Materials Literature
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Polyelectrolyte solutions of Na-doped single-wall carbon nanotube (SWNT) salts are studied by Raman spectroscopy. Their Raman signature is first compared to undoped SWNT suspensions and dry alkali-doped SWNT powders, and the results indicate that the nanotube solutions consist of heavily doped (charged) SWNT. Raman si…
Spherical and chromatic aberrations limit the resolution of conventional electron microscopes. Both defects are unavoidable in the case of static rotationally symmetric electromagnetic fields (Scherzer’s theorem). To compensate for these aberrations, multipole correctors or electron mirrors are required. The correctio…
The polarization switching fatigue behaviors of tetragonal Pb(Zr0.1Ti0.9)O3(PZT0.1) thin films deposited on Pt-coated silicon wafers by the sol-gel method are investigated by testing the fatigue endurance at different temperatures and by measuring the small-signal dielectric loss associated with the fatigued samples.…
Abstract A new concept for a Si light emitting diode (LED) capable of emitting efficiently at 1.55 µm or at 1.3 µm, respectively, is proposed. It utilizes radiation from a well‐defined dislocation network created in a reproducible manner by direct Si wafer bonding. The wavelength of the light emitted from the network…
Two polycrystal models are implemented into the finite element code to model texture development for pure Al under uniaxial tensile deformation and cold rolling deformation with EBSD data. Both models predictions in tensile deformation are reasonable agreement with the experimental data. Texture development under cold…
The reinforcing mechanism of novel aramid pulp (AP) short fibre in CR matrix has been discussed in this paper, and it has been shown that the reinforcing effects of AP depend mainly on the dispersing uniformity and openness of those ultra-fine short fibres of AP in CR matrix.By proper pretreating method, the dispersin…
One of the major problems associated with analyzing polyelectrolyte complexes is the separation of strongly bound oppositely charged polymeric components. As part of a work aimed at better understanding the factors that affect polyelectrolyte complex formation and stability, an investigation of the possibility to rele…
A magnetic field of H=10T was applied perpendicularly or parallel to the surface of the 30BaO.15TiO2.55GeO2 (BTG) glass during its crystallization, and the effect of the magnetic field on the crystal orientation and second-order optical nonlinearity of the Ba2TiGe2O8 crystals formed at the glass surface was examined.…
The presence of hydrogen in steel decreases its toughness and formability leading to hydrogen embrittlement. To understand the failure mechanisms of steel due to the presence of hydrogen, a profound insight in the hydrogen household of the steel is needed. This includes a study of the solubility, the diffusion and the…
Multitrapping levels feature of thermoluminescent (TL) phosphors of CaSO4:RE (RE=Dy, Tb, and Sm) were analyzed using a variable heating rate method (including extremely slow heating rates of 0.001°Cs−1), the postannealing method, and the analysis of TL decay curves using x-ray induced luminescence (XIL) spectroscopy a…
Abstract The ion‐pair complexes [Ni(C 9 H 22 N 6 )][Cu(mnt) 2 ] ( 1 ), [Ni(C 9 H 22 N 6 )][Ni(mnt) 2 ] ( 2 ), and [Ni(C 9 H 22 N 6 )][Pd(mnt) 2 ] ( 3 ; mnt 2– = 1,2‐dicyanoethylenedithiolate, C 9 H 22 N 6 = 3,7‐bis(2‐aminoethyl)‐1,3,5,7‐tetraazabicyclo[3.3.1]nonane) have been synthesized and characterized by elemental…
The crystal and molecular structures of K4[(Httha)2]·13.5H2O (ttha = triethylenetetraminehexaacetic acid), K4[(Httha)2]·14H2O, K3[DyIII (ttha)]·5H2O, K3[HoIII(ttha)]·5H2O and K3[ErIII(ttha)]·5H2O have been determined by single-crystal X-ray structure analyses. The crystal data of these five complexes are as follows: (…
This paper describes the manufacturing and spectroelectrochemical characterization of all solid electrochromic devices (ECD). Both electrochromic (WO3) and storage ion (CeO2-TiO2) thin films were obtained by sol-gel method and deposited by dip-coating technique. The electrolytes were obtained by plasticization of star…
Abstract The injection of seawater into oil-bearing reservoirs to maintain reservoir pressure and improve secondary recovery is a well-established, mature operation. Moreover, the degree of risk posed by deposition of mineral scales to the injection and production wells during such operations has been much studied. Th…
The secondary electron emission yield of fullerene, graphite, and diamondlike carbon after low-energy N2+ ion bombardment was studied for antimultipactor applications. Nitrogen incorporation into the carbon thin films decreases their secondary emission yield, contrary to the hydrogen or oxygen effect. Carbon nitride s…
Nano-sized barium titanate powders were prepared by the high-gravity reactive precipitation (HGRP)-hydrothermal method. The properties and defects of hydrothermal barium titanate crystallites were investigated by TEM, XRD and FTIR. The mean particle size of the hydrothermal barium titanate was about 70 nm with narrow…
Mesoporous carbon with high surface area and ordered structure was synthesized via a nanocasting process using mesoprous MCM-41 silica as a template and sucrose as a carbon precursor. Sample was characterized by XRD, SEM, TEM and nitrogen adsorption. The results show that the templated carbon has a BTE surface area ∼1…
We prepared polycrystalline samples of R$_2$PdO$_4$ (R = La, Nd, Sm and Gd) using a NaCl-flux technique. The measured resistivity is of the order of 10$^3-10^4$ $\Omega$cm at room temperature, which is two orders of magnitude smaller than the values reported so far. We further studied the substitution effects of Ce fo…
A general review is first provided on the properties of this important member of the class of polyhydroxyalkanoate copolymers now being actively investigated as environmentally friendly materials. This soon to be commercialized material is already finding numerous applications and has the advantage of biodegradability…
The phase separation kinetics of polymer dispersed liquid crystals (PDLC) confined between two parallel, smooth walls are numerically studied for the first time. Only the two-dimensional (2D) system is considered for simplicity. The time evolutions of two order parameters (i.e., composition order parameter and orienta…