Materials Literature
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The use of di-2-pyridyl ketone oxime [(py)2CNOH] in reactions with Ni(O2CMe)2.4H2O, in the presence or absence of extra inorganic anions (N3- and SCN-) has led to Ni4, Ni5, and Ni7 clusters; the magnetic study of the heptanuclear nickel(II) complex reveals an S = 3 ground state.
Abstract In our paper, we attempt to investigate methods of determining jersey porosity which is this fabric’s principal physical characteristic. In fact, end use, liquid absorbency, thermal comfort and resistance are closely related to pore size and distribution. So it is important to study porosity, in order to clas…
Perfluorocarbon (PFC) nanoparticles can serve as a platform technology for molecular imaging and targeted drug-delivery applications. These nanoparticles are approximately 250 nm in diameter and are encapsulated in a phospholipid shell, which provides an ideal surface for the incorporation of targeting ligands, imagin…
Galvanic replacement reaction provides a remarkably simple and versatile route to metal nanostructures with controllable hollow interiors and porous walls. The key step of this process involves the replacement reaction between a suspension of nanoscale metal templates and a salt precursor containing a relatively less…
The theoretical performance of carbon nanotube field-effect transistors (CNFETs) with Schottky barriers (SBs) is examined by means of a general ballistic model. A novel approach is used to treat the SBs at the metal-nanotube contacts as mesoscopic scatterers by modifying the distribution functions for carriers in the…
The structural and electronic properties of pyrrole-, thiophene-, phosphole-, 3,4-ethylenedioxythiophene-, and 3,4-ethylenedithiafurane-containing oligomers have been studied using density functional theory with the B3PW91 functional and the 6-31+G(d, p) basis set. Calculations were performed on systems containing two…
The geometries, stabilities, and electronic properties of Bn and AlBn clusters, up to n=12, have been systematically investigated by using the density-functional approach. The results of Bn clusters are in good agreement with previous conclusions. When the Al atom is doped in Bn clusters, the lowest-energy structures…
The ability of light‐weight all fiber‐reinforced polymer‐matrix composite armor and hybrid composite‐based armor hard‐faced with ceramic tiles to withstand the impact of a non‐Armor‐ Piercing (non‐AP) and AP projectiles is investigated using a transient non‐linear dynamics computational analysis. The results obtained…
Whitlockite solid solutions Ca9−x M x R(PO4)7 (M = Mg, Zn, Cd; R = Ln, Y) were synthesized as powders and ceramics using solid-phase synthesis. Dielectric investigations and second harmonic generation (SHG) tests showed that ferroelectric (FE) phase transitions existing in samples with x = 0 change to antiferro-electr…
Covers advancements in spacecraft and tactical and strategic missile systems, including subsystem design and application, mission design and analysis, materials and structures, developments in space sciences, space processing and manufacturing, space operations, and applications of space technologies to other fields.
Crosslinked polyvinyl alcohol (PVA) and chitosan polymer blends have been prepared by using gamma irradiation. Chitosan was used in the blends to prevent microbiological growth, such as bacteria and fungi on the polymer. The physical properties of the blend, such as gelation, water absorption, and mechanical propertie…
A new model for silver electrochemical migration is presented, which includes the insulation resistance degradation prior to dendritic growth. This failure model reported is based on the calculation of the ion accumulation rate. Failure occurs when the accumulated ion concentration exceeds the threshold. Experimental…
The development status of 9Cr–oxide dispersion strengthened (ODS) ferritic steels was reviewed, focusing on the authors' activities. This material is the most prospective cladding of the advanced high burn-up fuel elements for Japanese prototype fast breeder reactor MONJU and international Generation IV advanced fast…
Sr Ru O 3 (SRO) acts as an effective buffer layer for growth of multiferroic BiFeO3 (BFO) thin films deposited on Pt∕TiO2∕SiO2∕Si substrates by radio frequency sputtering. Phase identification by using x-ray diffraction and texture studies by using atomic force microscopy show that the SRO buffer layer promotes crysta…
In this study, Bi 2 O 3 -doped bismuth potassium titanate, (Bi 1/2 K 1/2 )TiO 3 , (abbreviated to BKT-Bi x ; x =0, 0.1, 0.2, 0.4, and 0.6 wt %) ceramics were fabricated by hot-pressing method, and its electrical properties were investigated in detail. Moreover, BKT-Bi0.6 was annealed at 1040 °C for 4–20 h to develop g…
Abstract Titanium alloys exhibit an excellent corrosion resistance in most aqueous media due to the formation of a stable oxide film and some of these alloys (particularly Ti‐6Al‐4V) were chosen for surgical and odontological implants for this resistance and their biocompatibility. Treatments with fluorides (F − ) are…
High-purity carbon nanotubes (CNTs) are produced by chemical vapour deposition of camphor, an environment-friendly hydrocarbon. In a small CVD reactor (1-m long and 26- mm wide), CVD of 3 g camphor at 650°C for 1 hour yields ∼1.62 g MWNTs of diameter ∼10 nm with an as-grown purity over 88%; that is, camphor-to-CNT pro…
A multicathode high current pulsed cathodic arc has been used to deposit Ti2AlC thin films belonging to the group of nanolaminate ternary compounds of composition Mn+1AXn. The required stoichiometry was achieved by means of alternating plasma pulses from three independent cathodes. We present x-ray diffraction and tra…
In the present study, based on a biomimetic approach, novel 3D nanofibrous hybrid scaffolds consisting of poly(epsilon-caprolactone), poly(vinyl alcohol), and chitosan were developed via a multi-jet electrospinning method. The influence of chemical, physical, and structural properties of the scaffolds on the different…
Processes to fabricate tubular solid oxide fuel cells (SOFCs) using various electrolyte and electrode materials have been investigated. Single‐phase perovskite strontium‐ and magnesium‐doped lanthanum gallate (LSGM) was synthesized. Mechanical and thermal properties, and the cell performance of LSGM electrolyte fuel c…