Materials Literature
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Abstract Four novel bridged‐amidines H 2 L {1,4‐R 1 [C(=NR 2 )(NHR 2 )] 2 [R 1 =C 6 H 4 , R 2 =2,6‐ i Pr 2 C 6 H 3 (H 2 L 1 ); R 1 =C 6 H 4 , R 2 =2,6‐Me 2 C 6 H 3 (H 2 L 2 ); R 1 =C 6 H 10 , R 2 =2,6‐ i Pr 2 C 6 H 3 (H 2 L 3 ); R 1 =C 6 H 10 , R 2 =2,6‐Me 2 C 6 H 3 (H 2 L 4 )]} were synthesized in 65%–78% isolated yi…
This paper is devoted to the technique for study of localized shear using hat-shaped samples by the split Hopkinson pressure bar (SHPB) method. Also it is devoted to results obtained in tests with samples of copper M1 and steel 09G2S. The tests were performed using hat-shaped samples with beforehand-determined directi…
An understanding of the fundamental mechanisms involved in the interaction between cavitation bubbles and structures is of importance for many applications involving cavitation erosion. Generally, the final stage of bubble collapse is associated with the formation of a high-speed reentrant liquid jet directed towards…
The liquid metal (LM) investigations of hydrodynamics and heat transfer affected by longitudinal and transverse magnetic field (MF) were carried out. The current experiments program deals with temperature and velocity fields, local and average heat transfer intensities, temperature fluctuation intensities in a horizon…
The effect of nonchromophoric additives on supramolecular exciton intensity was tested. Fatty acids and 1-dodecanol decreased exciton intensity of the tightly packed aggregate of 6'R-capsanthol-3'-on, whereas all esters studied increased exciton intensity. These results apparently confirm the validity of the treatment…
Magnetite (Fe304) nanoparticles have been synthesized by sol-gel method combined with annealing under vacuum, without use of surfactants and using precursors like FeCl3·6H20, ethanol and propylene epoxide and using several annealing temperatures and different annealing time. The approach is straightforward, inexpensiv…
During the process of biomineralization, living organisms use macromolecules to direct the nucleation and growth of a variety of inorganic materials. Because biomineral structures exhibit complex topologies, hierarchical design, and unique materials properties, an understanding of the underlying mechanisms of biomolec…
The investigation into synthesizing new metal organic compounds with the general formula Cu(S-pyrazine)X(2) using monosubstituted pyrazines has led to the generation of a new family of compounds Cu(S-pyrazine)(2)X(2) with similar structure and magnetic properties. The bis(S-pyrazine)dihalocopper(II) compounds [where S…
Two novel compounds KZn(4)SbO(7) (1) and KZn(4)Sb(3)O(12) (2) having quasi-white light emission and second-harmonic generation are prepared, and their single-crystal structures are characterized as P6(3)mc and R3 space groups, respectively. The crystal structure transition from high symmetry P6(3)mc of 1 to low symmet…
ZnFe 2 O 4 nanoparticles with a mean size ranging from 3 nm to 10 nm, have been prepared using the solvothermal method. The TEM images reveal a narrow particle size distribution for all samples. Bulk magnetic measurements indicate superparamagnetic behaviour with a blocking temperature (T B ) that increases from 10 K…
The spin Hamiltonian parameters, the g factors g i (i = x, y, z) and the hyperfine structure constants A i , and the local structure for Rh 2+ in rutile (TiO 2 ) are theoretically investigated from the perturbation formulas of these parameters for a 4d 7 ion under rhombically elongated octahedra. In view of the covale…
MCM‐41 have been used to custom synthesize catalysts in because of the controllable properties, such as pore size, active phase incorporation, crystal size, and morphology, among others. In this paper, a simple and versatile method for the incorporation of platinum, ruthenium, and palladium onto Al‐MCM‐41 mesoporous s…
Silver implantation (75 keV, 2 × 1014 ions/cm2) in ZnO ceramics was carried out at room temperature to characterize the diffusion phenomenon. Annealing caused Ag evaporation from the sample. Results suggest that it is difficult to incorporate Ag into Zn site by annealing. The Ag profile with the monotonous decrease in…
Thin fibers having diameters ranging from 25 nm to 2 micro-m were successfully electrospun from solutions of polylactides (PLA) having different molecular weights both in entangled and aligned fiber forms. The latter aligned fibers were collected with a new target comprising a rotor around which several fins were atta…
Due to its outstanding thermal properties, diamond is an attractive alternative to silicon as a monochromator material for high intensity X‐ray beams. To date, however, the practical applications have been limited by the small size and relatively poor crystallographic quality of the crystals available. The ESRF Diamon…
The development of a safe regeneration procedure which circumvents large temperature excursions during the exothermic regeneration is the current major technological challenge in the operation of diesel particulate filters. The cause of this local hot zone formation is still an open question. The maximum temperature a…
This paper presents a direct algorithm to implement non-local gradient-enhanced damage mechanics theories in the existing finite element codes with minor modifications and without the need to formulate a higher-order element. This method extends the algorithm of Abu Al-Rub and Voyiadjis (2005) to gradient-dependent da…
The purpose in this study is to investigate the effect of microstructure on the unique hardening behavior of dental silver alloy, Ag-20Pd-14.5Cu-12Au (mass%), fabricated by hot rolling process (AS material), which is in as-received condition, and liquid rapid solidification (LRS) process (LRS material). The following…
Reactions of laser-ablated copper atoms with carbon monoxide and dinitrogen in excess argon have been investigated by matrix-isolation infrared spectroscopy. The NNCuCO and (NN)(2)CuCO complexes, as well as copper carbonyls, are formed as reaction products during sample deposition and further annealing whereas no copp…
A partial cation exchange reaction between CdTe nanoparticles and Bi(3+) ions gives rise to spontaneous formation of two-dimensional Bi(2)Te(3)/CdTe nanosheets. The average size and thickness of the nanosheets are around 200 and 6.9 nm, respectively. Both CdTe and Bi(2)Te(3), which are there as the form of nanoparticl…