Mechanical properties and corrosion behavior of copper based hybrid composites synthesized by stir casting
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Manvandra Kumar Singh, Rakesh Kumar Gautam, Gopal JiAbstractIn this work, we are reporting development of copper – highly strained stainless steel (HSSS) – tungsten carbide (WC) hybrid composites as well as their mechanical behavior and corrosion resistant properties (0.1 M NaCl). Three types of Cu-HSSS-WC hybrid composites, having different quantity of HSSS (A1-1%, A2-2% and A4-4%), are prepared by stir casting and shaped in strip form. These strips are characterized by X-ray diffraction, scanning electron microscopy and energy disper...
Source: Results in Physics - May 18, 2019 Category: Physics Source Type: research

Investigation of humping defect formation in a lap joint at a high-speed hybrid laser-GMA welding
In this study, an investigation on a lap joint welding using a hybrid Laser-GMAW (L-GMAW) welding process on a carbon steel sheet was undertaken to examine the mechanisms involved in the arc behavior, the droplet transfer, and the weld pool flow dynamics in a hump defect formation at high-speed welding. A variation of the process parameters in the hybrid welding system such as the wire feed speed (WFS), the traveling speed (TS) and the oscillation of the laser beam were used as input signals. A high-speed video camera was used with different viewing positions to capture the sequence of events during the hybrid welding proc...
Source: Results in Physics - May 18, 2019 Category: Physics Source Type: research

Constitutive modelling and microscopic analysis of TC4 alloy sheet at elevated temperature
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Hui Wang, Kongxun Zhao, Xingrong Chu, Bing Zhao, Jun GaoAbstractTensile tests of TC4 alloy sheet were performed at elevated temperatures to explore the deformation behaviors under different conditions. The deformation conditions were determined by four temperatures 600 °C, 650 °C, 700 °C and 750 °C, and each temperature corresponds to four strain rates (i.e. 0.005 s−1, 0.01 s−1, 0.05 s−1 and 0.1 s−1), respectively. Based on the obtained deformation behaviors, two constitutive models were establ...
Source: Results in Physics - May 18, 2019 Category: Physics Source Type: research

Electromagnetic wave propagation in a superconducting parallel-plate waveguide filled with an indefinite medium
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Burhan Zamir, Rashid Ali, Muzaffar BashirAbstractThe electromagnetic wave propagation is analysed in a superconducting parallel-plate waveguide filled with an indefinite medium. The dispersion relations of transverse electric and transverse magnetic wave modes are derived by using the Meissner boundary conditions. The different cases of these wave modes are discussed by choosing the appropriate signs of the anisotropic parameters of the indefinite medium. In this connection, the regions of propagation/non-propagation are numerically analysed by plot...
Source: Results in Physics - May 18, 2019 Category: Physics Source Type: research

Electronic structure and optical properties of Cd co-doped wurtizte GaN exposed from first principles study
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): M.H. EisaAbstractWe have diligently studied the impact of cadmium (Cd) co-doping on electronic structure, the thickness of states and optical properties of wurtzite gallium nitride (GaN) inside the casing work of first rule thickness useful hypothesis (density functional theory (DFT)). From the electronic structure of single and twofold Cd-doped GaN, it is discovered that Cd-doped GaN is a run of the mill coordinate band hole semiconductor. Be that as it may, d orbitals of Cd are powerful hybridized with the p orbitals of N close to the Fermi level,...
Source: Results in Physics - May 16, 2019 Category: Physics Source Type: research

Effect of boron concentration on hot deformation behavior of stainless steel
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): A.Y. Churyumov, A.V. Pozdniakov, B. Mondoloni, A.S. ProsviryakovAbstractSteels with high boron content are important materials to produce spent nuclear fuel storage. The large volume fraction of brittle borides in the high boron steel microstructure makes it very hard and not easily deformable. Preliminary investigation and simulation of the hot deformation behavior is a necessary step for the development of industrial forming technologies. Hot compression tests of high boron steels with 2.05 and 3.15 wt% of boron, respectively were performed in t...
Source: Results in Physics - May 16, 2019 Category: Physics Source Type: research

Kinetic Monte Carlo simulation of sintering behavior of additively manufactured stainless steel powder particles using reconstructed microstructures from synchrotron X-ray microtomography
In this study, the sintering behavior of additively manufactured stainless steel powder particles is simulated using a three-dimensional kinetic Monte Carlo (kMC) model. The initial microstructure of powder particles is reconstructed using micro-CT images from the Argonne National Laboratory’s synchrotron X-ray microtomography facility. Using the model, the sintering characteristics of the powder, including its relative density, neck growth, and grain coarsening, are quantitatively analyzed. Sintering temperature directly affects the rate of densification and grain growth and coarsening. Higher temperature results in...
Source: Results in Physics - May 16, 2019 Category: Physics Source Type: research

A novel approach for constructing kinetic energy operators with position dependent mass
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Y. Chargui, A. Dhahbi, A. TrabelsiAbstractThe interest in physical systems with position-dependent mass (PDM) is always topical. In this work we present a new way to construct kinetic energy operators (KEO’s) for particles endowed with a position varying mass within the Schrödinger equation. Taking recent developments of non-Hermitian quantum mechanics into account, we start with a non-Hermitian Hamiltonian and we recall that it is quasi-Hermitian and can be always associated to a Hermitian partner. The latter is then used along with the ...
Source: Results in Physics - May 16, 2019 Category: Physics Source Type: research

Increase of metallic silver nanoparticles in Chitosan:AgNt based polymer electrolytes incorporated with alumina filler
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Shujahadeen B. Aziz, M.A. Brza, Pshko A. Mohamed, M.F.Z. Kadir, M.H. Hamsan, Rebar T. Abdulwahid, H.J. WooAbstractIn the present work, the possibility of increasing the amount of metallic silver particles in chitosan (CS)-based polymer nano-composites was discussed. To prepare the electrolyte, a fixed amount of silver nitrate (AgNO3) inorganic salt was added to the natural CS biopolymer. Various techniques, such as UV–vis, SEM, EDX and impedance spectroscopy, were used to characterise the samples. Remarkable enhanced surface plasmonic resonanc...
Source: Results in Physics - May 16, 2019 Category: Physics Source Type: research

Preparation and microwave absorption properties of ZnFe2O4/polyaniline/graphene oxide composite
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Yue Qiao, Junping Xiao, Qi Jia, Liying Lu, Huili FanAbstractIn this work, a new kind of ternary composite (ZnFe2O4(cube)/Polyaniline/Graphene oxide composite) with good absorbing property was prepared by a simple in-situ polymerization. The chemical composition and morphology of ZnFe2O4 and composite were characterized by FT-IR, XRD, XPS, SEM. The electromagnetic absorption property of composite was investigated by means of vector network analyzer. The results indicated that the dielectric loss of ternary composite was dominated by the Debye dipolar...
Source: Results in Physics - May 16, 2019 Category: Physics Source Type: research

Analysis of harmonic generation in planar and elliptic bi-harmonic undulators and FELs
We present a phenomenological model for single-pass FEL radiation power and bunching evolution in planar and elliptic undulators with two polarizations of the emitted radiation; the models allows for the suppression of low harmonics in the spectrum. We study the harmonic generation in some planar and elliptic undulators with account for the off-axis effects and for the 3rd harmonics of the undulator magnetic field. Both spontaneous and stimulated types of radiation are studied. Spontaneous UR is studied with generalized Bessel functions formalism. The analytical FEL model, which employs these Bessel functions, is verified ...
Source: Results in Physics - May 15, 2019 Category: Physics Source Type: research

The gradient structure in the surface layer of an Al-Zn-Mg-Cu alloy subjected to sliding friction treatment
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): G.Y. Zheng, X. Luo, Y.Q. Yang, Z.D. Kou, B. Huang, Y.S. Zhang, W. ZhangAbstractA surface gradient structure can be obtained by sliding friction treatment (SFT). This work studied the effects of SFT parameters on the microstructure evolution in the surface layer of a 7475-T7351 Al alloy. The results show that both applied load and cycle number are conducive to the surface deformation, but the former is more pronounced. Based on transmission electron microscopy (TEM) analyses, grain refinement process induced by SFT treated at a load of 300 N for 20...
Source: Results in Physics - May 15, 2019 Category: Physics Source Type: research

Selectively toluene-filled photonic crystal fiber Sagnac interferometer with high sensitivity for temperature sensing applications
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Yashar E. Monfared, C. Liang, R. Khosravi, B. Kacerovska, S. YangAbstractIn this paper, we theoretically and numerically investigate toluene-filled polarization maintaining photonic crystal fibers (PMPCFs) for temperature sensing application via Sagnac interferometer. We designed a PMPCF with a birefringence of 8.68 × 10−5, a relative birefringence sensitivity of 26% for 5 °C variation and sensitivity of −11 nm/°C around 25 °C. We study the effects of hole dimensions and fabrication imperfections on the perfor...
Source: Results in Physics - May 15, 2019 Category: Physics Source Type: research

New metrics for the gravitational field of a point mass
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): V.A. GolovkoAbstractThe equations of general relativity for empty space are revisited in order to find metrics satisfying physically judicious requirements that the components of the metric tensor should never change their signs so that the relevant systems of reference could be realized with the aid of real bodies throughout all space. The Schwarzschild metric does not comply with the requirements; besides, the choice of this metric is not founded physically. It is demonstrated that there are an infinite number of metrics satisfying all the require...
Source: Results in Physics - May 15, 2019 Category: Physics Source Type: research

Enhanced light absorption in the organic thin films by coating cross-shaped metamaterial resonators onto the active layers
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Yadgar I. Abdulkarim, Lianwen Deng, Fahmi F. Muhammad, Longhui HeAbstractCross-shaped resonators were proposed to improve the light absorption in the organic active layers, namely P3HT, PCBM and P3HT:PCBM hetero-structure. The resonator was made of aluminium (Al) which was encrusted on top of the organic active layers backed with indium tin oxide (ITO) coated glass. Simulated results showed that the proposed structure had significantly enhanced the light absorption in the organic thin films, whereby exhibited a broadband absorption in the visible an...
Source: Results in Physics - May 15, 2019 Category: Physics Source Type: research

Highly sensitive open-channels based plasmonic biosensor in visible to near-infrared wavelength
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Sanjida Akter, S.M. Abdur RazzakAbstractIn this paper, we numerically demonstrate a low-cost plasmonic refractive index sensor using two-sided open-channels that can operate in both visible and near-infrared region. Widely used finite element method (FEM) software is employed to characterize the sensing properties. A thin coating of gold layer is used inside the open channels of the photonic crystal fiber (PCF) to create the plasmons. It is reported that the highest wavelength sensitivity of 5000 nm/RIU with a sensor resolution of 2.0 × ...
Source: Results in Physics - May 12, 2019 Category: Physics Source Type: research

Evolutions of geometry and electronic state introduced by oxygen vacancy for CaMnO3 compound
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): C.S. Huang, H. Fang, Z.H. Xu, X. Zheng, X.X. RuanAbstractThe cell structures, locally micro-structures, combinations, electronic states as well as carrier transports induced by Oxygen vacancy for the CaMnO3 compound have been systematically investigated by pseudo-potential plane wave functions within the framework of density functional theory calculational method. The results reveal that the Oxygen vacant CaMnO2.75 has larger formation enthalpy than that of the intrinsic CaMnO3 and the Oxygen vacancy formation energy of CaMnO3 is as large as 7.10 ...
Source: Results in Physics - May 12, 2019 Category: Physics Source Type: research

Synthesis route dependent characterizations of CaMgP2O7: Gd3+ phosphor
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): R.G. Kunghatkar, Vijay L. Barai, S.J. DhobleAbstractGd3+ activated CaMgP2O7 were successfully synthesized by different synthesis route namely; the solid-state reaction method, the sol-gel method, wet chemical, and solution combustion method. The prepared samples were characterized by several characterization techniques like XRD, SEM, FT-IR, EPR, and PL. CaMgP2O7 has a monoclinic crystal structure. The effective g value geff ≈ 5.88, 2.88, and 1.91 were observed in CaMgP2O7: Gd3+. PL excitation at 274 nm and emission at 314 nm indicates ...
Source: Results in Physics - May 12, 2019 Category: Physics Source Type: research

Electrical investigation of Al/PEDOT/C/p-Si structure
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Fikriye Seyma Kaya, Tuba Oznuluer Ozer, Guven Turgut, Ayse Bayrakceken Yurtcan, Songul DumanAbstractIn this investigation, Al/PEDOT/C/p-Si structure has been fabricated by synthesizing PEDOT/C composites on the p-Si substrate. The thickness and surface morphology of PEDOT/C on p-Si have been investigated by using the scanning electron microscope. The optical characterization of PEDOT/C solution indicated a strong optical absorbance peak located at 267 nm. The electrical characterization of Al/PEDOT/C/p-Si structure was made under dark and illumina...
Source: Results in Physics - May 11, 2019 Category: Physics Source Type: research

Sensitivity enhancement of surface plasmon resonance sensors with 2D franckeite nanosheets
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Shuaiwen Gan, Yuting Zhao, Xiaoyu Dai, Yuanjiang XiangAbstractAs a latest novel two-dimensional (2D) material with naturally occurring van der Waals heterostructure, franckeite has the unique advantages compared with the artificial stacking heterostructures. Herein, we propose a surface plasmon resonance (SPR) sensor with 2D franckeite nanosheets to improve the sensitivity. In this structure, franckeite is covered on the surface of 50 nm silver film, so that the SPR sensitivity is related to the thickness of the franckeite overlayer. The sensitivi...
Source: Results in Physics - May 11, 2019 Category: Physics Source Type: research

Lanthanum based quaternary Heusler alloys LaCoCrX (X = Al, Ga): Hunt for half-metallicity and high thermoelectric efficiency
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Srishti Singh, Dinesh C. GuptaAbstractAb-initio framework investigation of physical, structural stability, electro-magnetic, thermodynamic and transport behavior of quaternary La-based Heusler alloys carried out using spin-polarized calculations. The structural characterization in nonmagnetic, ferromagnetic and anti-ferromagnetic states reveal the ordered ferromagnetic LiMgPdSn-type structure as stable phase. The band structure profile show perfect half-metallic character with integral 3.00 µB magnetic moment according to the Slater-Pauling ru...
Source: Results in Physics - May 10, 2019 Category: Physics Source Type: research

Multi-functional terahertz metamaterial using symmetrical and asymmetrical electric split-ring resonator
We present the electromagnetic coupling effects in four types of electric split-ring resonators (eSRRs). These four designs of eSRRs are based on SRR tailored with single-, dual-, triple-, and quad-split, respectively. The near-field electromagnetic coupling responses indicate the resonance caused from the inductive-capacitive (LC) resonance between eSRRs. According to the patterns of eSRR are symmetrical or asymmetrical configurations, these eSRRs exhibit polarization-dependence, polarization-independence, resonant frequency shifting, resonant intensity modulation, and resonant switching characteristics, respectively. To ...
Source: Results in Physics - May 10, 2019 Category: Physics Source Type: research

Exploring the effect of oligocene elongation on photovoltaic, optoelectronic and charge transfer properties in TPA dyes tethered to the semiconductor surface
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Ahmad IrfanAbstractA series of metal-free organic dyes (TPA1-TPA5) comprising triphenylamine as electron donor, cyanoacrylic acid as anchoring group and oligocenothiophene-pyrimidine as π-bridge linkers were molecularly engineered. By incorporation and elongation of oligocene spacer between donor and acceptor, electronic structures, photovoltaic and optoelectronic properties were tuned. Electronic and optical properties calculations of TPA dye upon adsorbing onto Ti3O6H and Ti6O12H were performed systematically. The charge transfer from occupied ...
Source: Results in Physics - May 10, 2019 Category: Physics Source Type: research

One through the other tunneling of the “kink” – Type solitons in domain wall of ferromagnetic film
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): A.B. Shevchenko, M.Yu. BarabashAbstractThe sub-barrier quantum passing through one another of length segments of two nanosized magnetic solitons (kink – type) in the form of unipolar vertical Bloch lines is considered. Solitons located in a domain wall of a magnetic stripe domain formed in a uniaxial ferromagnetic film. It is shown that this effect occurs due to the quantum oscillations of vertical Bloch lines excited by an external magnetic field at subhelium temperatures. It has been established that tunneling of “whole” Bloch li...
Source: Results in Physics - May 9, 2019 Category: Physics Source Type: research

The classification of single traveling wave solutions to coupled time-fractional KdV-Drinfel’d-Sokolov-Wilson system
This article aims to carry out novel research on obtaining exact solutions to a generalized time-fractional KdV-Drinfel’d-Sokolov-Wilson system. The complete discrimination system for polynomial method is applied to handle such a problem. Description of the method is given and all the possible exact traveling wave solutions including hyper-elliptic functions solutions are obtained, which are very difficult to get by other methods. In particular, to show the existence of the solutions, concrete examples are constructed for the concrete parameters of the corresponding solutions, from which we can see that each kind of ...
Source: Results in Physics - May 9, 2019 Category: Physics Source Type: research

Dual-band, polarization-insensitive metamaterial perfect absorber based on monolayer graphene in the mid-infrared range
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Hailiang Li, Jiebin Niu, Guanya WangAbstractA dual-band, polarization-insensitive metamaterials (MMs) perfect absorber based on monolayer graphene in the mid-infrared range were designed and researched. By designing a simple structure, under the optimal geometric parameters of the proposed structure, we simulate a MMs perfect absorber, corresponding the two absorption peaks at wavelengths 48.49 μm and 65.33 μm with absorptivity 99.31% and 99.91%. Physical mechanisms of the MMs perfect absorber is investigated by the impedance matching theo...
Source: Results in Physics - May 9, 2019 Category: Physics Source Type: research

Light amplification without population inversion in one-dimensional photonic crystal doped by rare-earth ions
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Ahmad Kamkar, Mostafa Sahrai, Jafar B. Poursamad, Sohrab Ahmadi-KandjaniAbstractProbe field amplification without population inversion in a one-dimensional photonic crystal (1DPC) doped by four-level rare-earth ions is proposed. By controlling the intensity of the coupling field, probe field absorption with population inversion converts to probe field amplification without population inversion. It is found that the amount of probe field amplification through the photonic crystal doped by rare-earth ions is larger than the probe field amplification f...
Source: Results in Physics - May 9, 2019 Category: Physics Source Type: research

Some applications of the modified (G′/G2)-expansion method in mathematical physics
This study proposes a modified (G′/G2)-expansion method to seek new more general exact traveling wave solutions to nonlinear evolution equations (NLEEs). To demonstrate the validity of this method, two interesting NLEEs are considered: the (2 + 1)-dimensional typical breaking soliton equation and (1 + 1)-dimensional classical Boussinesq system of equations. Consequently, we construct some new exact solutions involving the free parameters of the considered equations, which are categorized into three unique forms including rational, periodic, and hyperbolic functions. Thus, this study illustrates the effectiven...
Source: Results in Physics - May 9, 2019 Category: Physics Source Type: research

Electromagnetic interference (EMI) shielding, microwave absorption, and optical sensing properties of BaM/CCTO composites in Ku-band
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): J. Mohammed, T. Tchouank Tekou Carol, H.Y. Hafeez, D. Basandrai, Gopala Ram Bhadu, Sachin Kumar Godara, S.B. Narang, A.K. SrivastavaAbstractSol-gel autocombustion technique was used to synthesized composites of barium hexaferrites (BaM) and calcium copper titanate (CCTO) with chemical composition Ba1−xCoxFe12−x−yDyxLayO19 (x = 0.0, 0.1, 0.2, 0.3 and y = 0.0, 0.4, 0.5, 0.6) and Ca1-xErxCu3Ti4−yMnyO12 (x = 0.0, 0.1, 0.2, 0.3 and y = 0.0, 0.4, 0.5, 0.6) respectively. The BaM/CCTO composites exhibit a single cryst...
Source: Results in Physics - May 9, 2019 Category: Physics Source Type: research

Titanium carbide – Titanium boride composites by self propagating high temperature synthesis approach: Influence of zirconia additives on the mechanical properties
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Mohammed Alsawat, Tariq Altalhi, N.F. Alotaibi, Z.I. ZakiAbstractThis work presents the fabrication of high-dense titanium carbide – titanium boride (TiC-TiB2) composites by self-propagating high temperature synthesis (SHS) under-load methodology. The influence of particle size of boron carbide (B4C) and the amount of titanium (Ti) on the TiC-TiB2 composites properties is explored. The structural features and crystalline structures of the prepared composites were systematically characterized using scanning electron microscopy (SEM) and X-ray d...
Source: Results in Physics - May 7, 2019 Category: Physics Source Type: research

Machining performance of hard-brittle materials by multi-layer micro-nano crystalline diamond coated tools
The objective was to cumulate the increased interfacial adhesion and mechanical properties of each single layer diamond coating, into one multilayer coating, capable of resisting the efforts present between a milling tool and a hard-brittle material (natural marble). The coating morphology, structure, and resistance to crack propagation of the diamond films were evaluated. Furthermore, cutting tests with diamond-coated tools were performed, while observing the machining life and wear mechanism, on a hard-brittle material (marble). The results on the single layers showed that with the increase of the concentration of CH4, t...
Source: Results in Physics - May 7, 2019 Category: Physics Source Type: research

Study of soliton solutions of higher-order nonlinear Schrödinger dynamical model with derivative non-Kerr nonlinear terms and modulation instability analysis
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Muhammad Arshad, Aly R. Seadawy, Dianchen LuAbstractIn this work, soliton solutions of higher order non-linear Schrödinger equation (NLSE) with derivative non-Kerr non-linear terms are constructed by employing two analytical techniques, namely, exp(-Φ(ζ))-expansion and improved simple equation methods. This dynamical model plays a key role in engineering and physics, and it can be equation of pulses promulgation behind ultra-short range in the system of optical communication. The constructed soliton solution helps researchers for under...
Source: Results in Physics - May 6, 2019 Category: Physics Source Type: research

Numerical investigation of temperature dependent water infiltrated D-shaped dual core photonic crystal fiber (D-DC-PCF) for sensing applications
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): P. Madhavan, V. Thamizharasi, M.V. Ranjith Kumar, A. Suresh Kumar, Md. Asaduzzaman Jabin, A. SampathkumarAbstractIn this article, the D-shaped dual core photonic crystal fiber (D-DC-PCF) is investigated after infiltrating the water molecules with respect to the temperature. The overall numerical analysis shows that the output spectrum response for the change of temperature of water liquid given by its spectral shifting and hence the sensitivity is obtained as 3.4 nm/°C and 3.6 nm/°C for x and y-polarization respectively. (S...
Source: Results in Physics - May 5, 2019 Category: Physics Source Type: research

Enhanced dielectric, magnetic and optical properties of Cr-doped BiFeO3 multiferroic nanoparticles synthesized by sol-gel route
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): A.K. Sinha, B. Bhushan, Jagannath, R.K. Sharma, S. Sen, B.P. Mandal, S.S. Meena, P. Bhatt, C.L. Prajapat, A. Priyam, S.K. Mishra, S.C. GadkariAbstractChromium-doped multiferroic bismuth ferrite BiFe1-xCrxO3 (x = 0.00, 0.01, 0.03, 0.05 and 0.07) nanoparticles (NPs) were synthesized by an ethylene glycol-based sol-gel technique and annealed at relatively low temperature of 550 °C. X-ray diffraction (XRD) confirmed the phase purity of pristine BiFeO3 and 1% Cr-doped BiFeO3 NPs. However, a slight impurity phase started to appear in 3% Cr-doped...
Source: Results in Physics - May 4, 2019 Category: Physics Source Type: research

The influence of titanium dioxide nanofiller ratio on morphology and surface properties of TiO2/chitosan nanocomposite
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Saja S. Al-Taweel, Haider R. Saud, Abdul Amir H. Kadhum, Mohd S. TakriffAbstractIn the present study, different ratios of TiO2-chitosan nanocomposite (nT-CS) [1:1(nT-CS1), 1:2 (nT-CS2), and 1:5 (nT-CS5)] were prepared by using the method of solution blending. The characterization of the prepared nanocomposite was done through different techniques such as Fourier transform Infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), Atomic Force Microscope (AFM), Scanning Electron Microscope (SEM), and surface area analysis (BET, BJH). ...
Source: Results in Physics - May 2, 2019 Category: Physics Source Type: research

Effects of high pressure on ScMN2-type (M = V, Nb, Ta) phases studied by density functional theory
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Robert Pilemalm, Sergei Simak, Per EklundAbstractScMN2-type (M = V, Nb, Ta) phases are layered materials that have been experimentally reported for M = Ta and Nb, but their high-pressure properties have not been studied. Here, we have used first-principles calculations to study their thermodynamic stability, elastic and electronic properties at high-pressure. We have used density functional theory to calculate the formation enthalpy relative to the competing binary phases, electronic density of states and elastic constants (cij), bulk (B), s...
Source: Results in Physics - May 2, 2019 Category: Physics Source Type: research

Strong and tunable plasmonic field coupling and enhancement generating from the protruded metal nanorods and dielectric cores
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Yuan-Fong Chou Chau, Chung Tin Chou Chao, Hung Ji Huang, Ya-Chih Wang, Hai-Pang Chiang, Muhammad Nur Syafi'ie Md Idris, Zarifi Masri, Chee Ming LimAbstractNumerical investigation of resonant peak by modifying the number of protruded metal nanorods (MNRDs) and the core material in metal nanoshells for near field intensity are explored by means of the finite element method. The surface plasmon effect arising from the core cases with/without the protruded MNRDs was compared along with that arose from their solid counterparts. A strong and tunable field...
Source: Results in Physics - May 1, 2019 Category: Physics Source Type: research

Direct to indirect band gap transition in two-dimensional germanium carbide through Si substitution
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Somayeh BehzadAbstractIn this work, the structural, electronic and optical properties of Si substituted single-layer GeC are studied by performing density functional theory calculations. Single-layer GeC possesses a direct band gap of 2.11 eV at the K point. The direct band gap feature in single-layer GeC does not change by incorporation of one or two Si atom in a (2 × 2) GeC supercell, while a direct band gap (K–K) into indirect band gap (K–Γ) transition is observed by incorporation of three Si atom in the supercell. A...
Source: Results in Physics - May 1, 2019 Category: Physics Source Type: research

Comprehensive study on photophysical properties of Eu(TTA)3bipy phosphor molecularly doped in PMMA and PS matrices
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Dipti Chitnis, N. Thejo Kalyani, S.J. DhobleAbstractSuccessful synthesis of the most studied europium activated β-diketonate red light emitting complex Eu(TTA)3bipy in which 2,2′ bipyridine is used as a synergistic ligand has been demonstrated. This complex is incorporated into Polymethylmetha acrylate (PMMA) and Polysterene (PS) at 10 and 25 wt% to check its compatibility with polymers. The photophysical properties of molecularly doped blended thin films were characterized by UV–visible absorption spectra and photoluminescence (P...
Source: Results in Physics - April 29, 2019 Category: Physics Source Type: research

Environmental factors controlled resistive switching memory behavior based on BiFeO3/Cu2ZnSnSe4 heterojunction
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Xiaoxia Li, Bai Sun, Wentao Hou, Jiao Chen, Pingping Zheng, Shuangsuo Mao, Shouhui Zhu, Yudong Xia, Guoqiang FuAbstractWith the memory device is required to be widely used in more complex environment, the exploration of new memory device have become a focus of research. Herein, a resistive switching memory device based on BiFeO3(BFO)/Cu2ZnSnSe4(CZTSe) heterostructure is demonstrated, further the resistive switching characteristics of as-prepared device are characterized under different testing environments, suggesting an environmental factors contro...
Source: Results in Physics - April 29, 2019 Category: Physics Source Type: research

Linear and nonlinear optical properties modulation of Sb2Te3/GeTe bilayer film as a promising saturable absorber
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Ling Cheng, Yafei Yuan, Chunmin Liu, Xinran Cao, Jing Su, Xintong Zhang, Hao Zhang, Haibin Zhao, Min Xu, Jing LiAbstractSb2Te3/GeTe bilayer films with different thickness ratios have been deposited on silicon substrate and fused quartz substrates by radio-frequency magnetron sputtering. Linear optical properties and optical bandgap of sample films were investigated firstly. With the thickness ratio changes, their transmittance differences decrease a lot at the wavelength range of 1500–1600 nm. Besides, the modulation depth of saturable absor...
Source: Results in Physics - April 28, 2019 Category: Physics Source Type: research

Prediction of robust multiple Dirac-cones in newly designed perovskite R3¯c phase AgBO3 from first-principles
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Yilin Han, R. Khenata, Tie Yang, Xiaotian WangAbstractIn this paper, a new R3¯c type semimetal has been predicted based on first-principles computations. We found that AgBO3 exhibited robust multiple Dirac-cones which come from the hybridization between O-p and Ag-d orbitals around the Fermi level. As an intermediate state between a trivial insulator and topological insulator, the research regarding this type of Dirac semimetal has great theoretical academic significance. Importantly, for AgBO3, the Dirac-cone bands are linearly dispersed over ...
Source: Results in Physics - April 28, 2019 Category: Physics Source Type: research

Construction of modulation instability analysis and optical soliton solutions of pertubed nonlinear Schrödinger dynamical equation with power law nonlinearity in non-kerr medium
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Naila Nasreen, Aly R. Seadawy, Dianchen Lu, Muhammad ArshadAbstractIn this paper the perturbed nonlinear Schrödinger equation (PNLSE) with power law nonlinearity in the medium of non-kerr is analyzed by employing Reccati equation mapping method. Perturbed nonlinear Schrödinger equation depict the effect of quantic non-linearity on propagation of the ultra-short optical pulses in the medium of non-kerr, similar to optical fibers. We achieved various types of soliton solutions, some of them are novel and does not exist previously. Graphical ...
Source: Results in Physics - April 25, 2019 Category: Physics Source Type: research

Numerical analysis of heat removal from gas phase clusters during condensation of Cu nanoparticles under Ar atmosphere
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Viyan J. Jalal, Omed Gh. Abdullah, Sarkew S. AbdulkareemAbstractThe statistical analysis of the molecular dynamics modeling for the nucleation of copper (Cu) vapors under argon (Ar) atmosphere in the evaporation-condensation technology was carried out. The model was used to calculate the nucleation in a cell containing 5000 atoms of Cu and 10,000 atoms of Ar. The probabilities of various outcomes in the collision of Ar and Cu atoms with Cu clusters were determined. It was found that pair collisions have a greater probability than the triple coll...
Source: Results in Physics - April 25, 2019 Category: Physics Source Type: research

Application research of nano-storage materials in cold chain logistics of e-commerce fresh agricultural products
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Bing Bai, Kang Zhao, Xiaozheng LiAbstractIn order to study the effect of different phase change coolants on the quality of e-commerce fresh agricultural products distribution box, this experiment selected pure water, mass fraction of 18.8% NaCl, 46.3% ethanol and 29% CaCl2 solution. The ice bag, with no ice bag as a control, simulates the distribution of the summer e-commerce fresh agricultural product distribution box, and measures the temperature inside the box and the central temperature, sensory and physical and chemical indicators of the agricu...
Source: Results in Physics - April 25, 2019 Category: Physics Source Type: research

A residual stresses numerical simulation and the relevant thermal-mechanical mapping relationship of Fe-based coatings
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Haoliang Tian, Changliang Wang, Mengqiu Guo, Zhihui Tang, Hui Tong, Xinkun Wang, Shicheng Wei, Binshi XuAbstractResidual stresses model comprehensively considers the three main sources of residual stress during the coating deposition process: quenching stress, thermal stress and phase transformation-induced stress. With the deposited layer temperature, coating thickness, number of deposited layers and relevant workpiece dimensions as the input, the model can easily calculate the final residual stress distribution in the coating. Moreover, the therma...
Source: Results in Physics - April 24, 2019 Category: Physics Source Type: research

Analysis of pore size distribution and fractal dimension in tight sandstone with mercury intrusion porosimetry
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Fuyong Wang, Kun Yang, Jingxi You, Xiujie LeiAbstractThe pore size distribution (PSD) and fractal dimension of tight sandstone are studied with mercury intrusion porosimetry (MIP). Four different fractal models are used to calculate fractal dimensions from mercury intrusion capillary pressure (MICP) and mercury extrusion capillary pressure (MECP) respectively, and the physical meanings of the fractal dimensions calculated from different fractal models are discussed. The fractal characteristics of tight sandstone pore spaces with unimodal and bimodal...
Source: Results in Physics - April 24, 2019 Category: Physics Source Type: research

A skew freeform reflector design method for prescribed off-axis irradiance
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Jian-Jia Su, Chung-Hao Tien, Yu-Lin Tsai, Chin-Tien WuAbstractIn this paper we proposed a new methodology for designing freeform reflectors tailored to redistribute the radiant flux emitted by a point light source onto a target plane with the prescribed irradiance pattern. Based on the laws of reflection and energy conservation, a skew freeform model with a set of second-order ordinary differential equations formulating the ray tracing between the source and target domain was presented. A 3D freeform reflector was constructed by using such skew free...
Source: Results in Physics - April 22, 2019 Category: Physics Source Type: research

A (3+1)-dimensional generalized BKP-Boussinesq equation: Lie group approach
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Chaudry Masood Khalique, Letlhogonolo Daddy MolelekiAbstractA (3+1)-D generalized B-type KP-Boussinesq equation, which was recently formulated in the literature, is investigated here from Lie group standpoint. A solution is obtained by Lie symmetry reductions and direct integration in terms of incomplete elliptic integral. Furthermore, hyperbolic and trigonometric functions solutions are derived by invoking the (G′/G)- expansion method. Finally, we construct conservation laws of the aforementioned equation by utilizing the multiplier method an...
Source: Results in Physics - April 21, 2019 Category: Physics Source Type: research

Study of optical soliton fibers with power law model by means of higher-order nonlinear Schrödinger dynamical system
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Sultan Z. Alamri, Aly R. Seadawy, Haya M. Al-SharariAbstractIn this paper, the higher-order nonlinear Schrödinger equation (NLSE) represents description of the propagation of short light pulses in mono-mode optical fibers. The optical solitons and solitary wave solutions of higher-order nonlinear Schrödinger equation mono-mode optical fibers are organized by apply the modified simple equation method to get the exact solutions and possibility of given this solution graphically at a given moment. This solutions help the researchers to study ...
Source: Results in Physics - April 21, 2019 Category: Physics Source Type: research