Materials Literature
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Abstract Upon using a reactant/oxygen mixture as co‐feed in partial oxidation, adsorbed surface molecular oxygen species can cause low selectivity. We propose a concept different from the conventional co‐feed partial oxidation process in packed‐bed reactors. In this new configuration, the activation of oxygen is separ…
This paper describes how tool rake angle affect the chip formation during large strain extrusion machining. The simulation studies were corroborated by experiments where pure copper workpieces were extrusion machined using different rake angles and the machined chips were characterized for microstructure and mechanica…
While the Glaser-Hay coupling of terminal alkynes is a useful reaction, several issues associated with chemoselectivity preclude its widespread application in synthetic chemistry. To address these issues, a solid-supported Glaser-Hay methodology was developed to afford only asymmetric diyne products. This methodology…
The similarity between the structure of Islamic decorative patterns and quasicrystals has aroused the interest of several crystallographers. Many of these patterns have been analysed by different approaches, including various kinds of ornamental quasiperiodic patterns encountered in Morocco and the Alhambra (Andalusia…
Langmuir–Blodgett films of ferroelectric liquid crystal (LC) doped with low concentration of single-wall carbon nanotubes have been prepared and characterised. Pressure–area isotherms show that the films are stable and have good spreading properties. The interaction between nanotubes and LC molecules in the monolayer…
The proline-utilization pathway in Mycobacterium tuberculosis (Mtb) has recently been identified as an important factor in Mtb persistence in vivo, suggesting that this pathway could be a valuable therapeutic target against tuberculosis (TB). In Mtb, two distinct enzymes perform the conversion of proline into glutamat…
This chapter addresses present-day views on the synthesis, properties and applications of nanodiamonds fabricated by the detonation of strong explosives, the so-called detonation nanodiamonds (DND). The chapter focuses primarily on the results of DND studies, which have been reliably established and universally accept…
[email protected] urchin-like assemblies are synthesized. The tips of these products are as tiny as 10 nm, arm apex angles are 39°, and a large amount of “crossing areas” between urchin-like particles are produced due to peculiar magnetically induced assembling. These advantages make them powerful SERS probes for chem…
Simultaneous fitting of small- (SAS) and wide-angle (WAS) X-ray total scattering data for nanoparticles has been explored using both simulated and experimental signals. The nanoparticle types included core/shell metal and quantum-dot CdSe systems. Various combinations of reciprocal- and real-space representations of t…
ABSTRACT The synthesis of poly(butylene succinate) (PBS) of M w ranging from 4000 to 180,000 g mol −1 is realized with molar ratios [COOH] 0 /[OH] 0 of 1 and 0.98, and varying amounts of titanium (IV) tetrabutoxide (TBT) catalyst. Polycondensation kinetics are followed by chemical titration of carboxylic groups, and t…
We report the results of the studies on polycrystalline nanostructured La 0.7 Pb 0.3 MnO 3 (LPMO) manganites synthesized using sol–gel method employing metal acetate precursor route. Interestingly, it is observed that crystallite size decreases with increase in sintering temperature while microscopic investigations re…
Using a metal nanocavity, we measure absolute values of the photoluminescence quantum yield in a mixture of different types of chromophores (dye molecules and semiconductor nanocrystals). We show that measurements can be performed in an attoliter volume, both in liquid and solid phases, even if both types of chromopho…
Abstract Gold and silver nanoparticles with a narrow size distribution were grown in situ on the surfaces of Cu 2 O nanocubes through a wet‐chemical reduction route. The Cu 2 O nanocubes serve as both the substrate and reducing agent. The as‐prepared Cu 2 OAu and Cu 2 OAg nanocomposites still retain the cubic morpho…
The permittivity and permeability of Zn or Zn(Fe) nanoparticles with core-shell structure were investigated for frequencies from 2 to 18 GHz. The particles contain oxides shell in the form of ZnO, while the core material is Zn or Zn(Fe). The resonance frequency in permittivity corresponds to the maximum microwave abso…
The proposed article describes the development of a new beam finite element for the coupled thermomechanical analysis of shape memory alloy actuators. The element is formulated, assuming coupled equilibrium equations for the thermoelastic stresses and thermal loads. Displacements and temperature are treated as interna…
Abstract Core–shell structural magnetic nanocatalysts, involving carbon‐coated magnetic Fe 3 O 4 nanoparticles supported on graphene oxide sheets (mildly reduced graphene oxide (MRGO)/Fe 3 O 4 @C) and carbonaceous coatings on magnetic Fe 3 O 4 nanoparticles (Fe 3 O 4 @C), for immobilizing metal (Cu II , Co II , Fe III…
Nanodiamond powder, first discovered in 1963 in the Soviet Union, has recently become one of the most promising and well-studied nanomaterials applied in various fields of science, technology and medicine. However, in spite of the unique properties of nanodiamonds, developed applications and the scaled manufacturing p…
Abstract The edge state, which is a peculiar magnetic state in zigzag-edged graphene nanoribbons (ZGNRs) originating from an electron–electron correlation in an edge-localized π-state, has promising applications for magnetic and spintronics devices and has attracted much attention of physicists, chemists, and engineer…
We present a systematic study of membrane structure (pore diameter and arrangement) in anodized aluminum oxide (AAO) layers obtained by anodization voltages 8–20 V in sulfuric and 15–40 V in oxalic acid electrolyte solutions. Anodization of bulk aluminum in sulfuric acid at 10 V potential was found to be optimal for p…
Melting of metallic plasma facing components such as tungsten (W) divertor, macroscopic melt motion, and melt splashing due to edge localized modes and plasma disruptions is a major concern in fusion devices such as ITER. The viscous stability analysis and computational modelling of coupled W-melt-plasma flows are per…