Optical characteristics of an oxyfluoride glass waveguide formed by a proton implantation
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Yue Wang, Yuan Shen, Rin-Lin Zheng, Jian-Ping Shen, Hai-Tao Guo, Chun-Xiao LiuAbstractAn optical waveguide was fabricated by H+ ion implantation with an energy of 400 keV and a dose of 8 × 1016 ions/cm2 in the oxyfluoride glass for the first time to the best of our knowledge. The dark mode spectra of the waveguide were measured by a prism coupling method before and after the thermal treatment. The number of modes was reduced after annealing. The implantation process of 400 keV H+ ions into the oxyfluoride glass was simulated by ...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Study and investigation of phosphorus doping time on emitter region for contact resistance optimization of monocrystalline silicon solar cell
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): M.K. Basher, M. Khalid Hossain, R. Afaz, S. Tayyaba, M.A.R. Akand, M.T. Rahman, N.M. EmanAbstractIn this paper, contact resistance of monocrystalline silicon solar cells was optimized by the variation of phosphorus doping time on emitter region. Wet-chemical texturization was performed to form pyramidal structure on silicon wafer surface. The surface morphology of the textured wafers was studied by field emission scanning electron microscope (FESEM) and surface reflection measurement (SRM). The textured wafers were doped by varying phosphorus d...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

The effect of annealing temperature and Al dopant on characterization of ZnO thin films prepared by sol-gel method
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Sabah Habeeb Sabeeh, Ruaa Hashim JassamAbstractIn this project, the sol-gel technique was used to prepare Zinc Oxide (ZnO) thin film and deposited on glass substrate by dip coating method. Zinc acetate dihydrate was used as a source of Zinc ions. The effect of annealing temperature temperatures (300, 400 and 500) °C, Aluminum dopant concentration (3 wt% and 5 wt%) on the properties of ZnO thin film were investigated and analyzed by using X-ray diffraction for structural properties, SEM for morphological properties, UV–VIS for op...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Quench and recovery characteristics of second-generation high-temperature superconducting GdBCO coated conductor with various patterns of stabilizers
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Y.H. Choi, J.C. Kim, Y.G. Kim, J.S. Kim, T.K. Ko, Y.S. Choi, H.G. LeeAbstractThis paper investigates the quench and recovery characteristics of second-generation high-temperature superconducting GdBCO coated conductors (CC) with variously patterned stabilizers in over-current conditions. A chemical etching method was used to produce various patterns of stabilizer on GdBCO CC without degrading current-carrying capacity. From the results of the over-current testing of GdBCO CC tapes with variously patterned stabilizers, the tape that had stabiliz...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Formability analysis of aluminum double-layer sheets using a magnetorheological fluid
This study provides a scientific basis for improving the forming performance and comprehensive quality of low-plastic lightweight sheet. (Source: Results in Physics)
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Fatigue crack propagation characteristics of rubbery materials under variable amplitude loading
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Xiao-Li Wang, Mei-Ying Liao, You Xu, Xiao-Ang LiuAbstractFatigue failure is a critical issue frequently encountered by the rubber components in service. In this work fatigue crack propagation experiments with an edge-notched pure shear specimen under variable amplitude loading, which brings effectiveness in experiment time, are carried out. Based on the dispersed data of measured crack lengths versus number of cycles, an alternative method for dealing with the dispersed data is proposed and compared with two conventional methods used in constan...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Efficiency enhancement through flat intermediate band in Quantum dot solar cell
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Ali Imran, Jianliang Jiang, Deborah Eric, Muhammad Noaman Zahid, Muhammad Yousaf, Muhammad Ahmad, Syed Ali HassanAbstractQuantum dots (QD) are playing a vital role due to their multifunctionality such as small size and tuning the range of band and have achieved a considerable attention in the recent decade. In recent research, the efficiency of the solar cell (SC) has greatly been increased by application of QD. If these dots are grown systematically, may lead to the formation of the intermediate band (IB) which leads to the absorption of photo...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Detrimental effects of slimes on the flotation of rutile from eclogite ore
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Qian Chen, Bo Xu, Yangge Zhu, Hongqiang Li, Peng Chen, Yunliang Zhao, Hongchao Li, Shaoxian SongAbstractThe detrimental effects of slimes on the flotation of rutile from eclogite ore have been studied in this work in order to improve the separation efficiency of the flotation. The study was performed through particle size distribution measurement and mineralogical analysis. The results have demonstrated that the slimes were enriched in the concentrates, which became seriously with the increase of slime contents in feed ore. The presence of slim...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Flow interference of two side-by-side square cylinders using IB-LBM – Effect of corner radius
In this study, a two-dimensional Immersed Boundary Lattice Boltzmann Method (IB-LBM) is employed to investigate computationally effect of flow past a pair of square cylinders in side-by-side arrangement at Re=100, for various corner radii. Numerical simulations were performed simultaneously by varying center to center distance between two cylinders (1.5–5.0 D) in the transverse direction and by changing the corner radius (R) from R/D = 0.0 (square) to 0.5 (circular) with 0.1 increment. Aerodynamic characteristics, including the lift and drag coefficients, were quantitatively calculated and compared with each ot...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Copper oxide nanomaterial saturable absorber as a new passive Q-switcher in erbium-doped fiber laser ring cavity configuration
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Sinan Abdulhameed Sadeq, Sarah Kadhim Al-Hayali, Sulaiman Wadi Harun, Abdulhadi Al-JanabiAbstractA passively Q-switched erbium-doped fiber laser (EDFL) operating at 1560 nm is demonstrated by using a copper oxide (CuO) film as a saturable absorber (SA). The SA was prepared by embedding CuO nanoparticles (NPs) into a polyvinyl alcohol (PVA) by solution casting method. The CuO-SA has a modulation depth of 3.5% and a saturation intensity of 3.3 MW/cm2. By incorporating the CuO-SA into the laser cavity, stable Q-switched pulses were achieved at...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Homotopy perturbation method for nonlinear oscillators with coordinate-dependent mass
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Yue Wu, Ji-Huan HeAbstractNonlinear oscillators with no linear term or negative linear term are difficult to be solved analytically. This paper shows that the homotopy perturbation method can be effectively applied to such kinds of nonlinear oscillator by the parameter expansion technology. A nonlinear oscillator with coordinate-dependent mass is used as an example to elucidate the effectiveness and convenience of the method. The condition for periodic solution is obtained. (Source: Results in Physics)
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Fractal calculus and its geometrical explanation
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Ji-Huan HeAbstractFractal calculus is very simple but extremely effective to deal with phenomena in hierarchical or porous media. Its operation is almost same with that by the advanced calculus, making it much accessible to all non-mathematicians. This paper begins with the basic concept of fractal gradient of temperature, i.e., the temperature change between two points in a fractal medium, to reveal the basic properties of fractal calculus. The fractal velocity and fractal material derivative are then introduced to deduce laws for fluid mechan...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Ion polishing as a method of imaging the magnetic structures in CoNiGa monocrystal
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Andrzej Żak, Amadeusz Łaszcz, Mariusz Hasiak, Gregory Gerstein, Hans Jürgen Maier, Wlodzimierz DudzinskiAbstractMagnetic domain structure of magnetic shape memory alloy was observed using backscattered electron detector in scanning electron microscope and using Fresnel imaging in transmission electron microscope. The sample subjected to additional ion polishing allowed observation of the contrast associated with the magnetic structure of the material under conditions that exclude the use of Foucault or Fresnel transmission electron micro...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Structure and transport properties of Tl2Te3 single crystals
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): I.M. Ashraf, A. Salem, M.S. Awad Al-JumanAbstractA special new design from melt based on the Bridgman technique has been applied to prepare Tl2Te3 single crystals. The grown crystals were characterized by XRD, SEM, EDAX. The electrical conductivity, Hall effect and thermoelectric power have been performed over the temperature ranges from 93 K to 448 K and 129 K to 468 K respectively. Many physical constant (such as the energy gap, the depth of the impurity level, the Hall coefficient, the conductivity type, the diffusion length, the dif...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Computation of ion exchange buried microring resonator waveguide for THz communication applications
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Iraj S. Amiri, F. Alizadeh, M.M. Ariannejad, R. Amini, P. YupapinAbstractThe ion exchange creates the optical buried waveguides, whereas it is the method that the glass doping occurs with the condition of existence of the mobile metal ions. The most common ion used is silver (Ag+) due to its broad variation in the refractive index. The proposed application presented in this work is to use the microring resonator (MRR) system based on the buried waveguides simulated by the ion exchange method. The passive MRRs are realized as the multi-wavelengt...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Experimental studies on inhibition of mild steel corrosion by novel synthesized inhibitor complemented with quantum chemical calculations
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Taghried A. Salman, Khalida F. Al-Azawi, Iman Mahdi Mohammed, Shaimaa B. Al-Baghdadi, Ahmed A. Al-Amiery, Tayser Sumer Gaaz, Abdul Amir H. KadhumAbstractOne of best method, which was used to prevent the mild steel from corrosion, was through employed natural or synthetic organic chemical compounds. Here in, we displayed a Schiff base derivative which has nitrogen, oxygen and sulfur atoms as corrosion inhibitor for MS “mild steel” in 1 M HCl “hydrochloric acid” solution. Synthesized inhibitor was characterized by using ...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

The Sine-Gordon solitons in nematic liquid crystals under the external electric field
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Yan Li, Xiaobo Lu, Chunfeng HouAbstractIn this paper, we study the dynamic equation of molecular motion in nematic liquid crystals when there exists the twisting disturbance of the molecular arrangement under the external electric field. After a series of derivation, we find that the evolution equation satisfies the form of Sine-Gordon equation which indicates that the molecular twisting deformation may propagate in the form of solitary waves under external electric field, and the kink and anti-kink Sine-Gordon solitary solutions are given then...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Quality factor investigation by using trapezoidal subwavelength grating waveguide micro-ring resonator based on graphene
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Elnaz Akbari, Gholamreza Mosallanezhad, M.M. Ariannejad, P. Yupapin, Abdolkarim AfroozehAbstractSub-wavelength grating waveguide-based micro-ring resonators (SWGMRs) are interesting areas of photonics and optoelectronics application. The nature of high bending loss has constrained the SWGRM to achieve a small radius with the satisfied quality factor. In this work, we have demonstrated that the bend loss in SWG waveguide has been substantially reduced by using optimized trapezoidal silicon pillars as compared to rectangular silicon pillars (conv...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Studies of Ag/TiO2 plasmonics structures integrated in side polished optical fiber used as humidity sensor
In this report, we investigate the effects of Ag/TiO2 integrated in side polished optical fiber. Several layers of Ag thickness has been deposited on glass substrates using electron beam (e-beam) evaporation technique in order to determinate the influence of silver with combination of TiO2 on final properties of the sensor. Several thicknesses of Ag NPs were sets to 5 nm, 7 nm, 12 nm, and 16 nm. Another layer of metal oxide, specifically titanium oxide (TiO2) is introduced, covering the Ag layer to study the effect of metal oxides toward the performance of the device. The morphology of the samples was observed usin...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Luminescent characteristics of Dy3+-doped polymethyl methacrylates for white light-emitting diode
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Xiaobin Ren, Chenhguo MingAbstractTo explore white-light-emitting materials, a series of Dy3+-doped polymethyl methacrylate (PMMA) samples are prepared by polymerization method. Excitation spectra and emission spectra are experimentally investigated. It is found that the luminous color of the PMMA sample doped with 0.1 mol% Dy3+ ion is white to the naked eye under 326 nm excitation. The CIE chromaticity coordinates (X = 0.321, Y = 0.336) of the emission are close to the standard white-light illumination (0.333, 0.333). The results a...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

A Monte Carlo study of arms effect in myocardial perfusion of normal and abnormal cases utilizing STL heart shape
This study is adopting this recent improvement in GATE to study arms effect in SPECT imaging with the consideration of four scenarios; normal heart perfusion imaging with and without arms positioned next to the patient and two of the same scenarios with a perfusion myocardial defected. The results showed that perfusion defect could be observed with arms next to the patient. For image reconstruction, both filtered backprojection (FBP) and iterative technique – maximum likelihood expectation maximization (MLEM) were used. The MLEM was performed to analyse the four different patient scenarios. The difference in counts b...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Optoelectronic properties of the InSe/Ga2S3 interfaces
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Najla M. Khusayfan, Hazem K. KhanfarAbstractIn this work, the nature of formation, the structural, optical and optoelectronic properties of the InSe/Ga2S3 interfaces are explored by the Scanning electron microscopy, energy dispersive X-ray, X-ray diffraction, optical spectrophotometry and temperature dependent dark and photoconductivity. The InSe/Ga2S3 interfaces that are prepared by the vapor deposition technique are observed to exhibit a physical nature of stacking with correct atomic stoichiometry of the layers. The deposition of the Ga2S3 o...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Microstructure and wear behaviour of Ni-based alloy coated onto grey cast iron using a multi-step induction cladding process
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Jing Yu, Bo Song, Yanchuan LiuAbstractThe purpose of this work was to develop an innovative approach to remanufacturing grey cast iron cylinder liners. Ni-based alloy coatings were fabricated on HT 300 cast iron substrates using a multi-step induction cladding technique. Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDS) and X-ray Diffraction (XRD) were employed to analyse the microstructure, elemental distribution and phase composition of the coating. The results indicated that the coatings were metallurgically bond...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Preliminary study of total variation noise reduction algorithm with high-energy industrial X-ray imaging system in nondestructive testing field
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Heemoon Cho, Youngjin LeeAbstractOver the past years, many studies have evaluated the performance of nondestructive testing high-energy X-ray imaging methods. In these high-energy industrial X-ray imaging systems, the noise is very important when accurately assessing the nondestructive analysis of faults inside the object volume. A common way to improve the noise performance is the total variation (TV) noise reduction algorithm. Thus, the purpose of this study is to establish a high-energy industrial X-ray imaging system using 450 kVp energy ...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Time-temperature-transformation diagrams for crystallization of the oxyfluoride glass system
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): M. Soleymani Zarabad, M. RezvaniAbstractIsothermal crystallization studies were performed on the glass 37.26SiO2-28.11Al2O3-7.73CaO-26.89CaF2-4.5K2O (wt%) in the crystallization region between the glass transition (Tg) and end of crystallization temperature (Tf), resulting in a time-temperature-transformation (T.T.T.) diagram for crystallization. The crystallized fraction calculated by “Ohlberg-Strickler” method. By fitting Avrami curves on experimental data kinetic properties of isothermal crystallization of CaF2 has been determine...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Strengthening of mechanical and tribological properties of Al-4.5%Cu matrix alloy with the addition of bamboo leaf ash
The objective of this research paper is to introduce an economically identified bamboo leaf ash, extruded from agro waste as effective reinforcement in the development of Aluminium alloy based composite. In the current study, stir casting process was used to fabricate composites by introducing 0, 2, 4 and 6 wt% of bamboo leaf ash into Al-4.5%Cu matrix. The fabricated composites were characterized using optical microscopy, SEM with EDAX, XRD, density, hardness, tensile testing and dry sliding wear tests. It has been observed that the bamboo leaf ash particles were uniformly distributed throughout the matrix. The density o...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Nanoscale GaP strips based photonic crystal fiber with high nonlinearity and high numerical aperture for laser applications
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Bikash Kumar Paul, Md. Golam Moctader, Kawsar Ahmed, Md. Abdul KhalekAbstractA novel design of circular hybrid photonic crystal fiber (CH-PCF) with highly nonlinearity and high numerical aperture (NA) is introduced in this paper. The numerical simulation results are obtained by employing the finite element method (FEM) and selecting finer mesh. The investigated parameters are nonlinearity, effective area, scattering loss, power fraction and NA for the two fundamental polarized modes. Significant improvement of PCFs in terms of the non-linearity...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Heat transfer analysis of Prandtl liquid nanofluid in the presence of homogeneous-heterogeneous reactions
The objective of present research work is to analyze the homogeneous-heterogeneous reactions on the MHD two-dimensional stagnation-point flow of non-Newtonian Prandtl fluid flow and heat transfer towards horizontal linear stretching sheet. The governing boundary layer equations using similarity transformation are reduced to ordinary differential equations suitable to be solved using Finite Difference Method. The quantities of interests are thoroughly analyzed under the effects of various emerging parameters. Comparison of the results obtained from limiting case of present model with already existing literature is in good a...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Analytical solutions of photo-thermo-elastic waves in a non-homogenous semiconducting material
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Aatef Hobiny, Ibrahim A. AbbasAbstractIn the present paper, the wave propagation on non-homogenous semiconductor through photo-thermal process has been studied by using the theory of coupled plasma and thermoelastic wave. Without neglecting the coupling between the plasma and thermoelastic wave that photo-generated through intensity modulated laser beam and tightly focused, a semiconducting isotropic elastic medium has non-homogeneity in thermal and elastic properties are considered. The analytical solutions in the domain of Laplace by the eige...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Second harmonic generation in two different arrangement of type I collagen on nonlinear microscopy
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Ying Chen, Guobao Jiang, Yuan Zhou, Xu XiaAbstractSecond harmonic generation (SHG) microscopy has emerged as a powerful tool for biomedical research, especially in fibrosis-related disease studies. In this letter, two different arrangement models were established to compare SHG in type I collage, which is a major risk factor for fibrotic diseases. Different models result in distinct SHG intensity curves, which are functions of polarization angle. Based on those models, the influences of different scatters array and incident polarization on SHG ...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Analysis of heat transfer in nanofluid past a convectively heated permeable stretching/shrinking sheet with regression and stability analyses
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Shah Jahan, Hamzah Sakidin, Roslinda Nazar, Ioan PopAbstractIn this article, we study the revised model of boundary-layer flow past a permeable stretching/shrinking sheet over the heated surface in a nanofluid with stability and regression analyses. The revised model refers to a physically more realistic approach, where the nanoparticle fraction can be controlled on the boundary in a similar way as for temperature on the boundary. The system of nonlinear similarity ordinary differential equations is solved numerically and dual solutions are fou...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Eigen solutions of the Schrӧdinger equation and the thermodynamic stability of the black hole temperature
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): C.A. Onate, J.O. Okoro, O. Adebimpe, A.F. LukmanAbstractThe approximate analytical solutions of the Schrӧdinger equation for Eckart potential is obtained via supersymmetry shape invariance approach. The energy equation and the corresponding wave function are obtained in a closed and compact form. The wave function was used to calculate the Rényi entropy. The results of the Rényi entropy was used to study the mass energy parameter, temperature and heat capacity of the black hole. From the results obtained, the temperature of the b...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

An acoustic modeling of the three-dimensional annular segment cavity with various impedance boundary conditions
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Yujie Xiao, Dong Shao, Hong Zhang, Cijun Shuai, Qingshan WangAbstractA three-dimensional Fourier series method (3D-FSM) is applied to study the acoustic characteristics of annular segment acoustic cavity with various impedance boundary conditions. The formulation is constructed to describe the cavity system based on the energy principle. Under the framework of this paper, the admissible sound pressure function is generally set, regardless of boundary conditions, to a 3D Fourier cosine series and six supplementary functions. These supplementary ...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Fabrication and comparative study of magnetic Fe and α-Fe2O3 nanoparticles dispersed hybrid polymer (PVA + Chitosan) novel nanocomposite film
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Md. Asadul Hoque, M.R. Ahmed, G.T. Rahman, M.T. Rahman, M.A. Islam, Mubarak A. Khan, M. Khalid HossainAbstractIncorporation of nanoparticles into polymer matrix allows the development of new features that differs from the pure materials. In this research, magnetic nanoparticles reinforced organic biodegradable polymer matrix based biocompatible nanocomposite films were fabricated. This work covered, synthesis of Iron (Fe) and Iron oxide (α-Fe2O3) nanoparticles by chemical reduction and sol-gel method respectively, fabrication of Fe/Polyvi...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Fluctuations in strongly correlated electron systems
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Mu-Kun Lee, Tsung-Sheng Huang, Chyh-Hong ChernAbstractHigh transition temperature superconductors in cuprates exhibit the charge-density-wave fluctuations and the ferromagnetic time-reversal-symmetry-breaking fluctuation in the polar Kerr rotation experiments. We demonstrate that they share the same root of origin, and the underlying mechanism also leads to the pseudogap formation. The pseudogap formation, the charge-density-wave fluctuation, and the time-reversal-symmetry-breaking fluctuation are the consequent phenomena of the correlation. Th...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

First-principles study of elastic, electronic, thermodynamic, and thermoelectric transport properties of TaCoSn
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Enamul Haque, M. Anwar HossainAbstractIn this paper, we have performed a comprehensive set of first-principles calculations to study elastic, electronic, thermodynamic and thermoelectric properties of TaCoSn using density functional theory (DFT). Half-heusler, TaCoSn has been found to be elastically and thermodynamically stable, ductile and hard material. The Debye temperature of TaCoSn has been found to be 375.39 K. The calculated energy bands indicate that TaCoSn is an indirect band gap semiconductor and the value of gap is 1.107 eV using...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Reduction in the band gap of anodic TiO2 nanotube arrays by H2 plasma treatment
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Negin Pishkar, Zahra Jedi-soltanabadi, Mahmood GhorannevissAbstractInfluence of the hydrogen (H2) plasma treatment on the anodic titanium dioxide (TiO2) nanotubes physical properties was studied. The Titanium substrates were anodized in an ethylene-glycol-based electrolyte solution containing 0.3 wt% ammonium fluoride (NH4F) and 3 vol% deionized (DI) water at a potential of 50 V for 1 h at room temperature. The TiO2 nanotubes arrays hold a great potential as the electrode materials for high-performance electrochemical applications. Howe...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Plane symmetric modified holographic Ricci dark energy model in Saez-Ballester theory of gravitation
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): V.U.M. Rao, U.Y. Divya Prasanthi, Y. AdityaAbstractThe present work is devoted to investigation of non-static plane symmetric universe filled with matter and anisotropic modified holographic Ricci dark energy components within the framework of a scalar-tensor theory formulated by Saez and Ballester (1986). To get the determinate solution of the model we have used scalar expansion proportional to the shear scalar, linearly varying deceleration parameter and energy density of modified holographic Ricci dark energy. We study the equation of st...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Effect of annealing on microstructure and properties of Er modified 5052 alloy
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Jinlian Wang, Jun Xu, Feng PanAbstractMicrostructure of 5052 + Er alloy at continuous casting, hot-rolled, cold-rolled and annealed state were observed, studied the effect of annealing on the microstructure, mechanical properties and forming properties of the alloy, and explored the mechanism of its action. The results showed that, when the annealing temperature is between 340 °C and 360 °C, the tensile strength and yield strength of the 5052 + Er alloy have a large decline while the elongation increase obviously; The recrys...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Stability and motion around equilibrium points in the rotating plane-symmetric potential field
This study presents a study of equilibrium points, periodic orbits, stabilities, and manifolds in a rotating plane-symmetric potential field. It has been found that the dynamical behaviour near equilibrium points is completely determined by the structure of the submanifolds and subspaces. The non-degenerate equilibrium points are classified into twelve cases. The necessary and sufficient conditions for linearly stable, non-resonant unstable and resonant equilibrium points are established. Furthermore, the results show that a resonant equilibrium point is a Hopf bifurcation point. In addition, if the rotating speed changes,...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

Three dimensional third grade nanofluid flow in a rotating system between parallel plates with Brownian motion and thermophoresis effects
Publication date: September 2018Source: Results in Physics, Volume 10Author(s): Zahir Shah, Taza Gul, Saeed Islam, Muhammad Altaf Khan, Ebenezer Bonyah, Fawad Hussain, Safyan Mukhtar, Murad UllahAbstractThe heat and mass transmission effects of non-Newtonian electrically conducting nanofluid flows, considering (third grad fluid) between two parallel plates with rotating system has been analyzed. The problem is demonstrated in such a way that the upper plate is static and the lower plate is stretched. The nanofluid flows of third grade fluid under the influence of thermophoresis and Brownian motion in a rotating system is t...
Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research

A Solid Polymer Electrolyte for Aluminum Ion Conduction
This study establishes a polymer system and synthetic route towards solid polymer electrolytes for aluminum ion conduction, for the development of all solid-state aluminum ion batteries. (Source: Results in Physics)
Source: Results in Physics - July 9, 2018 Category: Physics Source Type: research

Second law of thermodynamics is ingrained within quantum mechanics
Publication date: Available online 7 July 2018Source: Results in PhysicsAuthor(s): Tolga Yarman, Alexander Kholmetskii, Ozan Yarman, Metin ArikAbstractWe show that the second law of thermodynamics is rooted in quantum mechanics, inasmuch as allowing the substitution of the Boltzmann constant k and temperature with respectively the Planck constant and quantum numbers. In particular, we will see that the entropy S becomes proportional to the natural logarithm of the average of the squared quantum numbers n¯2, where each quantum number is associated with a quantum state of the constituents of the thermodynamical system u...
Source: Results in Physics - July 7, 2018 Category: Physics Source Type: research

Investigating the effect of sputtering conditions on the physical properties of aluminum thin film and the resulting alumina template
Publication date: June 2018Source: Results in Physics, Volume 9Author(s): Shabnam Taheriniya, Sara Sadat Parhizgar, Amir Hossein SariAbstractTo study the alumina template pore size distribution as a function of Al thin film grain size distribution, porous alumina templates were prepared by anodizing sputtered aluminum thin films. To control the grain size the aluminum samples were sputtered with the rate of 0.5, 1 and 2 Å/s and the substrate temperature was either 25, 75 or 125 °C. All samples were anodized for 120 s in 1 M sulfuric acid solution kept at 1 °C while a 15 V potential was being appli...
Source: Results in Physics - July 5, 2018 Category: Physics Source Type: research

A semi-analytical analysis of electro-thermo-hydrodynamic stability in dielectric nanofluids using Buongiorno’s mathematical model together with more realistic boundary conditions
Publication date: June 2018Source: Results in Physics, Volume 9Author(s): Abderrahim Wakif, Zoubair Boulahia, Rachid SehaquiAbstractThe main aim of the present analysis is to examine the electroconvection phenomenon that takes place in a dielectric nanofluid under the influence of a perpendicularly applied alternating electric field. In this investigation, we assume that the nanofluid has a Newtonian rheological behavior and verifies the Buongiorno’s mathematical model, in which the effects of thermophoretic and Brownian diffusions are incorporated explicitly in the governing equations. Moreover, the nanofluid layer ...
Source: Results in Physics - July 5, 2018 Category: Physics Source Type: research

Numerical prediction of the energy efficiency of the three-dimensional fish school using the discretized Adomian decomposition method
Publication date: June 2018Source: Results in Physics, Volume 9Author(s): Yinwei LinAbstractA three-dimensional modeling of fish school performed by a modified Adomian decomposition method (ADM) discretized by the finite difference method is proposed. To our knowledge, few studies of the fish school are documented due to expensive cost of numerical computing and tedious three-dimensional data analysis. Here, we propose a simple model replied on the Adomian decomposition method to estimate the efficiency of energy saving of the flow motion of the fish school. First, the analytic solutions of Navier-Stokes equations are used...
Source: Results in Physics - July 5, 2018 Category: Physics Source Type: research

Liquid crystal based optical platform for the detection of Pb2+ ions using NiFe2O4 nanoparticles
Publication date: June 2018Source: Results in Physics, Volume 9Author(s): Saman Zehra, Iftikhar Hussain Gul, Zakir HussainAbstractA simple, sensitive, selective and real time detection protocol was developed for Pb2+ ions in water using liquid crystals (LCs). In this method, NiFe2O4 nanoparticles were synthesized using chemical co-precipitation method. Crystallite size, morphological, functional groups and magnetization studies were confirmed using X-ray diffraction, Scanning Electron Microscopy, and Fourier transform infrared spectroscopy techniques, respectively. The nanoparticles were mono dispersed with average particl...
Source: Results in Physics - July 5, 2018 Category: Physics Source Type: research

Chaotic Darcy-Brinkman convection in a fluid saturated porous layer subjected to gravity modulation
Publication date: June 2018Source: Results in Physics, Volume 9Author(s): Moli Zhao, Shaowei Wang, S.C. Li, Q.Y. Zhang, U.S. MahabaleshwarAbstractOn the basis of Darcy-Brinkman model, the chaotic convection in a couple stress fluid saturated porous media under gravity modulation is investigated using the nonlinear stability analyses. The transition from steady convection to chaos is analysed with the effect of Darcy-Brinkman couple stress parameter and the gravity modulation. The results show that the chaotic behavior is connected with the critical value of Rayleigh number which is dependent upon the oscillation frequency ...
Source: Results in Physics - July 5, 2018 Category: Physics Source Type: research

Experimental and quantum chemical studies of functionalized tetrahydropyridines as corrosion inhibitors for mild steel in 1 M hydrochloric acid
Publication date: June 2018Source: Results in Physics, Volume 9Author(s): Jiyaul Haque, Chandrabhan Verma, Vandana Srivastava, M.A. Quraishi, Eno E. EbensoAbstractCorrosion inhibition property of ethyl 1,2,6-triphenyl-4-(phenylamino)-1,2,5,6-tetrahydropyridine-3-carboxylate (THP-1) and ethyl 2,6-bis(4-methoxyphenyl)-1-phenyl-4-(phenylamino)-1,2,5,6-tetrahydropyridine-3-carboxylate (THP-2) on mild steel (MS) in 1 M HCl have been studied using weight loss, electrochemical, surface morphology (SEM, AFM) and quantum chemical (QC) calculations methods. Results showed that both the functionalized tetrahydropyridines act as an ...
Source: Results in Physics - July 5, 2018 Category: Physics Source Type: research

New exact travelling wave solutions for space-time fractional nonlinear equations describing nonlinear transmission lines
Publication date: June 2018Source: Results in Physics, Volume 9Author(s): M.A. Abdou, A.A. SolimanAbstractIn this paper, we examines the effectiveness of newly developed algorithms called the exp(-ϕ(ξ))-expansion function method and generalized Kudryashov method for constructing new and important travelling wave solutions of space-time fractional nonlinear differential equations. The fractional differential equation is converted into ordinary differential equations with the help of fractional complex transform and the modified Riemann Liouville derivative sense. The validity and reliability the proposed methods are tes...
Source: Results in Physics - July 5, 2018 Category: Physics Source Type: research