Materials Literature
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Packed bed reactors using metal hydride are attracting a lot of attention as potential hydrogen storage systems. Some operational and design variables are major constraints to obtain a proper infl ow/outfl ow of hydrogen into a metal hydride reactor. These variables include packed bed thermal conductivity, porosity, p…
A new deep red-emitting Mn 2+ -activated CaLaGa 3 S 6 O phosphor was prepared by using a solidstate reaction method. X-ray diffraction studies confirm a tetragonal structure with space group P 2 1 m . The emission spectrum showed a broad band with an emission maximum at 676 nm under a host excitation of 332 nm. The op…
This paper concerned nanocrystalline cellulose(NCC)’s isolation from microcrystalline cellulose(MCC) by sulfuric acid hydrolysis, meanwhile centrifuging, ultrasonic treatment and freeze-drying were carried out afterwards. It covered the effect of reaction conditions on the yield of NCC. It indicated that hydrolysis ti…
The paper presents several actions in the field of waste heat harvesting from exhaust gas and surfaces of diesel engines by means of thermoelectric modules. It illustrates preliminary research work performed by the authors for the investigation of TEG efficiency when mounted on diesel engine exhaust gas systems, stres…
Abstract A method to estimate the portion of wetted area and the intrinsic wettability state (hydrophobic versus hydrophilic) of elements of texture in the case of a heterogeneous wetting regime is proposed and discussed.
There are several methods for synthesizing polylactic acid. Solid-state polymerization is one of the most promising methods due to the great feasibility and beneficial properties of the final polymer. In terms of this study, the purpose was to evaluate the effect of various catalyst systems (based on tin dichloride, t…
We have characterized the electronic structure of FeSe1−xTex for various x values using soft x-ray photoemission spectroscopy (SXPES), high-resolution photoemission spectroscopy (HRPES) and inverse photoemission spectroscopy (IPES). The SXPES valence band spectral shape shows that the 2 eV feature in FeSe, which was a…
Nature and biology utilize a myriad of structures, materials, and schemes to achieve superb sensing performance with extreme reliability and robustness. One structure used more commonly in nature is the “hair”. Hair-like sensors are used for acoustic, chemical, flow, pressure, and gas sensing, among others. Hair-like…
Chirality can be manipulated in multilayer three-dimensional helices. Multiple backbone helices can be effectively designed and fabricated, preserving their unique electromagnetic properties of chiral metamaterials. Chirality is boosted in double helices. The chirality index is four times higher than in single helices…
Composites of polypropylene and carbon black were melt compounded by a vibration-assisted process. For comparison, conventional extrusion was also used for preparation of the same composites. A throughput of the vibration-assisted process was established to be higher than that of conventional extrusion. Microscopic im…
Abstract meso-Tetrakis(pentafluorophenyl)porphyrin reacts at higher temperature with unstable iminonitriles (R–C≡N+–N−–Ar), affording pyrazoline-fused chlorins, according to dipolar [3 + 2]-cycloaddition pathway. The respective iminonitriles were in situ generated from the corresponding functionalized α-halogenohydraz…
Abstract Commonly used liquids have a powerful effect on the tribocharge patterns formed by rubbing polyethylene (PE) and poly(tetrafluoroethylene) surfaces. Solvents previously absorbed on PE specifically suppress positive tribocharge deposition. When applied to previously tribocharged surfaces, they also behave as c…
Coexistence between superconductivity and magnetism is reported for the KxMoO2−δ samples. Photoemission experiments show that the presence of Mo3+ ions is responsible for the weak ferromagnetic ordering observed in the KxMoO2−δ samples. Magnetic ordering temperature and superconducting critical temperature (TC) ratio…
Scaling effects on the gate capacitance of graphene nanoribbon field-effect transistors (GNRFETs) are studied by means of a semi-analytical model. The influence of nanoribbon width, gateinsulator thickness and dielectric constant scaling on the capacitance - voltage characteristics is explored. Gate capacitance has no…
Melt spun ribbon of Fe73Ga27 was prepared and characterized for microstructural features and magnetostriction. The phase equilibria observed from structural investigations have been correlated with Mossbauer studies. The magnetostriction of the melt spun ribbon has been found to be significantly large compared to the…
Interlamellar space of the smectite clay minerals have been found as an excellent nano phase reactor due to their easy swelling property and the adsorption capacity. In this work size quantized nano particles of catalytically active noble metals have been generated within the interlamellar space of the smectite type c…
The monolithic nanoporous copper (NPC) with ultrahigh specific surface area can be achieved through chemical dealloying of melt-spun Mg 12 at.% Cu alloy comprising α-Mg and Mg2Cu phases in an acidic solution at room temperature. The microstructure of the monolithic NPC ribbons was characterized using X-ray diffraction…
Fuel failure is most commonly induced in research and test reactor fuel elements by exposure to an under-cooled or over-power condition that results in the fuel temperature exceeding a critical threshold above which blisters form on the plate. These conditions can be triggered by normal operational transients (i.e. te…
We report on two new and improved glucose detection techniques based on surface enhanced Raman scattering (SERS) spectroscopy that are molecular specific to glucose and sensitive in the physiological concentration range (0.9 to 30 mM). Two novel methods were designed and evaluated to enhance the SERS signal of a Raman…
It has been shown that the electric polarization in multiferroic crystals exhibiting the magnetoelectric effect can be increased in the presence of the flexoelectric effect. The polarization in manganite-based perovskite-like multiferroics can be increased if the long axes of the rhombohedra formed upon the rhombohedr…