Materials Literature
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A novel solvothermal route has been developed to synthesize highly dispersed nanocrystalline barium titanate (BaTiO 3 ), using a mixture of ethylenediamine and ethanolamine as a solvent. The as‐synthesized BaTiO 3 nanoparticles were characterized by X‐ray powder diffraction, transmission electron microscopy (TEM), hig…
Using a novel, selective heating by Nd:YAG laser, a single‐crystal architecture is created in a model glass system, Sm 0.5 La 0.5 BGeO 5 , which devitrifies congruently into a ferroelectric phase of the same composition as the parent glass. The Sm 3+ ions in glass absorb the light and heat the matrix locally resulting…
Abstract The free‐radical grafting of maleic anhydride (MAH) and styrene (St) onto isotactic polypropylene (iPP) was studied by thermal decomposition of dicumyl peroxide (DCP) using supercritical CO 2 as a solvent and swelling agent. Several effects of molar ratio of monomer, soaking temperature and time, reaction tim…
We have determined the screened on-site Coulomb repulsion in graphite and single wall carbon nanotubes by measuring their Auger spectra and performing a theoretical analysis based on an extended Cini-Sawatzky approach [Solid State Commun. 24, 681 (1977); Phys. Rev. Lett. 39, 504 (1977)], where only one fit parameter i…
The microstructure and magnetic properties of Nd2Fe14B∕(Fe3B,α-Fe) nanocomposite magnet derived form crystallization of bulk amorphous Fe68Zr2Y4B21Nd5 alloy, which was prepared by copper mold casting, have been investigated. The obtaining maximum values of Ms, Mr, Hci, and (BH)max annealed at 963K for Fe68Zr2Nd5Y4B21…
Atomistic simulation methods based on pair‐wise interatomic potentials and energy minimization have been applied to elucidate the energetics of cation vacancies and the incorporation of 13 trivalent M 3+ cations (Cr 3+ , Ga 3+ , Fe 3+ , Lu 3+ , Yb 3+ , Er 3+ , Y 3+ , Tb 3+ , Gd 3+ , Eu 3+ , Sm 3+ , Nd 3+ , La 3+ ) in…
To obtain the electrical properties of strained ferroelectric thin films, bottom electrodes with lattice constants and thermal coefficients matched to both films and substrates are needed. The interface structure, strain configuration, and strain relaxation in such bilayer systems are different from those in single la…
This paper analyses the insulation characteristics of c-C 4 F 8 /CO 2 gas mixtures using the Monte Carlo method with the null-collision technique and studies the possibility of applying that in the gas insulation of power equipment. The density-normalized effective ionization coefficient (α − η)/ N for c-C 4 F 8 /CO 2…
We investigated the influence of the reduction state of gold ions on the growth of gold nanocrystals in N,N-dimethyl formamide (DMF). While freshly prepared solutions of AuCl3 produce spherical nanocrystals, aged precursor solutions containing mainly Au+ ions and Au(0) atoms lead to various branched nanoparticles. Fur…
We report the experimental observation of the self-generated stationary trains of envelope solitons in the left-handed nonlinear transmission line metamaterials. The trains of both bright or dark solitons, as well as switching between them, have been experimentally demonstrated in short transmission lines exhibiting s…
The authors investigated shot noise properties in the graphene-based double barriers. The shot noise with the Fano factor equal to 1∕3 is found to occur at all conductance minimums including the Dirac point, which is a combined result of Klein tunneling, resonant tunneling, and quasiparticle chirality. The similarity…
Thermal treatment transforms α‐Ca 2 [SiO 3 (OH)](OH) (α‐C 2 SH) into hydraulic Ca 2 SiO 4 polymorphs, which is a process of considerable interest to the cement chemistry community. The thermal behavior of differently synthesized samples of α‐C 2 SH in air at ambient pressure has been investigated in detail by high‐tem…
This paper dealt with the electrical properties of Ga:ZnO film deposited via pulsed laser deposition and the mechanisms responsible for conduction and scattering behavior in terms of temperature. Such film having a degenerate band exhibited the metallic characteristics except those observed below 100 and 60K for films…
Abstract Thermoresponsive shape memory polymers based on polyurethane with soft segment consisting of poly (tetramethylene oxide) (PTMO) and hard segment arising from urethane reaction of tolylene diisocyanate with OH terminal of PTMO and 1,4 butane diol (BD) were synthesized by a two‐ step process. The molar ratios o…
Abstract Sulfonated styrene-(ethylene-butylene)-styrene triblock copolymer (SSEBS) was synthesized by reaction of acetyl sulfate with SEBS. SSESB-clay nanocomposites were then prepared from hydrophilic Na-montmorillonite (MT) and organically (quaternary amine) modified hydrophobic nanoclay (OMT) at very low loading. S…
We studied the phase transitions, domain morphologies, and polarizations in BaTiO3∕SrTiO3 superlattices grown on SrTiO3 substrates. Using the phase field approach, we discovered the remarkable influence of film/substrate interfacial coherency on the ferroelectricity of the SrTiO3 layers within a superlattice: it is an…
In this paper, we report on the use of two PTCDI-melamine supramolecular networks on Au(111) to trap C70 molecules. The different supramolecular networks were formed by changing the postannealing temperature after molecular deposition. We observed, using scanning tunneling microscopy, that the deposition of C70 onto a…
(1− x )BiScO 3 − x PbTiO 3 (BSPT) nanopowder with an average grain size of 10 nm with the composition of x =0.64, which has been reported to be close to the MPB in the bulk BSPT ceramics, was successfully synthesized. Subsequently, the techniques of preparation of high‐performance fine‐grain MPB–BSPT ceramics by two‐s…
Multiwavelength Raman spectroscopy is employed to investigate ultrananocrystalline diamond films deposited by the plasma enhanced chemical vapor deposition technique. Recently, we have shown that the addition of nitrogen in the gas source during synthesis induce the formation of diamond $n$-type films, exhibiting the…
The effects of noble metal (NM) dopants (NM = Pt, Rh) on the structural and electronic properties of ceria are studied using a density functional theory (DFT) method, with the inclusion of on-site Coulomb interaction (DFT+ U ). It is found that these NM dopants give rise to large perturbations of the atomic and electr…