Materials Literature
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We studied the electrical properties of a carbon nanotube (CNT) via interconnect fabricated by a novel damascene process which is mostly compatible with conventional Cu interconnects. It was found that the resistance of 60-nm-height vias was independent of temperatures as high as 423 K, which suggests that the carrier…
Systematic investigation of large amplitude ac excitation effects on the polarization–electric-field (P-E) and strain–electric-field (ε-E) characteristics of both “hard” and “soft” Pb(Zr,Ti)O3 ceramics was performed. Upon ac excitation, a gradual disappearance of the shift on P-E response along the E axis (Eint) was o…
Abstract At the slow strain rate tensile tests done using the specially designed facility, the decrease in the elongation to fracture, reduction of area, fracture energy and no effect on the strength have been stated for the low alloy ferrite‐pearlite and sorbite steels, polarized in synthetic sea water at potentials…
Fe8 high-spin molecules exhibit quantum spin tunneling at very low temperatures. Eight Fe3+ ions are sixfold coordinated and magnetically coupled through oxygen bridges. The net magnetization (MS=20 μB per molecule) results from competing antiferromagnetic interactions between the various Fe3+ ions (S=5/2). Because of…
The defect models of two trigonal Ti3+ centers in the LaMgAl11O19:Ti3+ (LMA:Ti3+) crystal are resuggested as center 1 at the 2a site and center 3 at the 4f site. By using the crystal field parameters Dq based on the suggestion, the g factors g∥ and g⊥ for both Ti3+ centers are calculated from two microscopic spin-Hami…
We have investigated the detailed phonon dynamics of the magnetoresistant lanthanum manganite $(\mathrm{La}\mathrm{Mn}{\mathrm{O}}_{3})$ using a shell model with pairwise interionic interaction potential. The investigations include the computation of the phonon density of states, the specific heat, the elastic constan…
The mean particle size, the microstrains, and the degree of inhomogeneity in compacted and dispersed nanostructured materials are determined from the broadening of diffraction reflections. A method is described for separating the contributions from the small size of particles, the microstrains, and the inhomogeneity o…
In recent years the concept of "colloidal devices" has emerged. These include colloidal crystals with photonics properties, as well as displays, machines, and other assemblies having a particular purpose. The assembly of colloidal devices, or even simpler assemblies, can proceed with top-down approaches, applied field…
We develop Monte Carlo simulation and theory to study the statistical strength characteristics of twisted fiber bundles.These consist of fibers that follow a Weibull distribution for strength with shape parameter ρ, and are arranged in an ideal helical structure with surface helix angle α s .Fiber interactions are con…
Abstract In order to prepare novel molecular arrangements of a fluorophore that result in new solid-state fluorescence properties, we fabricated a ternary system consisting of anthracene-2,6-disulfonic acid (ADS), aliphatic primary amines and guest molecules as a fluorophore, arrangement-controlling parts and molecula…
Abstract Turkey has a long tradition (starting with prehistoric civilizations) and experience in exploring for raw clay materials and processing them into ceramic products. Many of these products, such as tiles and sanitary ware, are manufactured for domestic and export markets. Kaolin is one of the raw materials of m…
Polymer materials are required to be used in radiation environments of space and nuclear power stations as insulation materials. For the use of polymer materials in such regions, it must be confirmed whether the electrical performance under radiation environments is different from that without radiation. This paper de…
Nano-ordered hybrid films of layered double hydroxide (LDH) nanosheets and two types of anionic dye molecules, i.e. tetrakis(4-carboxyphenyl)porphyrin (TCPP) and 1,3,6,8-pyrenetetrasulfonic acid (PTSA), were prepared by a layer-by-layer deposition (LBL) method. Photo-induced energy transfers (PET) between the PTSA and…
Stress corrosion cracking (SCC) tests were conducted on American Petroleum Institute (API) grade X-70 line pipe steel using smooth specimens in a standard near neutral pH solution, NS4. Both constant loading and cyclic loading conditions were employed. There were some SCC cracks on the surfaces of specimens under cons…
The electronic structures and spectroscopic properties of the three tridentate cyclometalated Pt(II) complexes Pt(N/\N/\C)C(triple bond)CPh (N/\N/\CH = 6-phenyl-2,2'-bipyridine) (1), Pt(N/\N/\S)C(triple bond)CPh (N/\N/\SH = 6-thienyl-2,2'-bipyridine) (2), and Pt(N/\N/\O)C(triple bond)CPh (N/\N/\OH = 6-furyl-2,2'-bipyr…
This paper presents a method for the determination of the mean path length of the 25 cm Epstein frame. The proposed method employs two Epstein frames of different dimensions. A standard 25 cm and a revised 17.5 cm Epstein frame were built. The corner areas of the two frames were kept identical. By subtracting the abso…
Because of their specific properties (mechanical, electrical, etc), carbon nanotubes (CNTs) are being assessed for inclusion in many manufactured products. Due to their massive production and number of potential applications, the impact of CNTs on the environment must be taken into consideration. The present investiga…
The bandwidth and loss characteristics of negative-refractive-index transmission-line (NRI-TL) metamaterials are examined in the limit of the model of coupled C-L resonators. It is analytically shown that the tighter the coupling between resonators, the wider the size of the backward passband and the smaller the propa…
Abstract The growth of hexagonal GaN (h‐GaN) films on the nitridated β‐Ga 2 O 3 substrates using radio‐frequency. molecular beam epitaxy (RF‐MBE) was investigated. The β‐Ga 2 O 3 single crystal prepared by optical floating zone method was used to a substrate for GaN film growth, and nitridated by exposing to electron…
Isotropic Nd-Fe-B thick film magnets were prepared by a high-speed pulsed laser deposition method followed by a post annealing. The deposition rate of 90 mum/h could be successfully achieved, and a pulse annealing was adopted as the post annealing process in order to enhance coercivity. Use of a substrate heating syst…