Materials Literature
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A thermopower formula is derived for composites: [Formula: see text] (κ(i) and κ are the specific thermal conductivities, S(i) and S are the Seebeck coefficients of the phase i and the composite, respectively, and υ(i) is the volume fraction of the phase i). This formula can be applied for calculating the Seebeck coef…
We report on the electrical field control of ferromagnetism (FM) at room temperature in III-N dilute magnetic semiconductor (DMS) films. A GaMnN layer was grown on top of an n-GaN substrate and found to be almost always paramagnetic. However, when grown on a p-type GaN layer, a strong saturation magnetization (Ms) was…
Hydriding or oxidation of a metal nanoparticle starts on the surface and results in the formation of a hydride or oxide shell. Due to expansion of the shell, the strain in the metal core is tensile, and in principle it may induce the formation of a hollow structure (this hollow-formation mechanism is alternative to th…
Abstract The synthesis, spectroscopic, electrochemical, and optical properties of tetrasubstituted Co II , Cu II , and double‐decker Lu III phthalocyanines are reported. The new compounds were characterized by elemental analysis, IR and UV/Vis spectroscopy, and MALDI TOF mass spectrometry. Their electrochemistry was s…
Abstract The crystallization behavior of the blending system consists of homopolymer poly(ethylene oxide) (h‐PEO) with different molecular weights, and polystyrene‐ block ‐poly (ethylene oxide)‐ block ‐polystyrene (PS‐ b ‐PEO‐ b ‐PS) triblock copolymer has been investigated by DSC measurements. The crystallization of…
Abstract In this work, a new elastomeric liner was introduced to protect the metal surfaces of storage tanks against corroding materials in petrochemical industries. This new liner was prepared on the basis of EPDM/NR and EPDM/SBR compounds. The elastomeric compounds were cured by using super‐heated water vapor at atm…
Abstract In this study, composites from alkali lignin and wheat gluten, modified with different percentages of sodium silicate, were prepared and characterized. Moreover, the addition of silica to the aforementioned composites was studied with the aim of improving the thermal and mechanical properties. The effect of w…
This work reports on the electronic properties of thin films of the Heusler compound Co2MnSi studied by means of hard x-ray photoelectron spectroscopy (HAXPES). The results of photoelectron spectroscopy from multilayered thin films excited by photons of 2?8?keV are presented. The measurements were performed on (substr…
Electrochemical impedance spectroscopy and potentiodynamic polarisation measurements were used to verify the effects of temperature and acetic acid (HAc) on the anodic and cathodic reactions in CO2 corrosion of 316L stainless steel in 3·5% NaCl solution. The tests were carried at 30, 60 and 90°C. The initiation concen…
A thermal conductivity study of RuO2 single crystals has been carried out via the photothermal deflection technique in transverse configuration at room temperature. The thermal diffusivity and conductivity of RuO2 crystals are determined to be 0.17 cm2 s−1 and 0.50 W cm−1 K−1, respectively. Furthermore, it was found t…
Interaction of noise with nonlinear electrochemical kinetics involving the etching of porous silicon is studied experimentally. It is realized that by monotonically increasing the level of internal noise, one can tune the regularity of the spatial distribution of pores in silicon nanostructures. This regularity of the…
Element-specific magnetic moments were investigated for epitaxial Ni2Mn1+xGa1−x and (Ni2MnGa)1−x(Co2FeSi)x Heusler films using x-ray absorption spectroscopy and x-ray circular magnetic dichroism in transmission. The epitaxial films of the Ni2MnGa-derived compositions were prepared by dc-sputtering on Al2O3 substrates…
This study demonstrates that a combination of unconventional electron microscopy techniques provides a quantitative means of assessing the degree of monodispersity of gadolinium (Gd) diethylenetriamine pentaacetic acid-conjugated polyamidoamine (PAMAM) dendrimers, which are designed for diagnostic imaging and deliveri…
Co2FeSi is predicted to be a half-metallic ferromagnet with an extraordinary high magnetic moment and Curie temperature. However, a low tunnel magneto-resistance ratio, a lower spin polarization and a lower magnetic moment were experimentally observed in thin film samples. Consequently, thin Co 2FeSi films of differen…
The complex formation of cylindrical brush polymers with poly(l-lysine) side chains (PLL) and sodium dodecyl sulfate (SDS) can induce a helical conformation of the cylindrical brush polymer in aqueous solution (Gunari, N.; Cong, Y.; Zhang, B.; Fischer, K.; Janshoff, A.; Schmidt, M. Macromol. Rapid Commun. 2008, 29, 82…
Hard x-ray photoelectron spectroscopy of buried Heusler compounds, Ouardi, Siham, Balke, Benjamin, Gloskovskii, Andrei, Fecher, Gerhard H, Felser, Claudia, Schönhense, Gerd, Ishikawa, Takayuki, Uemura, Tetsuya, Yamamoto, Masafumi, Sukegawa, Hiroaki, Wang, Wenhong, Inomata, Koichiro, Yamashita, Yoshiyuki, Yoshikawa, Hi…
This is the third cluster issue of Journal Physics D: Applied Physics devoted to half-metallic Heusler compounds and devices utilizing this class of materials. Heusler compounds are named after Fritz Heusler, the owner of a German copper mine, the Isabellenhütte, who discovered this class of materials in 1903 [1]. He…
The synthesis and characterization of second- and third-generation triazine dendrimers bearing carboxylic acid groups on the periphery are reported. These materials were synthesized by exhaustive succinylation of amine-terminated dendrimers. (1)H and (13)C NMR spectra are consistent with the desired products, but thes…
Abstract Two series of semi‐interpenetrating polymer network (semi‐IPN) composite films, PEI/bismaleimide (UTBM) and PEI/fluorinated BMI (UTFBM) were prepared using a thermoplastic PEI and two different crosslinkable imide moieties. The effects of chemical structure and content of crosslinkable imide moieties on therm…
The aim of the present study is to investigate the local strain band behavior in conjunction with the texture of NiTi thin sheets under mechanical loading. Firstly, we evaluate the transformation temperature by differential scanning calorimetry (DSC) and the internal structure by transmission electron microscopy (TEM)…