Materials Literature
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Fe-doped GaN thin films are grown on c-sapphires by metal organic chemical vapour deposition method (MOCVD). Crystalline quality and phase purity are characterized by x-ray diffraction and Raman scattering measurements. There are no detectable second phases formed during growth and no significant degradation in crysta…
The influence of the chemical structure of alkylammonium organo-modifying montmorillonite clays on the ability to form nanocomposites by melt blending, depending on the processing temperature and the organoclay thermal treatment, has been investigated. On one side chlorinated polyethylene/Cloisite 30B (nano)composite…
Theoretical Study on Electronic and Electrical Properties of Nanostructural ZnO, Zhu, Zhigang, Chutia, Arunabhiram, Sahnoun, Riadh, Koyama, Michihisa, Tsuboi, Hideyuki, Hatakeyama, Nozomu, Endou, Akira, Takaba, Hiromitsu, Kubo, Momoji, Carpio, Carlos A. Del, Miyamoto, Akira
A tubular-shaped polyaniline less than 5 microm in length and 170 nm in outer diameter was synthesized by a self-assembly process using D-camphorsulfonic acid as a dopant. A tubular-shaped nanocarbon was prepared from the tubular-shaped polyaniline by means of pyrolysis at 1000 degrees C in argon gas. The structural a…
The synthesis of platinum nanoparticle loaded LiCoO2 (Pt-LiCoO2) was carried out successfully by an impregnation method followed by sintering at different temperatures. The catalytic role of Pt-LiCoO2 composite in hydrogen generation during hydrolysis of sodium borohydride (NaBH4) was studied for fuel cell application…
A vacuum ellipsometer has been designed for probing the glass transition in thin supported polymer films. The device is based on the optics of a commercial spectroscopic phase-modulated ellipsometer. A custom-made vacuum chamber evacuated by oil-free pumps, variable temperature optical table, and computer-based data a…
We have fabricated local-electrolyte-gated carbon nanotube field-effect transistors (CNTFETs), in which the electrolyte functions as a local top gate. The local-electrolyte-gated CNTFETs in the electrolyte solution provided high performance in terms of subthreshold slope and transconductance, resulting from the modula…
The crystal structure and surface morphology of native oxide emerging on the surface of the (0001) cleavage of undoped and Cd-doped or Dy-doped single crystals of layered GaSe due to prolonged storage in air are studied. The factors that lead to the differences in the outward appearance of oxide films on the surface o…
A periodical interaction model of LDHs-Cl-yH2O has been proposed. The geometry optimization and energy of the layered double hydroxides (LDHs) were calculated using CASTEP/LDA method at the CA-PZ level. The distribution of H2O in the interlayer and the super-molecular interaction between host layer and guest anion hav…
This paper presents results from the concept evaluation, experimental trials, and design of a water detritiation facility (WDF) for the JET fusion machine. The design is based on the combined electrolysis and catalytic exchange process and will allow construction of the plant and for its integration into the JET triti…
Evanescent wave cavity ring-down spectroscopy (EW-CRDS) has been applied to study, in situ, the deposition kinetics of commercially available gold colloids on functionalized silica surfaces from quiescent solution. Neither 5 nor 20 nm citrate-stabilized nanoparticles were observed to adsorb on clean silica surfaces. A…
We present the results of our theoretical calculations on structural and electronic properties of hollow Zn n S n clusters as a function of the size of the clusters. Our results include the variation of radial distribution, Mulliken population, electronic energy levels, and band gap as a function of size for both sing…
Ultraviolet-visible, infrared and Raman spectroscopy together with thermal properties were measured for undoped and WO 3 - doped (up to 10%) lead borate glasses. Also, the effect of gamma irradiation was followed by UV-visible measurements. The UV-visible spectrum of the undoped glass reveals before irradiation intens…
The crystal structure of barytolamprophyllite, ideally (BaK) Na 3 Ti 3 (Si 2 O 7 ) 2 O 2 (OH) 2 , a 19.8971(7), b 7.1165(3), c 5.4108(2) A, β 96.676(2)°, V 760.96(3) A 3 , space group C 2/ m , Z = 2, D calc. 3.521 g.cm −3 , from Mt. Yuksporr, Khibina alkaline massif, Kola Peninsula, Russia, has been refined to R 1 = 2…
The alignment and patterning of cellulose fibers under magnetic fields are reported. Static and rotating magnetic fields were used to align cellulose fibers with sizes ranging from millimeter to nanometer sizes. Cellulose fibers of the millimeter order, which were prepared for papermaking, and much smaller fibers with…
A perovskite-type oxide, La0.8Sr0.2MnO3, was synthesized by the organic solvent sol-gel method. The desired metal cations were chelated in a solution by using citric acid as the chelating agent and absolute ethanol as the solvent. The thermal decomposition of the metal carboxylate precursor gels was studied by thermog…
The nonisothermal crystallization kinetic of Bi x Y 3− x Fe 5 O 12 (0.25≤ x ≤1.00) powders prepared by coprecipitation process has been investigated. The activation energy of crystallization was calculated by differential scanning calorimetry at different heating rates. The activation energies of crystallization of Bi…
The processes of deformation and destruction of finite-thickness targets during the high-velocity impingement of a group of compact impactors were numerically simulated. Three-dimensional calculations with the use of the finite-element method were performed within the framework of an elastoplastic model of the medium.…
We analyze the problems encountered in the additional purification of mother liquors and the possibility of optimizing this process, using mother liquor for the crystal growth of lithium iodate, α-LiIO 3 , as a model system. The ability of some crystals, e.g., those of hexagonal lithium iodate, to absorb cation impuri…
We have developed a method of directing or bending carbon nanotubes (CNTs) in the desired direction along a structure. The new method utilizes careful positioning of a catalyst with respect to the structure, so that the CNTs growing from the catalyst experience an effective van der Waals force from the structure. The…