral bands provide huge volumes of data having complementary spatial a…
We report the use of time- and angle-resolved two-photon photoemission to map the bound, unoccupied electronic structure of the weakly coupled graphene/Ir(111) system. The energy, dispersion, and lifetime of the lowest three image-potential states are measured. In addition, the weak interaction between Ir and graphene…
Multifunctional Fe 3 O 4 @SiO 2 @Y 2 O 3:Eu 3+ composites were prepared with a facile solvothermal method followed by a subsequent heat treatment. Their structure and magnetic and luminescent properties were analyzed and discussed. Y 2 O 3:Eu 3+ phosphor as a shell was coated on the surface of Fe 3 O 4 @SiO 2 as the c…
Donors near the polar (0001) surface of nominally undoped ZnO were investigated with scanning tunneling microscopy at 5 K. Spatially resolved spectroscopy reveals single and double charging. Equidistant peaks in spectra of ionized donors are attributed to polaron excitation. The data are consistent with doping due to…
Lattice vibrations of highly a-axis oriented CoFe2O4 (CFO) films have been investigated by Raman scattering in the temperature range of 80-873 K. The five phonon modes T1g(2), T1g(3), Eg, A1g(1), A1g(2), and their evolutions can be uniquely distinguished. It was found that an electron transfer between Co2+ and Fe3+ ca…
The influence of interfacial interactions and annealing time on dynamics of the α-relaxation in ultrathin poly(vinyl acetate) films deposited on different substrates has been studied using local dielectric spectroscopy at ambient pressure and controlled humidity. After annealing at 323 K for about 3 days, for polymer…
We report here on the first study of the growth kinetics of high-yield, vertical CuO nanowires on silicon substrates produced by the process of thermal oxidation. The length of the CuO nanowires could be tuned from several to tens of micrometers by adjusting the oxidation temperature and time. The grown CuO nanowires…
Blend films containing wild-type poly[( R )-3-hydroxybutyrate]] (P(3HB)) and ultrahigh-molecular-weight P(3HB) (UHMW-P(3HB)) (compositions of 5/95 and 10/90 w/w) were prepared by solvent-casting and subsequent cold-drawing. The thermal properties, crystallization behavior, mechanical properties, and highly ordered str…
Literature data are used to examine the current status of the problem of effective oxidation protection for carbon materials; materials capable of protecting fibers from oxidation, including inorganic polymers, such as oxides, carbides, nitrides, borides, silicides, and their combinations; coating procedures and condi…
Close-packed monolayers of 20 nm Au nanoparticles are self-assembled at hexane/water interfaces and transferred to elastic substrates. Stretching the resulting nanoparticle mats provides active and reversible tuning of their plasmonic properties, with a clear polarization dependance. Both uniaxial and biaxial strains…
The authors report layer dependent physical responses of graphene-based polymer composites to near-infrared (NIR) light. Thin film polymer composites were fabricated and compared utilizing both single layer graphene and few layer graphene (∼5 layers). NIR-induced axial stress and kinetics were measured and found to ex…
A novel and facile approach is developed to synthesize a magnetic nanoparticle (iron oxide)-doped carbogenic nanocomposite (IO-CNC) for magnetic resonance (MR)/fluorescence imaging applications. IO-CNC is synthesized by thermal decomposition of organic precursors in the presence of Fe(3) O(4) nanoparticles with an ave…
By means of experiment and simulation, we achieve unprecedented insights into the formation of Talbot images to be observed in transmission for light diffracted at wavelength-scale amplitude gratings. Emphasis is put on disclosing the impact and the interplay of various diffraction orders to the formation of Talbot im…
Electron energy-loss spectroscopy (EELS) is used to analyze single-layered hexagonal boron-nitride with or without point defects. EELS profiles using a 0.1 nm probe clearly discriminate the chemical species of single atoms but show different delocalization of the boron and nitrogen K edges. A monovacancy at the boron…
In this research, bending and drape properties of woven fabrics and the effect of weft density, weft yarn count and warp tension on these properties were investigated. Higher values were found for bending rigidities of the fabrics woven with thicker weft yarns and at higher weft densities. It was seen that bending rig…