Showing papers in "Current Applied Physics in 2012"

TL;DR: In this paper, the authors review the physics aspects of the new research thrusts, in which liquid crystals often meet other types of soft condensed matter, such as polymers and colloidal nano- or microparticle dispersions.

TL;DR: In this paper, chemical mechanical polishing (CMP) of sapphire, GaN, and SiC substrates was demonstrated with a colloidal silica slurry under acidic and alkaline slurry pH conditions.

TL;DR: In this article, the modulus data have been fitted using non-exponential Kohlrausch-Williams-Watts (KWW) function φ(t), and the value of the nonexponential parameter (β) is fairly low and nearly constant for different salt concentrations.

TL;DR: In this article, three starting solutions salts, namely: zinc acetate, zinc chloride and zinc nitrate, were used for spray pyrolysis technique using different precursors.

TL;DR: In this article, a TiO2 compact layer was deposited on the substrate by hydrolysis of TiCl4 aqueous solution, which showed ∼24% increase in the power-conversion efficiency compared with the bare cell.

TL;DR: In this paper, the photocatalytic activity of Pd-doped ZnO catalysts for decolorization of methyl orange (MO) solution was evaluated, and the results showed that increased adsorption ability of light and high separation rate of photoinduced charge carriers all play an important role in promotion of photocatalysis activity of pd-Doped ZNO nanostructure.

TL;DR: In this paper, a polyaniline conducting polymer nanocomposite with bacterial cellulose fibers was prepared and characterized by the chemical oxidative polymerization of aniline with bacteria, which exhibited the inherent properties of both components.

TL;DR: In this article, nano-sized copper hydroxide powder and copper (II) neodecanoate complex were synthesized to form copper metal films and applied to fabricate a loop-type RFID antenna tag and compared with that of conventional copper-etched and silver-paste antenna.

TL;DR: In this paper, the authors empirically demonstrated that the proton range and prompt gamma distribution are well correlated in the therapy energy range, and that measuring prompt gammas is a viable method for the clinical application.

TL;DR: In this paper, the effect of annealing on the microsctructural and optoelectronic properties of titanium dioxide (TiO 2 ) thin films prepared using sol-gel method onto silicon (Si) (100) and quartz substrates was reported.

TL;DR: In this article, the effects of aluminum dopant on the crystalline structure and orientation of the ZnO films have been investigated by X-ray diffraction (XRD) study.

TL;DR: In this paper, the lead sulfide (PbS) thin films were deposited on glass substrate using successive ionic layer adsorption and reaction (SILAR) method at different pH of the cationic precursor, keeping the pH of anionic precursor invariant.

TL;DR: In this article, an alternative platinum counter electrode in dye-sensitized solar cells (DSSCs), carbon materials based counter electrode were prepared using multi-walled carbon nanotubes (MWNTs)/graphene nano-sheets (GNS) composite by simple doctor blade method.

TL;DR: In this paper, a low-temperature hydrothermal method was used to synthesize nitrogen doped TiO 2 nanoparticles decorated on graphene sheets, and the resulting composites were characterized by X-Ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopic (XPS) and Transmission Electron Microscopy (TEM).

TL;DR: In this paper, the structural properties of the nano particles with the heat treatment temperature was studied by X-ray diffraction and Fe K-shell Xray absorption spectroscopy, showing that at lower annealing temperatures the nano particle comprise both maghemite and hematite phases.

TL;DR: In this article, the optical properties of Al−Ga codoped ZnO thin films were investigated by post-annealing, and correlations of optical-bandgap with Fermi-level shift and conduction band filling were suggested by schematic band diagrams.

TL;DR: In this article, the effect of Al-doping on the composition, structure, optical, electrical and photoluminescence properties of the synthesized layers was determined using appropriate techniques.

TL;DR: In this article, the optical properties of the as-deposited and annealed films of 5, 10, 15, 20, 20-Tetraphenyl-21H, 21H, 23H-Porphyrin nickel (II), (NiTPP) were investigated using spectrophotometric measurements of both transmittance and reflectance at normal incidence of light in the wavelength range, 200-1100nm.

TL;DR: In this article, a series of Al-substituted Co 2 W hexaferrites synthesized by sol-gel autocombustion method have been investigated by DTA/TGA analysis, FTIR spectroscopy, X-ray Diffractometer and field emission gun scanning electron microscopy (FEGSEM).

TL;DR: In this article, the voltage dependent profiles of resistance (Ri) were obtained from both the forward and reverse bias I-V and C-V measurements by using Ohm's Law and Nicollian methods.

TL;DR: In this article, highly oriented and well defined zinc oxide (ZnO) nano/micro-scale structures are grown on the glass substrates using aqueous chemical route and characterized by X-ray diffraction pattern (XRD), scanning electron microscope (SEM) and optical absorption techniques.

TL;DR: In this article, the vibration characteristics of single and double-walled carbon nanotubes under various layerwise boundary conditions at different lengths are investigated by the use of molecular dynamics simulations based on the Tersoff-Brenner and Lennard-Jones potential energy functions.

TL;DR: In this paper, a patternable solution-crystallized organic transistors are developed with high carrier mobility that exceeds 10 cm 2 /V. The authors have investigated techniques of crystallization during the fabrication of organic semiconductor thin films from solution.

TL;DR: In this paper, a template-free cathodic electrodeposition from aqueous solution of Mn(NO3)2 on steel substrate and followed by heat treatment is achieved via a two-step process.

TL;DR: In this paper, the role of impurity atoms in improving the ferroelectric and insulating properties of BiFeO3 thin-film applications is discussed. But the authors focus mainly on the role played by these impurity atom substitutions by which the ferromagnetic properties of the films are significantly improved.

TL;DR: In this article, the field dependence of dielectric relaxation and conductivity was measured over a wide frequency range from room temperature to 673 K. The results indicated a large polaron hopping type of conduction mechanism.

TL;DR: In this paper, an analytical model for predicting surface effects on the free transverse vibrations of piezoelectric nanowires (NWs) is developed based on the non-local Euler-Bernoulli beam theory.

TL;DR: In this article, the dispersion behavior of graphene oxide and oxidized carbon nanotubes (o-CNTs) in a polar solvent was examined, as well as the differences in the behavior related to the Hansen solubility parameter windows.

TL;DR: In this article, a facile and effective electrochemical route for directly growing polyaniline (PANI) nanowires (NWs) on platinum interdigitated microelectrode was successfully developed.

TL;DR: The fundamental work towards new materials such as p-type active semiconductive oxides, a prerequisite for oxide based electronic circuits are reported on, as well as recent findings on high performance ZnO:Al films for a-Si:H/μc:H thin film photovoltaics and on high power impulse magnetron sputtering of ITO for ice-free windshield applications for automobiles.