Distributed gas detection utilizing Fourier domain optical coherence based absorption spectroscopy
In this study, a new method called Fourier domain optical coherence based absorption spectroscopy (FD-OCAS) is proposed for distributed gas detection for the first time. Mach-Zehnder interferometer based quasi-distributed structure is developed for proof-concept demonstration and experimental verification. Optical interference happens between reference arm and sensing arms of the constructed Mach-Zehnder interferometer. Different sensing arms coded with different fiber lengths contribute different frequency components in ultimate interference signals. Fourier transform is used to separate each frequency to identify differe...
Source: Results in Physics - March 5, 2019 Category: Physics Source Type: research

A combined electrochemical and theoretical analysis of environmentally benign polymer for corrosion protection of N80 steel in sweet corrosive environment
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Ambrish Singh, Neetesh Soni, Yu Deyuan, Ashish KumarAbstractThe corrosion inhibition efficiency of aniline, formaldehyde and piperazine based polymer (ADPD) on N80 steel in 3.5% NaCl solution saturated with carbon dioxide was investigated using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, weight loss, scanning electrochemical microscopy (SECM), scanning electron microscopy (SEM) measurements, density functional theory (DFT) and molecular dynamics simulation (MD). The adsorption of polymer onto N80 steel surface followe...
Source: Results in Physics - March 5, 2019 Category: Physics Source Type: research

Importance of defect nanocrystalline calcium hydroxyapatite characteristics for developing the dental biomimetic composites
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): D.L. Goloshchapov, A.S. Lenshin, D.V. Savchenko, P.V. SeredinAbstractApplying a set of structural-spectroscopic methods of analysis we have studied the relationships between the structure, morphology and sorption characteristics of the samples of nanocrystalline carbonate-substituted hydroxyapatite (C-HAP) synthesized with the use of biogenic calcium source (poultry eggshell) obtained by the chemical deposition from a solution.With the use of X-ray diffractometry and X-ray microanalysis it was found that the appearance of impurities in the structure...
Source: Results in Physics - March 5, 2019 Category: Physics Source Type: research

Gamma photon protection properties of some cancer drugs for medical applications
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Nergiz Yıldız Yorgun, Esra KavazAbstractChemotherapy stops or slows down the growth and proliferation of cancer cells. Chemotherapy usually uses in combination with, surgery, radiotherapy or other treatments. Therefore, it is useful to calculate the photon interaction parameters to determine the energy accumulation and penetration in tissue due to the interaction of cancer drugs with radiation. In this work, the mass attenuation coefficient (μ/ρ), half value layer (HVL) and effective atomic number (Zeff) of some cancer drugs (Tadocel, Fluro...
Source: Results in Physics - March 5, 2019 Category: Physics Source Type: research

Exploring the nonlinear optical properties of impurity doped quantum dots in the light of noise-binding energy interplay
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Sk. Md. Arif, Aindrila Bera, Manas GhoshAbstractThe variation of some nonlinear optical (NLO) properties of doped GaAs quantum dot (QD) with gradual change in the binding energy (BE) of the system has been examined. In this context special attention has been given on the role of noise that can be applied to the system via additive and multiplicative routes. The profiles of the NLO properties exhibit important features in terms of peak-shift and peak-height. Both of these aspects, however, depend on applied noise and also on the mode of its introduct...
Source: Results in Physics - March 5, 2019 Category: Physics Source Type: research

Role of organic/inorganic-sulfur doping on photocatalytic behavior of mesoporous bimetallic oxides heterojunction
Publication date: June 2019Source: Results in Physics, Volume 13Author(s): Sheng Liu, Lei Qin, Zehai Xu, Yilian Zheng, Liang Shen, Qinglin Liu, Yinghua Lu, Guoliang ZhangAbstractA series of novel sulfur-doped mesoporous bimetallic oxides with controllable structure and property were synthesized for acid-induced photo-Fenton. The one-pot sol-gel strategy allowed high-dispersion and strong adhesion of different organic-/inorganic-sulfur species (including CH4N2S, C5H11NO2S, (NH4)2SO4 and Na2S2O3) in host matrix to achieve highly active bimetallic heterojunction with stronger acid strength. It was found that organic-sulfur do...
Source: Results in Physics - March 5, 2019 Category: Physics Source Type: research

Enhanced photocatalytic performance and stability of 1T MoS2 transformed from 2H MoS2 via Li intercalation
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Zhonghuai Xia, Yaqiu Tao, Zhigang Pan, Xiaodong ShenAbstractMolybdenum disulfide is a competitive photocatalyst in organic pollutant degradation. 1T MoS2 was prepared by Li intercalation from hydrothermal synthesized 2H phase MoS2. The 1T MoS2 presents a lager intralayer distance of 12.0 Å compared to that of 6.5 Å in 2H MoS2. A stability of the prepared 1T phase was studied and a complete transformation of 1T to 2H was reached at 120 °C. The addition of nano-Au particle reduce the interlayered interaction in the MoS2 lattice....
Source: Results in Physics - March 1, 2019 Category: Physics Source Type: research

Influences of substrate pretreatments and Ti/Cr interlayers on the adhesion and hardness of CrAlSiN and TiAlSiN films deposited on Al2O3 and ZrO2-8Y2O3 thermal barrier coatings
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Wolfgang Tillmann, Alexander Fehr, Dominic Stangier, Markus DildropAbstractUsing atmospheric plasma spraying (APS), ceramic Al2O3 and ZrO2-8Y2O3 thermal barrier coatings (TBC) were applied on AISI H11 (1.2343) and subsequently polished to serve as a substrate to magnetron sputter CrAlSi7.5N and TiAlSi7.9N films. The influences of polishing as well as plasma etching processes on the surface roughness and residual stresses of the TBCs were correlated with the adhesion of the metal nitride films. As metallic interlayers are typically used to metallize...
Source: Results in Physics - February 28, 2019 Category: Physics Source Type: research

The trajectory of a charged particle in the magnetic field of an infinite current carrying wire in the nonrelativistic limit
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Masoud Asadi-Zeydabadi, Clyde S. ZaidinsAbstractWe have calculated in a closed form solution, in terms of modified Bessel function the first kind of order 0 and 1, for the motion of a positively charged particle in the magnetic field of an infinitely long, current-carrying wire in the nonrelativistic range. The orbits are not closed but exhibit a drift in the direction of the current with a speed that is independent of the launch angle. We found the drift velocity, drift displacement and the corresponding time, which we call the period. (Source: Results in Physics)
Source: Results in Physics - February 28, 2019 Category: Physics Source Type: research

Magnetic properties and hydrides precipitation observation of nitrogen doping niobium used for accelerator applications
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Ziqin Yang, Xiangyang Lu, Yuan He, Weiwei Tan, Shichun Huang, Hao GuoAbstractThe results from DC magnetization measurements and direct observation of hydrides precipitation of rectangular bulk nitrogen doping niobium (Nb) samples used for the fabrication of superconducting radio frequency (SRF) cavities were presented. The surface treatments of the Nb samples consisted of heavy electropolishing (EP), nitrogen doping and the subsequent EP with different amounts of material removal. The critical fields and the superconducting parameters were calculat...
Source: Results in Physics - February 27, 2019 Category: Physics Source Type: research

Analytical wave solutions for the nonlinear three-dimensional modified Korteweg-de Vries-Zakharov-Kuznetsov and two-dimensional Kadomtsev-Petviashvili-Burgers equations
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Dianchen Lu, Aly Seadawy, David YaroAbstractIn this work, we study the procedure involved in applying the extended (G′(ϕ)G(ϕ))-expansion method in solving nonlinear partial differential equations. The method depends on the auxiliary equation (G″(ϕ)=-(αG′(ϕ)+βG(ϕ))) which the general solution is liable on three conditions (α2-4β>0,α2-4β
Source: Results in Physics - February 27, 2019 Category: Physics Source Type: research

Effects of gamma radiation on the impact strength of polypropylene (PP)/high density polyethylene (HDPE) blends
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Wenzhao Wang, Xiaochao Zhang, Zongyuan Mao, Weiquan ZhaoAbstractPolypropylene (PP) blends with the other polymer, like polyethylene (PE), is normally used as for improving PP impact strength. In this paper, we wanted to improve the PP/high density polyethylene (HDPE) impact strength by increasing the compatibility of PP/HDPE with gamma irradiation process that the un-irradiated ones were also used for comparison. It was obvious that the impact strength increased when the HDPE (10 phr) was added into the PP matrix, compared with neat PP. Meanwhile...
Source: Results in Physics - February 27, 2019 Category: Physics Source Type: research

Effect of V/III ratio on the optical properties of (3 1 1)A and (3 1 1) B oriented InAlAs/InP heterostructures
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Badreddine Smiri, Ibtissem Fraj, Mohamed Bouzidi, Faouzi Saidi, Ahmed Rebey, Hassen MaarefAbstractInAlAs alloy were grown on a InP (3 1 1) substrate with different polarity, by metalorganic chemical vapor deposition (MOCVD) growth. Photoluminescence (PL) and Photoreflectance (PR) measurements have been carried out, in our samples, in order to study the V/III flux ratio effect in type-II heterostructures. It is found that, with increasing excitation power density, the PL line was shifted at higher energy side and no saturation of its associated ...
Source: Results in Physics - February 27, 2019 Category: Physics Source Type: research

Strain coupling and dynamic relaxation in multiferroic metal-organic framework [(CH3)2NH2][Mn(HCOO)3] with perovskite structure
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Zhiying Zhang, Hao Tang, Dongpeng Cheng, Jikang Zhang, Yatao Chen, Xin Shen, Hongliang YuAbstractStrain coupling with ferromagnetism and ferroelectricity plays an important role in the development of multiferroic metal-organic frameworks (MOFs) with strong magnetoelectric coupling, but the underlying mechanisms have not been well understood. Strain coupling and dynamic relaxation in multiferroic MOF with perovskite structure [(CH3)2NH2][Mn(HCOO)3] were investigated using X-ray diffraction (XRD), Raman spectroscopy, Infra-red (IR) spectroscopy, diff...
Source: Results in Physics - February 27, 2019 Category: Physics Source Type: research

Detailed understanding on the relation of various pH and synthesis reaction times towards a prominent low temperature H2S gas sensor based on ZnO nanoplatelets
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Ioannis Kortidis, Hendrik C. Swart, Suprakas Sinha Ray, David E. MotaungAbstractAn unceasing scientific challenge to monitor the emissions of toxic and flammable gases in a selective approach is of great importance for safety of human health. As a result, herein, we report on the detailed study of the gas sensing characteristics of ZnO nanostructures prepared at various reaction pH and times. The findings revealed that the variation of synthesis reaction pH and times play a vital role on the morphology and structure. The ZnO-4h@10.5 pH based sensor...
Source: Results in Physics - February 27, 2019 Category: Physics Source Type: research

Investigation of gamma-ray attenuation parameters of some materials used in dental applications
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Nigar Abbasova, Zeynep Yüksel, Elchin Abbasov, Hasan Gülbiçim, Mustafa Çağatay TufanAbstractRadiological parameters of composite filler, zirconium and acrylic coating materials used in dental treatment are determined. Mass attenuation coefficients (μm) of these materials have been experimentally determined for 9 different gamma energies emitting from Ra-226 and Eu-152 radioactive sources by using gamma spectrometry system with (3″ × 3″) NaI(Tl) detector. Effective atomic and electron numbers (Zeff, ...
Source: Results in Physics - February 27, 2019 Category: Physics Source Type: research

Area-selective electrodeposition of micro islands for CuInSe2-based photovoltaics
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): David Correia, Daniel Siopa, Diego Colombara, Sara Tombolato, Pedro M.P. Salomé, Kamal Abderrafi, Pedro Anacleto, Phillip J. Dale, Sascha SadewasserAbstractFor mass fabrication of highly-efficient photovoltaic modules based on Cu(In,Ga)Se2 (CIGSe) absorber layers the availability and cost of the critical raw materials In and Ga present a potential bottleneck. The micro-concentrator solar cell concept provides a solution by using micro lenses to concentrate incoming sun light on an array of micro-sized CIGSe solar cells. The challenge is to f...
Source: Results in Physics - February 26, 2019 Category: Physics Source Type: research

Microstructure and electrical properties of silica-Zn2SiO4-Mn glass-ceramics as composite for optoelectronic devices
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): K. Omri, R. Lahouli, L. El MirAbstractIn the present study, silica-Zn2SiO4-Mn (silica-ZSiMn) glass-ceramics samples were synthesized via was elaborated by sol-gel route. The microstructure and electrical properties of glass-ceramics samples was investigated. The crystal structure and microstructure of glass-ceramics were studied by X-ray diffraction (XRD) and transmission electron microscope (TEM) techniques. XRD studies reveal the presence of Zn2SiO4 phases. Electrical studies show that as frequency increases, the conductivity decreases until a sp...
Source: Results in Physics - February 26, 2019 Category: Physics Source Type: research

The field-dependent rheological properties of plate-like carbonyl iron particle-based magnetorheological elastomers
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Norhiwani Hapipi, Siti Aishah Abdul Aziz, Saiful Amri Mazlan, Ubaidillah, Seung Bok Choi, Norzilawati Mohamad, Muntaz Hana Ahmad Khairi, Abdul Yasser Abd. FatahAbstractThis paper investigated the rheological properties of a novel magnetorheological elastomer (MRE) with plate-like carbonyl iron particles (CIPs) as magnetic particles. MRE samples with different shape of CIPs; plate-like (MRE-P) and spherical-like (MRE-S), were prepared. The current work further highlights the effects of varying curing magnetic field towards the rheological properties...
Source: Results in Physics - February 26, 2019 Category: Physics Source Type: research

A comparative study of the interaction of nickel, titanium, palladium, and gold metals with single-walled carbon nanotubes: A DFT approach
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): K.W. Kayang, E. Nyankson, J.K. Efavi, V.A. Apalangya, B.I. Adetunji, G. Gebreyesus, R. Tia, E.K.K. Abavare, B. Onwona-Agyeman, A. YayaAbstractInteractions between transition metal atoms, nickel, titanium, palladium and gold and (3,3), (4,2), (6,0) and (5,1) carbon nanotubes were studied using first principles calculations. The Fermi energy levels of the carbon nanotubes studied were found to increase during interactions with the transition metal atoms. Amongst the four metals, gold atom was found to have an enhanced interaction with the nanotubes t...
Source: Results in Physics - February 25, 2019 Category: Physics Source Type: research

Range estimation of horizontal stress of deep rock based on Mohr-Coulomb criterion
In this study, based on the Mohr-Coulomb criterion, the ultimate stable equilibrium conditions of the underground rock mass were applied to estimate the horizontal stress range. The estimated values agreed strongly with the in-situ measurement results, demonstrating the validity and feasibility of this estimation method. Meanwhile, this approach can explain the phenomenon whereby the ratio of the horizontal to vertical stress is distributed in a wide range of the shallow cruse zone but in a narrow range of the deep area. Furthermore, the influences of different parameters on the Mohr-Coulomb envelope were analyzed. (Source...
Source: Results in Physics - February 25, 2019 Category: Physics Source Type: research

Split ring resonator loaded horizontally inverse double L-shaped metamaterial for C-, X- and Ku-Band Microwave applications
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Ahmed Mahfuz Tamim, Mohammad Rashed Iqbal Faruque, Md. Jubaer Alam, Sikder Sunbeam Islam, Mohammad Tariqul IslamAbstractThe principle purpose of this study was to produce a horizontally inverse double L-shaped metamaterial that was applicable for triple-band applications and that exhibited negative permittivity and permeability in the resonance frequencies. The horizontally inverse double L-shaped structure had a square split ring resonator on the outer side that was etched on a Rogers RT5880 dielectric substrate material. The size of the unit cell...
Source: Results in Physics - February 25, 2019 Category: Physics Source Type: research

Photon and neutron shielding characteristics of samarium doped lead alumino borate glasses containing barium, lithium and zinc oxides determined at medical diagnostic energies
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): M. Almatari, O. Agar, E.E. Altunsoy, O. Kilicoglu, M.I. Sayyed, H.O. TekinAbstractIn the present work, we studied the radiation shielding parameters such as mass attenuation coefficients, effective atomic number, half value layer, mean free path, macroscopic effective removal cross-sections and neutron transmission function for samarium doped lead alumino borate glasses containing barium, lithium and zinc oxides at medical diagnostic energies (between 20 and 150 keV) using MCNPX code. The results showed that the photon attenuation depends on the ...
Source: Results in Physics - February 25, 2019 Category: Physics Source Type: research

Antibacterial mechanisms of nanocrystalline diamond film and graphene sheet
In this study, we investigated the antibacterial activities of a nanocrystalline diamond (NCD) thin film and graphene sheet. In addition, we functionalized the surfaces of the NCD film and graphene sheet with fluorine by plasma treatments to increase their antibacterial activities. The antibacterial activities of the NCD film and graphene sheet were confirmed by both colony forming unit (CFU) counting and adenosine triphosphate (ATP) bioluminescence assay based on the drop-test method. The CFU counting showed that the ratios of surviving bacteria on the NCD film and graphene sheet were 27.5% and 13.9%, respectively. The ra...
Source: Results in Physics - February 25, 2019 Category: Physics Source Type: research

Critical remark on the FSDP-related correlations in chalcogenide glasses as treated in the paper [Alekberov RI, Isayev AI, Mekhtiyeva SI, Fábián M. Local structures and optical properties of As-Se-Te(S) chalcogenide glasses. Phys B: Condens Matter 2018; 550: 367–375]
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): O. ShpotyukAbstractIn the paper [Phys. B 550 (2018) 367–375], Alekberov, Isayev, Mekhtiyeva and Fábián have performed very erroneous calculation on diameter of voids responsible for the first sharp diffraction peak (FSDP) in neutron diffraction patterns of As2Se3-based glasses. The authors used wrong relation for the FSDP position taken from entirely speculative assertion presented by Kavetskyy in [Semicond. Phys. Quantum Electron. Optoelectron. 16 (2013) 136–139], assuming unreasonable equivalence between chemistry of cha...
Source: Results in Physics - February 25, 2019 Category: Physics Source Type: research

Functionalized silver nanoparticles as an effective medium towards trace determination of arsenic (III) in aqueous solution
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Bijoy Sankar Boruah, Nikhil Kumar Daimari, Rajib BiswasAbstractArsenic is well known for its toxicity and various health effects. In this work, we report a simple, environment friendly and cost effective colorimetric approach for selective detection of arsenic (III) in aqueous medium. PEG functionalized silver nanoparticles were synthesized by chemical reduction method and applied for detection of heavy metal ions like arsenic(III), cobalt (II), cadmium (II), copper (II), iron (III), lead (II), mercury (II), magnesium (II) and nickel (II). In case ...
Source: Results in Physics - February 23, 2019 Category: Physics Source Type: research

Effect of the azimuthal gradient of the thermal load on the depolarization of cylindrical vector beams propagating in a side non-uniformly pumped isotropic medium
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Ce Yang, Hong-Pan Peng, Meng Chen, Shang Lu, Ning MaAbstractThe theoretical and experimental investigations of the depolarization of cylindrical vector beams when they propagate into a side non-uniformly pumped isotropic laser medium. The azimuthal gradient of thermal load inside the cross-section of laser rod and its induced dynamic process on thermally induced birefringence are the internal mechanism of the depolarization of the cylindrical vector beams. The experiment results show that the depolarization degree is proportional to the azimuthal g...
Source: Results in Physics - February 23, 2019 Category: Physics Source Type: research

Superconductivity and low-energy nuclear reactions
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Frederick J. MayerAbstractIt is proposed that the excess-energy released in Low-Energy Nuclear Reactions (aka cold fusion) is initiated in a phase-transition yielding a fraction of superconducting electrons, which then start a deuteron-driven chain of nuclear reactions recently detailed in the geophysics arena. (Source: Results in Physics)
Source: Results in Physics - February 23, 2019 Category: Physics Source Type: research

Nonlinear magneto convection due to horizontal magnetic field and vertical axis of rotation due to thermal and compositional buoyancy
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): A. Benerji Babu, G. Shiva Kumar Reddy, S.G. TagareAbstractThis paper presents linear and weakly non linear analysis of magnetoconvection due to horizontal magnetic field and vertical axis of rotation due to thermal and compositional buoyancy. For linear stability analysis, the normal mode analysis is utilized to find the Rayleigh number which is the function of Rosby number, Lewis number and Ekman number. Also, the correlation between Rayleigh number and wave number is graphically analyzed. The Newell-Whitehead scheme is employed to derive two dime...
Source: Results in Physics - February 23, 2019 Category: Physics Source Type: research

Complex optical solutions and modulation instability of hyperbolic Schrödinger dynamical equation
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Wilson Osafo Apeanti, Aly R. Seadawy, Dianchen LuAbstractComplex hyperbolic Schrödinger equation describes ultra-short pulse propagation in nonlinear media fiber optics. In this paper, new complex solutions for the complex hyperbolic Schrödinger equation are constructed using generalized elliptic equation rational expansion method. The aquired new solutions are complex rational, trigonometric and hyperbolic solution expressed by kink solitons, bright solitons, singular solitons and periodic solutions. The moment of obtained solutions are ...
Source: Results in Physics - February 23, 2019 Category: Physics Source Type: research

Design of D-shaped elliptical core photonic crystal fiber for blood plasma cell sensing application
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Kawsar Ahmed, Bikash Kumar Paul, B. Vasudevan, Ahmed Nabih Zaki Rashed, R. Maheswar, I.S. Amiri, P. YupapinAbstractIn this research, the proposed design presents the compact sensing performances while infiltrating the blood fluid in the central hole of the D-shaped elliptical dual-core photonic crystal fiber (PCF) configuration. The properties such as index difference, coupling length, and transmission spectrum pertains the sensing property of the blood plasma cell. The proposed sensor can detect plasma by finite element method (FEM) which can be u...
Source: Results in Physics - February 22, 2019 Category: Physics Source Type: research

Optimized dye-sensitized solar cells: A comparative study with different dyes, mordants and construction parameters
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Domingo Rangel, Juan Carlos Gallegos, Susana Vargas, Francisco García, Rogelio RodríguezAbstractCochineal and β-carotene were the sensitizers used in the preparation of these solar cells; potassium alum and citric acid were used, separately, as mordant; acetyl acetone was the medium. For comparison purposes, another solar cell was prepared using a dye obtained from achiote (Bixa Orellana) with acetyl acetone. The mordants provide a stabilization of the pigment by improving the adhesion with the substrate (the mesoporous layer), i...
Source: Results in Physics - February 22, 2019 Category: Physics Source Type: research

The electronic and optical properties of MgO mono-layer: Based on GGA-mBJ
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Bromand Nourozi, Amin Aminian, Narges Fili, Yousof Zangeneh, Arash Boochani, Pezhman DarabiAbstractThe electronic and optical properties of MgO mono-layer were calculated based on the density functional theory (DFT) with FP-LAPW method using PBE-GGA and GGA-mBJ approximations. The electronic calculations of MgO mono-layer show a more interesting behavior than its bulk phase such as decreasing the band gap from 7.8 eV to 3.1 eV (for GGA) and 4.2 eV (for GGA-mBJ). Also, the MgO mono-layer has a direct band gap at Γ point in the Brillion Z...
Source: Results in Physics - February 22, 2019 Category: Physics Source Type: research

Relationship between porosity, pore parameters and properties of microarc oxidation film on AZ91D magnesium alloy
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Pei Zhang, Yu ZuoAbstractMicroarc oxidation films on AZ91D magnesium alloy were prepared in sodium silicate-based electrolyte by a high-frequency bipolar pulsing mode. The effects of porosity and pore parameters on the properties of the films were studied. The results show that with the increased current frequency, the relative content of Mg element and the relative content of MgSiO3 phase in the films increase. The bonding strength of the films increases and the film microhardness decreases with the increased porosity respectively. Pore diameter c...
Source: Results in Physics - February 22, 2019 Category: Physics Source Type: research

Comment on “Polarization-insensitive and thin stereometamaterial with broadband angular absorption for the oblique incidence”
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Li Zeng, Hai-Feng Zhang, Guo-Biao Liu, Tong HuangAbstractIn a recently published report, a polarization-insensitive and thin stereometamaterial (PITS) is proposed by Li et al. (2015) and they indicated that it can realize a broadband absorption by the orthogonal double-split-ring structure for the oblique incidence. However, the high cross-polarization reflection component is ignored by the original authors for the proposed PITS. When the incident angle is 45° for TE-polarization, it is found that there are only a few absorption peaks occurred ...
Source: Results in Physics - February 22, 2019 Category: Physics Source Type: research

Experimental study on the reliability of water/fluoropolymer/ITO contact in electrowetting displays
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Rui Zhou, Qianling Ye, Hui Li, Hongwei Jiang, Biao Tang, Guofu ZhouAbstractThe practicability of using DI water in electrowetting displays with a thick layer of fluoropolymer and the reliability of water/fluoropolymer/indium tin oxide contact was investigated experimentally. Electrowetting performances of DI water on a fluoropolymer coating of indium tin oxide surface were tested via sessile droplet test, compared with that of ionic solutions. A platform with a camera system was built to study the electrical property and breakdown phenomenon in wat...
Source: Results in Physics - February 21, 2019 Category: Physics Source Type: research

Binary-medium-based constitutive model of frozen soils subjected to triaxial loading
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): De Zhang, Enlong LiuAbstractTo model the elastoplastic behaviors of frozen soils, a binary-medium-based constitutive model is developed and validated by a series of cryotriaxial compressive tests. In the framework of the proposed model, frozen soils are conceptualized to consist of structural blocks and weakened bands. Herein, the structural blocks are idealized as bonded elements with elastic-brittle deformational behaviors. Moreover, the weakened bands are conceptualized as frictional elements whose deformational characteristics are described by ...
Source: Results in Physics - February 21, 2019 Category: Physics Source Type: research

Charge storage in WO3 polymorphs and their application as supercapacitor electrode material
We report simple and facile way to synthesize four phases of tungsten oxide from same precursor materials only by changing the pH and temperature values. Monoclinic, hexagonal, orthorhombic and tetragonal phase obtained, were analyzed and tested for supercapacitor application. The electrochemical analysis of four phases indicates that the hexagonal phase is best-suited electrode material for supercapacitor. The hexagonal phase exhibits higher specific capacitance (377.5 Fg−1 at 2 mV s−1), higher surface capacitive contribution (75%), better stability and rate capability of all four phases. (Source: Results in Physics)
Source: Results in Physics - February 21, 2019 Category: Physics Source Type: research

Soft-template assisted hydrothermal synthesis of size-tunable, N-doped porous carbon spheres for supercapacitor electrodes
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Zhongguan Liang, Luomeng Zhang, Hao Liu, Jianping Zeng, Jianfei Zhou, Hongjian Li, Hui XiaAbstractPorous carbon spheres ranging in size from nanometer to micrometer have been attracting worldwide attention owing to their excellent performance and wide application. In this paper, nitrogen-doped porous carbon spheres (NPCSs) are successfully prepared by a facile hydrothermal strategy under the assistance of triblock copolymer F108 as soft template. The effect of the ethanol/water volume ratios, concentration of F108 and ammonia, and the alkyl chain o...
Source: Results in Physics - February 20, 2019 Category: Physics Source Type: research

Dispersive wave solutions of the nonlinear fractional Zakhorov-Kuznetsov-Benjamin-Bona-Mahony equation and fractional symmetric regularized long wave equation
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): David Yaro, Aly R. Seadawy, Dianchen Lu, Wilson Osafo Apeanti, Saviour Worlanyo AkuamoahAbstractIn this paper, we obtain several novelty solutions by applying the improved F-expansion method to solve the space–time fractional Zakhorov Kuznetsov Benjamin Bona Mahony (ZKBBM) equation and the space–time fractional symmetric regularized long wave (SRLW) equation. These two fractional equations have been extensively used to explain numerous forms of physical mechanism in mathematical physics and engineering. The suggested fractional complex ...
Source: Results in Physics - February 19, 2019 Category: Physics Source Type: research

Pulley-type metallic microring surface plasmon polariton sensor based on Otto-configuration
In this study, we design a compact sensor with high sensitivity for refractive index change. A pulley-type metallic microring to produce surface plasmon polariton is proposed. The light is coupled onto the metallic microring using a dielectric waveguide. The 2-D finite-difference time-domain method is used to determine the optimal radius of the metallic microring. We also investigate the relation between the radius of the metallic microring and the sensitivity of the refractive index change. The highest sensitivity of 602.69 nm/RIU can be obtained at the resonance wavelength of 1536.7 nm. (Source: Results in Physics)
Source: Results in Physics - February 19, 2019 Category: Physics Source Type: research

Resistive switching and synaptic properties modifications in gallium-doped zinc oxide memristive devices
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Shilpa S. More, Pratiksha A. Patil, Kalyani D. Kadam, Harshada S. Patil, Snehal L. Patil, Aishwarya V. Pawar, Sharon S. Kanapally, Dhanashri V. Desai, Shraddha M. Bodake, Rajanish K. Kamat, Sungjun Kim, Tukaram D. DongaleAbstractThe massively parallel computing capabilities of the human brain can be mimicked with the help of neuromorphic computing approach and this can be achieved by developing the electronic synaptic device. In the present work, we have synthesized gallium-doped ZnO thin films using a cost-effective hydrothermal method and charact...
Source: Results in Physics - February 17, 2019 Category: Physics Source Type: research

Study on the propagation law of temperature field in surrounding rock of underground coal gasification (UCG) combustion cavity based on dynamic thermal parameters
This study can play an important role in promoting the progress of surrounding rock control technology of underground coal gasification. (Source: Results in Physics)
Source: Results in Physics - February 17, 2019 Category: Physics Source Type: research

Broadband radar cross section reduction by in-plane integration of scattering metasurfaces and magnetic absorbing materials
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Wei Li, Yazhong Zhang, Tianlong Wu, Jie Cao, Zhihong Chen, Jianguo GuanAbstractAn in-plane hybrid design is proposed to achieve broadband radar cross section (RCS) reduction based on the integration of a diffusion scattering electromagnetic band-gap (EBG) metasurface and a magnetic absorbing material (MAM) at a thin thickness (d). A scattering field calculation formula is derived for the hybrid design, in which the MAM and EBG metasurface have complementary dominant working bands. Moreover, they are able to achieve strong RCS reduction in broad ban...
Source: Results in Physics - February 17, 2019 Category: Physics Source Type: research

Wavelength-scale gas-filled cuboid acoustic lens with diffraction limited focusing
We report both numerically and experimentally the acoustic focusing of a cuboid of 2λ side, where λ is the wavelength in air. From these results, it can be derived that its focusing capabilities are close to the diffraction limit: at frequency of 5000 Hz, acoustic beam waist is about 0.5 wavelength and the gain is 8.8 dB. The flat structure lens proposed open new possibilities to design and built new lightweight and low cost acoustic lenses for different applications. (Source: Results in Physics)
Source: Results in Physics - February 16, 2019 Category: Physics Source Type: research

Effect of sintering temperature on physical and structural properties of Alumino-Silicate-Fluoride glass ceramics fabricated from clam shell and soda lime silicate glass
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Wan Nurshamimi Wan Jusoh, Khamirul Amin Matori, Mohd Hafiz Mohd Zaid, Norhazlin Zainuddin, Mohammad Zulhasif Ahmad Khiri, Nadia Asyikin Abdul Rahman, Rohaniah Abdul Jalil, Esra KulAbstractA study on the effect of sintering temperature to the physical and structural of Alumino-Silicate-Fluoride (ASF) glass ceramics fabricated from clam shell (CS) and soda lime silicate (SLS) glass is conducted through conventional melt-quench technique. ASF glass ceramics composition with 25SLS-20CS-20P2O5-20Al2O3-15CaF2 by weight percentage is analysed by using Ene...
Source: Results in Physics - February 16, 2019 Category: Physics Source Type: research

Effect of Y substitution on magnetic and transport properties of Ba0.95La0.05Ti1−xYxO3 ceramics
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): A. Ahad, M.A. Taher, Mithun Kumar Das, M. Zahidur Rahaman, M.N.I. KhanAbstractDielectric materials with giant dielectric constant are highly demanded for their many high-tech applications. While ferroelectric BaTiO3 inherently possesses polarization within it, high dielectric constant can only be obtained by structural as well as chemical modification. In this literature, we report the existence of high room temperature permittivity (≥103) in Ba0.95La0.05Ti1−xYxO3 (where x = 0.00–0.15) ceramics prepared by the pressureless conventi...
Source: Results in Physics - February 16, 2019 Category: Physics Source Type: research

Analysis of Cd2+ and In3+ ions doping on microstructure, optical, magnetic and mo¨ssbauer spectral properties of sol-gel synthesized BaM hexagonal ferrite based nanomaterials
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Rohit Jasrotia, Virender Pratap Singh, Rajesh Kumar, Kirti Singha, Monika Chandel, Mahavir SinghAbstractPrecise studies of cadmium and indium doped barium hexagonal ferrites having chemical composition Ba0.7Nd0.3Cdx/2Inx/2Fe12-xO19 (x = 0.0, 0.1, 0.2, 0.3) have been performed by sol-gel auto-combustion method in which ethylene glycol was used as a gel precursor. The structural, morphological, optical, elemental and magnetic properties have been studied by using various techniques like XRD, FESEM, FTIR, EDS and VSM. The XRD patterns shows charac...
Source: Results in Physics - February 16, 2019 Category: Physics Source Type: research

Visible light driven degradation of brilliant green dye using titanium based ternary metal oxide photocatalyst
We report a novel copper and cobalt impregnated titanium based ternary metal oxide nanocomposite (CuCO0.5Ti0.5O2) synthesized via simple chemical method. X-ray diffraction pattern and SAED pattern reveals the well crystallinity (R3̃m space group) and phase purity of the synthesized sample. TEM micrograph shows the nano size and heterostructure of the product. Nanoporous nature of the synthesized product is observed from BET analysis. The incorporation of the copper and cobalt in titanium oxide nanoparticle host modifies the band gap of the host and a broadband absorption spectrum (∼325 nm to 800 nm) of the nanocom...
Source: Results in Physics - February 15, 2019 Category: Physics Source Type: research

Characteristics of L-band radio frequency interference detected via the soil moisture active passive radiometer in China and its offshore areas
This study analyzes the brightness temperature and RFI acquired by the soil moisture active passive (SMAP) satellite L-band radiometer over China and its offshore areas, revealing that the RFI distribution is uneven. In China, RFI is mainly concentrated in the urban agglomerations and their surrounding areas. Further, RFI and population density show strong positive correlation. A comparison of the radiometer antenna brightness temperature data and the data after RFI detection and mitigation shows that the volume of the detected RFI is ∼1.4 K and the standard deviation is 6.5. Under the influence of RFI, different ban...
Source: Results in Physics - February 15, 2019 Category: Physics Source Type: research