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

Investigation of surface plasmons in Kretschmann structure loaded with a silver nano-cube
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Xiangxian Wang, Xuelin Bai, Zhiyuan Pang, Hua Yang, Yunping QiAbstractA composite structure based on a Kretschmann structure loaded with silver nano-cube is proposed. A 442-nm laser was used to excite surface plasmons in the composite structure, and the electric field enhancement was numerically simulated using the finite element method. The excitation angles of surface plasmons under conditions of different thicknesses of a PMMA film were obtained by studying the reflection spectrum of the Kretschmann structure. By examining the extinction spectra...
Source: Results in Physics - February 15, 2019 Category: Physics Source Type: research

Initial conditioning of a polymer electrolyte fuel cells: The relationship between microstructure development and cell performance, investigated by small-angle neutron scattering
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Satoru Ueda, Satoshi Koizumi, Yasuyuki TsutsumiAbstractReal time in-situ observation by small-angle neutron scattering (SANS) was performed to observe the development of microstructure in a polyelectrolyte membrane packed in a polymer electrolyte fuel cell (PEFC) during initial conditioning. By utilizing the excellent penetrability of neutrons, an operating fuel cell was studied. SANS originating from the membrane was analyzed to determine the water cluster radius (Rc) and its number density (ρc). We found that Rc increased and ρc decreased...
Source: Results in Physics - February 15, 2019 Category: Physics Source Type: research

Developing a new approaching technique of homotopy perturbation method to solve two-group reflected cylindrical reactor
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Mohammed ShqairAbstractThe solution of neutron diffusion equation is important to describe the behavior of the neutrons in the nuclear reactors. The essential cylindrical reactor geometry will be studied in this work, where the reactor reflector part is added to the core part to minimize its critical radius, and the neutrons diffuse in two different velocities. The massive results when diversification of the appropriate new approaching technique of homotopy perturbation method (HPM) represent its flexibility and suitability to deal with different n...
Source: Results in Physics - February 15, 2019 Category: Physics Source Type: research

Decoherence as a sequence of entanglement swaps
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Chris FieldsAbstractStandard semi-classical models of decoherence do not take explicit account of the classical information required to specify the system - environment boundary. I show that this information can be represented as a finite set of reference eigenvalues that must be encoded by any observer, including any apparatus, able to distinguish the system from its environment. When the information required for system identification is accounted for in this way, decoherence can be described as a sequence of entanglement swaps between reference a...
Source: Results in Physics - February 15, 2019 Category: Physics Source Type: research

Porous Cu-Mn-O catalysts fabricated by spray pyrolysis method for efficient CO oxidation
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Yang Zhou, Xiaoyuan Liu, Ke Wang, Jing Li, Xinglai Zhang, Xin Jin, Xinyue Tang, Xiuhui Zhu, Ruishi Zhang, Xin Jiang, Baodan LiuAbstractSeries of “Hopcalite” catalysts for low-temperature CO oxidation are prepared through a facile ultra-sonic spray pyrolysis approach. It has been found that the spray pyrolysis temperature and Cu/Mn atomic ratio in initial precursors show significant impacts on the catalytic activity of Cu-Mn-O catalysts. The catalyst synthesized at 550 °C with Cu/Mn = 1/2 in precursor (Cu1Mn2-550) shows the hig...
Source: Results in Physics - February 15, 2019 Category: Physics Source Type: research

An applicable count rate saturation correction approach on gamma camera for I-131 labeled radiopharmaceuticals
ConclusionsWe concluded that in high-administered activity, it is possible to determine actual count rate of the system in saturation areas. Operation and accuracy of our gamma camera were determined for high activities of iodine-131, which can contribute to various applications of dosimetry in different fields. (Source: Results in Physics)
Source: Results in Physics - February 15, 2019 Category: Physics Source Type: research

Low temperature thermoluminescence of Gd2O3 nanoparticles using various heating rate and Tmax − Texc. methods
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Serdar Delice, Mehmet Isik, Nizami M. GasanlyAbstractThermoluminescence (TL) measurements for Gd2O3 nanoparticles were carried out for various heating rates between 0.3 and 0.8 K/s at low temperatures (10–280 K). TL spectrum exhibited two observable and one faint peaks in the temperature region of 10–100 K, and four peaks in the temperature region of 160–280 K. Heating rate analysis was achieved to understand the behaviors of trap levels. It was seen that the peak maximum temperatures and TL intensities of all peaks increa...
Source: Results in Physics - February 14, 2019 Category: Physics Source Type: research

Investigation of non linear dynamics of an excitable magnetron sputtering plasma
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Gopikishan Sabavath, Pankaj Kumar Shaw, A.N. Sekar Iyengar, I. Banerjee, S.K. MahapatraAbstractIn this paper nonlinear dynamical behaviour of an excitable DC magnetron sputtering plasma has been investigated. Initially, plasma exhibited fixed point dynamics whereas with the increase in the discharge voltage, spikes were observed in the floating potential fluctuations. Furthermore, the increasing of discharge voltage resulted the increase in spikes. Power spectrum plot, normalized variance, recurrence plot and Hurst exponent are employed to extract ...
Source: Results in Physics - February 14, 2019 Category: Physics Source Type: research

Fabrication and characterization of Manganese–Zinc Ferrite nanoparticles produced utilizing heat treatment technique
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Naif Mohammed Al-Hada, Halimah Mohamed Kamari, Abdul H. Shaari, Elias SaionAbstractIn this research, the thermal treatment technique has been employed to produce Mn0.5Zn0.5Fe2O4 nanoparticles. Manganese, Zinc and iron nitrates have been mixed with capping agent of polyvinylpyrrolidone. Several techniques have been used to examine the structural, morphological and optical properties of the prepared product. X-ray diffraction (XRD) has demonstrated the prepared product and showed that the product contains tetragonal crystalline structures. Scanning e...
Source: Results in Physics - February 14, 2019 Category: Physics Source Type: research

Characterization of stress softening and self-healing in a double network hydrogel
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): İsmail Doğan KülcüAbstractIn this paper, a micro-mechanically based constitutive model is presented to describe stress softening and self-healing in alginate-polyacrylamide (PAAm) double network (DN) hydrogels. The stress softening phenomenon in alginate-PAAm DN hydrogels under cyclical deformation is assumed to be the result of the rupture of chain linkages. Therefore, the network evolution method [Dargazany and Itskov, International Journal of Solids and Structures, 2009, 46, 2967] is used to characterize stress softening. The polymer...
Source: Results in Physics - February 14, 2019 Category: Physics Source Type: research

Propagation dynamics of mixed-pattern solitons in strongly nonlocal nonlinear media
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Shuai Jia, Li-Min Song, Zhen-Jun Yang, Zhao-Guang Pang, Xing-Liang Li, Shu-Min ZhangAbstractThis paper mainly investigated the propagation dynamics of the mixed-pattern solitons in strongly nonlocal nonlinear media. The propagation expression of the mixed-pattern soliton is derived, and its propagation characteristics are analyzed, including the evolution of the on-axis light intensity, the contour intensity distributions and the second-order moment beam width. It is found that the evolution behavior of the mixed-pattern soliton is periodic, which ...
Source: Results in Physics - February 14, 2019 Category: Physics Source Type: research

Analysis of Nd3+ concentration on the structure, morphology and photoluminescence of sol-gel Sr3ZnAl2O7 nanophosphor
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): M.R. Mhlongo, L.F. Koao, T.E Motaung, R.E. Kroon, S.V. MotloungAbstractNeodymium activated strontium zinc aluminate (Sr3ZnAl2O7:x%Nd3+) nanophosphor was synthesized using the sol-gel technique whereby the Nd3+ concentration was varied in the range 0 ≤ x ≤ 2. The effect of Nd3+ concentration on the structure, particle morphology and photoluminescence properties of Sr3ZnAl2O7 were investigated. The X-ray diffraction (XRD) results revealed that all samples resembled the mixture of both ZnAl2O4 and Sr3Al2O6 cubic structures. Nd3+ doping i...
Source: Results in Physics - February 13, 2019 Category: Physics Source Type: research

The investigation of gamma-ray and neutron shielding parameters of Na2O-CaO-P2O5-SiO2 bioactive glasses using MCNPX code
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): H.O. Tekin, O. Kilicoglu, E. Kavaz, E.E. Altunsoy, M. Almatari, O. Agar, M.I. SayyedAbstractBioactive glasses are silicate glasses with sodium, calcium and phosphorus in its composition used to fulfill or support the functions of living tissues in the human body. The superiority of physical and mechanical properties of the bioactive glasses leads to the opportunity to use for radiation protection. From this point of view, radiation absorption parameters of nine bioactive glasses were reported in the present research. The mass attenuation coefficien...
Source: Results in Physics - February 13, 2019 Category: Physics Source Type: research

Potential problems on surfaces: With or without boundary, subjected to discrete distributed sources
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Ofer Eyal, Ayelet GoldsteinAbstractIn this paper we derive analytical solutions for potential problems on different types of surfaces, such as cylinders, cones and spheres.These solutions complement the solution obtained for a sphere. Besides examining modes of truncation for a sphere, we also provide a complete coverage of all modes of truncation for cylinders and cones.Our interest focuses on two-dimensional conducting surfaces, that are fed with point sources of current. Our solution gave explicitly the voltage distribution on these surfaces, re...
Source: Results in Physics - February 12, 2019 Category: Physics Source Type: research

Laser-based investigation into injection, formation and flow processes of ethanol films on metal surface
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Huinan Yang, Yufeng Guo, Yong Jiang, Jingjing Chen, Mingxu Su, Zhihai JiaAbstractDynamic liquid films exist widely in various industrial processes, and the investigations into these films with high temporal and spatial resolution are of great significances to understand the formation mechanisms and flow characteristics of liquid films, as well as to optimize relevant processes. Since ethanol is often used as a diluent for the film-forming substance in the coating process, it was chosen as research object here. In the work, the absorption spectrum o...
Source: Results in Physics - February 12, 2019 Category: Physics Source Type: research

Exploring the evolution of asymmetric pattern of mask hole during plasma etching process by particle simulation method
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Peng ZhangAbstractDamage on the mask surface caused by charging effect during plasma etching process continues to attract much attention currently. It has been observed that the round shape of holes in a mask can also be etched into the asymmetric shape due to factors, such as non-uniform plasma source and incline or vibration of sample platform, etc. This work further aims to explore the charging effect when the round shaped holes in a mask has been changed as asymmetric shaped ones by particle simulation method. The distribution of electric field...
Source: Results in Physics - February 12, 2019 Category: Physics Source Type: research

Development of spark plasma sintered TiAlSiMoW multicomponent alloy: Microstructural evolution, corrosion and oxidation resistance
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): L. Rudolf Kanyane, A. Patricia Popoola, Nicholus MalatjiAbstractTiAlMoSiW high entropy alloy was fabricated using spark plasma sintering under different sintering temperatures. The microstructural and morphological characteristics of the alloy were investigated using X-ray diffractometry (XRD) and scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS). The mechanical and corrosion properties of the alloy were tested using diamond base indentor and potentiodynamic polarization. Thermogravimetric analysis and density me...
Source: Results in Physics - February 12, 2019 Category: Physics Source Type: research

Influence of 1.25 MeV gamma rays on optical and luminescent features of Er3+ doped zinc bismuth borate glasses
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Vinod Hegde, Nimitha Prabhu, Akshatha Wagh, M.I. Sayyed, O. Agar, Sudha D. KamathAbstractGlasses based on 10ZnO-5Na2CO3-10Bi2O3-(75-x)B2O3-xEr2O3 with x = (0, 0.1, 0.3, 0.5, 0.7, 1.0) mol%, were synthesized by melt quenching technique and characterized through optical and luminescent features, before and after irradiating them with high energy (1.25 MeV) gamma rays. The amorphous nature of the glasses and the presence of various structural groups like BiO6, BO3 and BO4 were confirmed through XRD and FTIR measurements. Optical properties were st...
Source: Results in Physics - February 12, 2019 Category: Physics Source Type: research

Energy transfer between Ce and Sm co-doped YAG nanocrystals for white light emitting devices
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Hanan Ali, Mohamed Atta KhedrAbstractThis work reports on the optical response of Ce and Sm co-doped in YAG nanocrystals prepared by co-precipitation method. The X-ray diffraction (XRD) and scanning electron microscope (SEM) evidenced the preparation of (Ce, Sm) co-doped YAG nanocrystals. The photoluminescence (PL) and the photoluminescence excitation (PLE) were used to characterize the optical response and the energy transfer mechanism. It is found that energy transfer from Ce to Sm is achieved efficiently via certain excitation wavelengths. Tunin...
Source: Results in Physics - February 12, 2019 Category: Physics Source Type: research

Grease-like coupling agent based on metal ionization method for low-frequency ultrasonic NDT
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Lei Zhang, Yuan Yang, Xiaoliang Yang, Xiaoyuan WeiAbstractIn long-distance NDT based on ultrasonic guided waves with low-frequency excitation, the most commonly used industrial coupling agents are grease-like coupling agents. However, these agents show the poor performance in NDT, because they can cause more acoustic energy loss and lower acoustic transmissivity. In the study, to improve the acoustic transmission property of grease-like coupling agents, a new method was proposed to combine different metal ions like Li+, Na+ and Ca2+ with base greas...
Source: Results in Physics - February 12, 2019 Category: Physics Source Type: research

Synthesis of a Cr-Cu surface alloy using a low-energy high-current electron beam
Publication date: Available online 10 February 2019Source: Results in PhysicsAuthor(s): Alexey Markov, Evgenii Yakovlev, Daria Shepel', Massimiliano BestettiAbstractA Cr-Cu surface alloy is synthesized using successive operations of Cr film deposition followed by mixing in a melted phase with the Cu substrate by a low-energy, high-current electron beam (LEHCEB). The parameters of LEHCEB are as follows: electron energy 20-30 keV and pulse duration 2-4 μs. Depending on the LEHCEB energy density, the concentration of Cr in the alloy is in the range from 60 to 20 at%. The alloy microstructure has been analyzed, an...
Source: Results in Physics - February 11, 2019 Category: Physics Source Type: research

Corrosion behavior of Al2CrFeCoxCuNiTi high-entropy alloy coating in alkaline solution and salt solution
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Xing-wu QiuAbstractThe Al2CrFeCoxCuNiTi high-entropy alloy coatings were prepared by laser cladding. The microstructure of the coatings was tested by micro analysis instrument. Electrochemical properties of coating and matrix were tested by electrochemical analysis instrument. The results show that the cladding zone is mainly composed of equiaxed grains, as well as fine particles and white “fishbone” grains distributed in the matrix grains. The corrosion resistance of Al2CrFeCoxCuNiTi coatings is excellent in 1 mol/L NaOH and 3.5 wt...
Source: Results in Physics - February 11, 2019 Category: Physics Source Type: research

Numerical study of cavitation in centrifugal pump conveying different liquid materials
Publication date: Available online 8 February 2019Source: Results in PhysicsAuthor(s): Song-Sheng Deng, Guo-Dong Li, Jin-Fa Guan, Xao-Chen Chen, Lu-Xing LiuAbstractA numerical study on cavitation in the centrifugal pump during the transportation of pure water and diesel is carried out. An improved cavitation model based on the Zwart−Gerber−Belamri Model is employed in the simulation. A Cash−Karp fourth−fifth order Runge−Kutta method was used to solve the original Rayleigh-Plesset equation to get the numerical solution. The effects from viscosity and surface tension on bubbles’ expansion ...
Source: Results in Physics - February 10, 2019 Category: Physics Source Type: research

Singular solitons in the pseudo-parabolic model arising in nonlinear surface waves
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Onur Alp Ilhan, Alaattin Esen, Hasan Bulut, Haci Mehmet BaskonusAbstractThis manuscript aims to construct a family of travelling wave solutions to the high nonlinearity differential equation for obtaining new hyperbolic function solutions by using an analytical method, which is based on the exponential function. A number of new hyperbolic solutions for the model have been newly derived by using the method. We take advantage of some computer programming for all numerical calculations, and surfaces of solutions obtained in this paper. (Source: Results in Physics)
Source: Results in Physics - February 10, 2019 Category: Physics Source Type: research

Physical properties enhancement of porous silicon treated with In2O3 as a antireflective coating
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Afef Harizi, Fakher Laatar, Hatem EzzaouiaAbstractIn this work, we investigate the effect of Indium Oxide (In2O3) on the microstructural, optical, optoelectrical, and electrical properties of Porous Silicon (PS) layer. PS film was prepared by electrochemical anodization technique. In2O3 thin film was coated onto PS layer by using simple chemical immersion method. The investigation showed a significant enhancement in the optoelectronic property of PS coated with In2O3. The In2O3/PS layer was thermally annealed to improve the efficiency of the photov...
Source: Results in Physics - February 10, 2019 Category: Physics Source Type: research

Tuning the electronic band alignment properties of TiO2 nanotubes by boron doping
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Shivani Singh Surah, Manoj Vishwakarma, Ritesh Kumar, Ratyakshi Nain, Sidhharth Sirohi, Gulshan KumarAbstractThe present study highlights the significant impact of trace level doping of boron in titanium dioxide (TiO2) nanotubes by investigating the structural, optical and electronic properties of samples, TNT and B-TNT. TEM analysis of boron-doped sample confirms the formation of crystalline nanotube structures and the trace level quantification of boron was confirmed by XPS analysis, where B shows feature of Ti–O–B bonding. Raman anal...
Source: Results in Physics - February 10, 2019 Category: Physics Source Type: research

Investigation of GeSn/Ge quantum dots’ optical transitions for integrated optics on Si substrate
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Mourad Baira, Maha Aljaghwani, Bassem Salem, Niyaz Ahmad Madhar, Bouraoui IlahiAbstractThe effects of self-organized GeSn/Ge quantum dot’s size and shape on the direct band gap interband emission energy, oscillator strength and radiative lifetime are evaluated. The electron’s and the hole’s confined energies and their corresponding wave function are driven by solving the 3D Schrodinger equation in Cartesian coordinates using the finite elements method. Dome and pyramidal shaped quantum dots are considered within practically exploi...
Source: Results in Physics - February 10, 2019 Category: Physics Source Type: research

Enhancement of optoelectronic properties of TiO2 films containing Pt nanoparticles
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Limny Esther Pérez-Jiménez, Juan Carlos Solis-Cortazar, Lizeth Rojas-Blanco, Germán Perez-Hernandez, Omar S. Martinez, Roger C. Palomera, F. Paraguay-Delgado, I. Zamudio-Torres, Erik R. MoralesAbstractAnatase TiO2 and TiO2 films containing Pt nanoparticles were prepared by sol–gel dip coating method and characterized by X-ray diffraction (XRD), atomic force microscopy, scanning electron microscopy and transmission electron microscopy. Further, optoelectronic properties were investigated, showing that for anatase TiO2 film...
Source: Results in Physics - February 9, 2019 Category: Physics Source Type: research

Enhancing the structural, optical and electrical properties of ZnO nanopowders through (Al + Mn) doping
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Chedia Belkhaoui, Nissaf Mzabi, Hichem Smaoui, Philippe DanielAbstractUndoped ZnO and Zn0.97−xAl0.03MnxO (x = 0, 1, 2 and 3%) nanopowders (NPs) were synthesized by co-precipitation method. They were characterized by X-ray diffraction (XRD), Fourier transformed infrared (FTIR), Raman, UV–visible, photoluminescence (PL) and impedance spectroscopies. All samples exhibit a single phase wurtzite type. The average crystallite size lying between 22 and 42 nm was found to increase for all doped ZnO samples. The optical transmission in the...
Source: Results in Physics - February 9, 2019 Category: Physics Source Type: research

Numerical based study on charge density wave dynamics in a one-dimensional conductor in the low temperature limit
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): R. Essajai, O. Idrissi, A. Mortadi, N. Hassanain, A. MzerdAbstractUnderstanding how the temperature affects in a wide range of quasi-one-dimensional conductors is one of the most significant scientific challenges in solid state physics. In this paper, the temperature-dependent charge density wave (CDW) dynamic properties of a one-dimensional conductor in the weak pinning limit was studied within the temperature limit of 0–1 K. To do so, a model which incorporates the essential feature of the Fukuyama–Lee–Rice (FLR) model of CDW&...
Source: Results in Physics - February 8, 2019 Category: Physics Source Type: research

Alcoholic extracts from Paulownia tomentosa leaves for silver nanoparticles synthesis
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Yosari S. Pontaza-Licona, A.L. Ramos-Jacques, J.A. Cervantes-Chavez, J. Luis López-Miranda, Álvaro de Jesús Ruíz-Baltazar, J. Maya-Cornejo, Angel L. Rodríguez-Morales, R. Esparza, M Estevez, R. Pérez, A.R. Hernandez-MartínezAbstractPaulownia tomentosa (P. tomentosa) is a hardwood tree that has economic and scientific relevance but has no use as food. For that reason, we selected it to conduct a study on the synthesis of silver nanoparticles (AgNPs) using hydroalcoholic extracts from its leaves. Phyto...
Source: Results in Physics - February 8, 2019 Category: Physics Source Type: research

Thermal expansion properties of the polycaprolactam nanocomposites reinforced with single-walled carbon nanotubes
The objective of this research is to provide methods for fabricating carbon nanotube reinforced polymer nanocomposites with very low coefficients of thermal expansion. The thermal expansion properties of polycaprolactam nanocomposites prepared with different levels of thermal histories were investigated to gain a better understanding of the morphology-property relationships. The effects of carbon nanotube loading and aspect ratio on the thermal expansion behavior of the polymer nanocomposites were evaluated. The results indicated that the loading and aspect ratio of carbon nanotubes have a significant effect on the thermal...
Source: Results in Physics - February 7, 2019 Category: Physics Source Type: research

Enhanced dielectric properties of prospective Bi0.85Gd0.15Fe1−xCrxO3 multiferroics
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): M.A. Matin, M.N. Hossain, M.A. Ali, M.A. Hakim, M.F. IslamAbstractScientific endeavor for tailoring properties of functional materials offers a significant urge to material scientists. The driving force is to facilitate the current understanding that may create new pathway to alternative materials. BiFeO3 is inherently multiferroic and its exploitation for applications in diversified fields are still required extensive investigations in different perspectives. In this context, we synthesized new Bi0.85Gd0.15Fe1−xCrxO3 multiferroics prepared b...
Source: Results in Physics - February 7, 2019 Category: Physics Source Type: research

Effect of various parameters on the microstructure and magnetic properties of sintered Sr-hexaferrite
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Sanam Garehbaghi, Abbas KianvashAbstractSr-hexaferrite powders with Fe/Sr molar ratio of 11 was synthesized via conventional ceramic route. Powders were milled for 5–25 h, then pressed to make green compacts by applying a pressure of 100–400 MPa. In other series, K2CO3 was used in starting materials. K2CO3/SrCO3 mixing molar ratio was 0.05 and 0.5. First series were calcined at 1250 °C, and the second series were calcined at 1000 °C for 2 h. The XRD characterization results revealed Sr-hexaferrite structure has been pr...
Source: Results in Physics - February 6, 2019 Category: Physics Source Type: research

An empirical potential energy function for the interactions between rare gas atoms
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): Bo Song, Min YangAbstractA new potential model was developed in this work by the modification of the repulsive part of the Tang-Toennies model. The proposed potential function was used in this work to investigate the interactions between both like and unlike rare gas atoms. The considered systems are He2, Ne2, Ar2, and Kr2 for the like interactions and HeNe, HeAr, and HeKr for the unlike interactions. The potential parameters in the repulsive part of each system were determined from the recent literature values of the equilibrium distance Re, the w...
Source: Results in Physics - February 6, 2019 Category: Physics Source Type: research

Characterisation of titanium oxide layers using Raman spectroscopy and optical profilometry: Influence of oxide properties
This study evaluates the use of a combination of Raman spectroscopy and optical profilometry as a surface characterisation technique for the examination of oxide layers grown on titanium metal substrates. The titanium oxide layers with thickness of up to 8 µm, were obtained using a low-pressure oxygen microwave plasma treatment of the titanium metal substrate. The effect of the microwave plasma processing conditions (input power, pressure and treatment time) on the Raman bandwidth, intensity and peak position was evaluated. Also, the effect of these processing conditions on the surface roughness parameters (Sa, Sdq...
Source: Results in Physics - February 6, 2019 Category: Physics Source Type: research

Doping the bismuth into the host’s Cu2ZnSnS4 semiconductor as a novel material for thin film solar cell
In this report for the first time, the Cu2Zn1-xBixSnS4 (CZBiTS) semiconductor at (0 ≤ x ≤ 1) has been synthesized using the solvothermal and spin coating methods. The structural, optical, morphological and electrical properties of CZBiTS semiconductor were investigated. It was found that the Cu2BiSnS4 (x = 1) (CBiTS) thin film was better than the Cu2ZnSnS4 (x = 0) (CZTS) and CZBiTS (x = 0.25, 0.5 and 0.75) thin films due to its optimum features like higher absorption coefficient (>104 cm−1), higher optical conductivity, lower transmittance and lower band gap (1.25 eV). Furthermore, th...
Source: Results in Physics - February 6, 2019 Category: Physics Source Type: research

Preparation and performances of Ni-Fe/CrNx dual layer coatings for ferritic stainless steel interconnects
Publication date: March 2019Source: Results in Physics, Volume 12Author(s): P.F. You, X. Zhang, X.G. Yang, H.L. Zhang, L.X. Yang, C.L. ZengAbstractDual layer coatings CrNx and Ni-Fe alloy have been developed for metallic interconnects application by a combined approach. The CrNx layer was deposited on ferritic stainless steel using multi-arc ion plating, and the Ni-Fe alloy coating was electroplated on the CrNx coated steel subsequently. After oxidation at 800 °C in air for 5 h, a multi-layer scale composed of NiFe2O4, Cr2O3, Ni-Fe-Cr alloy and CrNx from outside to inside was formed on the CrNx/substrate with a 1.6...
Source: Results in Physics - February 6, 2019 Category: Physics Source Type: research