Density functional investigations on the adsorption characteristics of nucleobases on germanene nanoribbons
Publication date: Available online 13 October 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Azadeh Ayatollahi, Mahmood Rezaee Roknabadi, Mohammad Behdani, Nasser Shahtahmassebi, Biplab SanyalAbstractIn order to explore the possibility of using 2D nanostructures as biosensors, we have studied the adsorption characteristics of nucleotide bases on armchair germanene nanoribbon (AGeNR) using density functional theory with several approximations of exchange-correlation functionals with the addition of dispersion correction. It has been found that the dispersion interactions have the key role in cha...
Source: Physica E: Low dimensional Systems and Nanostructures - October 15, 2019 Category: Nanotechnology Source Type: research

Electrical spin switch in a two-electron triangular graphene quantum dot
Publication date: Available online 11 October 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Qingrui DongAbstractWe study a triangular graphene quantum dot with two electrons filled in the degenerate shell. The electronic structures of the dot are calculated as a function of an electric field using a combination of tight-binding, Hartree–Fock and exact-diagonalization methods. To use the total spin ( S) of the dot as a qubit, we pay attention to the energy difference between the lowest S=0 and S=1 states. The energy difference increases unexpectedly up to a rather large value before a cro...
Source: Physica E: Low dimensional Systems and Nanostructures - October 12, 2019 Category: Nanotechnology Source Type: research

Bound states of (2+1)−dimensional massive Dirac fermions in a Lorentzian-shaped inhomogeneous perpendicular magnetic field
Publication date: Available online 11 October 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Dai-Nam Le, Phong-Su Luu, Thanh-Sang Ha, Ngoc-Hung Phan, Van-Hoang LeAbstractIn this paper, we investigate massive Dirac fermions in (2+1)−spacetime confined by a Lorentzian-shaped inhomogeneous magnetic field and construct solutions of their bound states by both analytical and numerical methods. First, we have found a set of specific magnetic fields which allow obtaining conditionally exact solutions as well as quasi-exact ones. Second, we construct these analytical solutions explicitly and analy...
Source: Physica E: Low dimensional Systems and Nanostructures - October 12, 2019 Category: Nanotechnology Source Type: research

Electronic property of bilayer graphene on pristine and rhenium-doped MoS2
Publication date: Available online 11 October 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Mei-Yan Ni, Na Jiao, Mengmeng Zheng, Shoubao ZhangAbstractFirst-principles calculation has been performed to investigate the electronic structure of bilayer graphene (BLG) on MoS2 layer with and without rhenium(Re) atom substitution. The results show that the band gap of MoS2/BLG is 30 meV and is enlarged to 98 meV with the substitution of molybdenum (Mo) atom by Re atom in MoS2. By analyzing the difference change density of the two systems, the existence of MoS2 causes the inequivalent charge distribut...
Source: Physica E: Low dimensional Systems and Nanostructures - October 12, 2019 Category: Nanotechnology Source Type: research

Few-layer MoS2 Dendrites as a Highly Active Humidity Sensor
This study introduces an improved chemical vapor deposition method to grow dendritic MoS2 nanomaterials. The grown MoS2 crystals have a dendritic shape with fractal and schedulable patterns. These morphologies are mainly initiated from the growth of double defects, and are regulated by S: Mo vapor ratio by characterizing their atomic structure. This study enhances the understanding of the growth mechanism of twin-derived crystals, extends their application from nanomaterials to 2D crystals, and provides a powerful and controllable method for small transition metal sulfide TMDCs. Shape engineering methods in electrochemical...
Source: Physica E: Low dimensional Systems and Nanostructures - October 12, 2019 Category: Nanotechnology Source Type: research

Adsorption of small gas molecules on transition metal (Fe, Ni and Co, Cu) doped graphene: A systematic DFT study
Publication date: Available online 10 October 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Jiaming Ni, Mildred Quintana, Shaoxian SongAbstractWe predict the CO2, NO, NO2 and SO2 gas molecule absorption and sensing performance of transition metal (Fe, Ni, Co and Cu) doped graphene by a systematic density functional theory (DFT) study. Our results demonstrate that graphene doped with different transition metal atoms produces completely different adsorption behaviors of small gas molecules originated from changes in the electronic structure of the systems under strain. Graphene doped with Fe ato...
Source: Physica E: Low dimensional Systems and Nanostructures - October 12, 2019 Category: Nanotechnology Source Type: research

Flexible GO-CoPc and GO-NiPc nanocomposite electrodes for hybrid supercapacitors
This study reveals new high potential materials with high active surface area, low resistance and long cycle-life (aqueous media) features for pseudocapacitors. (Source: Physica E: Low dimensional Systems and Nanostructures)
Source: Physica E: Low dimensional Systems and Nanostructures - October 12, 2019 Category: Nanotechnology Source Type: research

Asymmetric nonlocal signal induced by thermoelectric effects in a lateral spin valve
Publication date: Available online 9 October 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Nagarjuna Asam, Taisei Ariki, Takashi KimuraAbstractWe demonstrate that the heat flow arising from the Joule heating produces not only the conventional thermal spin injection but also additional thermo-electric effects both in current and voltage probes. The excellent thermal spin injection property for the CoFeAl enables us to distinguish the ordinal thermal spin valve signal and the unconventional asymmetric field dependence in the nonlocal 2nd harmonic signal. We show that the observed unique field de...
Source: Physica E: Low dimensional Systems and Nanostructures - October 10, 2019 Category: Nanotechnology Source Type: research

The transition from double to single quantum dot induced by THz laser field
Publication date: Available online 9 October 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): M.G. Barseghyan, H.M. Baghramyan, A.A. Kirakosyan, D. LarozeAbstractThe combined influence of an intense laser field and a homogeneous magnetic field is considered on laterally coupled double quantum dot with isotropic and anisotropic parabolic confinement. It is shown that intense laser field can recover typical properties to a single quantum dot: it creates Fock–Darwin states in a double quantum dot with anisotropic confinement. Also, the laser and the magnetic field effects on the intraband abso...
Source: Physica E: Low dimensional Systems and Nanostructures - October 10, 2019 Category: Nanotechnology Source Type: research

Spin-dependent electronic lenses based on hybrid graphene nanostructures
Publication date: Available online 9 October 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Yuriko Baba, Marta Saiz-BretínAbstractWe study electronic transport in graphene/ferromagnetic insulator hybrid devices. The system comprises an armchair graphene nanoribbon with a lens-shaped EuO ferromagnetic insulator layer deposited on top of it. When the device supports a large number of propagating modes, the proximity exchange interaction of electrons with the magnetic ions of the ferromagnetic insulator results in electrons being spatially localised at different spots depending on their spi...
Source: Physica E: Low dimensional Systems and Nanostructures - October 10, 2019 Category: Nanotechnology Source Type: research

Mo2TiC2O2 MXene-based nanoscale pressure sensor
Publication date: February 2020Source: Physica E: Low-dimensional Systems and Nanostructures, Volume 116Author(s): Ünal Özden Akkuş, Erdem Balcı, Savas BerberAbstractWe propose Mo2TiC2O2-based quantum transport device as a pressure sensor. Using non-equilibrium Green’s function technique, we have investigated the current–voltage characteristics of Mo2TiC2O2-based nanodevice under pressure. In a compressed double MXene, the electronic states originating from the two different transition metals are shifted up unequally. Thus, the character of VBM changes drastically after a critical compression. The p...
Source: Physica E: Low dimensional Systems and Nanostructures - October 10, 2019 Category: Nanotechnology Source Type: research

Mo2TiC2O2 MXene–based nanoscale pressure sensor
Publication date: Available online 3 October 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Ünal Özden Akkuş, Erdem Balcı, Savas BerberAbstractWe propose Mo2TiC2O2-based quantum transport device as a pressure sensor. Using non-equilibrium Green’s function technique, we have investigated the current–voltage characteristics of Mo2TiC2O2-based nanodevice under pressure. In a compressed double MXene, the electronic states originating from the two different transition metals are shifted up unequally. Thus, the character of VBM changes drastically after a critical compression....
Source: Physica E: Low dimensional Systems and Nanostructures - October 5, 2019 Category: Nanotechnology Source Type: research

A comparative study of substrates disorder on mobility in the Graphene nanoribbon: Charged impurity, surface optical phonon, surface roughness
Publication date: Available online 4 October 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Shoeib Babaee Touski, Manouchehr HosseiniAbstractThe effects of substrate on the electronic properties of Graphene remains unclear. Many theoretical and experimental efforts have been done to clarify this discrepancy. In this work, we studied the electronic transport in armchair Graphene nanoribbons (AGNR) in the presence of substrate’s disorder. The three main substrate’s disorders -surface roughness, charged impurity and surface optical phonon-are investigated. Non-Equilibrium Green’s...
Source: Physica E: Low dimensional Systems and Nanostructures - October 5, 2019 Category: Nanotechnology Source Type: research

Cobalt doped magnetite nanoparticles: Synthesis, characterization, optimization and suitability evaluations for magnetic hyperthermia applications
Publication date: Available online 1 October 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Zeinab Erfani Gahrouei, Sheyda Labbaf, Ahmad KermanpurAbstractCobalt doped magnetite nanoparticle (CoxFe3-xO4 NPs) is synthesized using different amount of cobalt (x = 0, 0.3, 0.6 and 1) and reducing agent (0.5, 2.5, 4.5 and 6.5 mmol), at various pH levels (9.5, 10.5 and 11.5). The concentration of reducing agent and pH had an effect on obtaining pure spherical magnetic NPs. Also, the amount of cobalt ion in CoxFe3-xO4 spinel ferrite had a significant effect on specific loss power (SLP) and intrins...
Source: Physica E: Low dimensional Systems and Nanostructures - October 2, 2019 Category: Nanotechnology Source Type: research

Comptibility of optical transparency and microwave absorption in C-band for the metamaterial with second-order cross fractal structure
Publication date: Available online 30 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Dongyong Shan, Longhui He, Lianwen Deng, Heng Luo, Congwei Liao, Yuhui Peng, Yunchao Xu, Shengxiang HuangAbstractAn optically transparent metamaterial absorber (MMA) operated in the C-band (4-8 GHz) is optimally designed based on the second-order cross fractal structure. The experimental results show that the reflection loss of the proposed MMA is lower than -10 dB from 3.98 GHz to 8.68 GHz. Two overlapped resonances located at 4.77 GHz and 7.33 GHz, respectively, are caused by the second-order cross ...
Source: Physica E: Low dimensional Systems and Nanostructures - September 30, 2019 Category: Nanotechnology Source Type: research

Co-modulation of graphene by N hetero-doping &vacancy defects and the effect on NO2 adsorption and sensing: First-principles study
Publication date: Available online 28 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Yuxiang Qin, Zhen ZhangAbstractModulation by hetero-doping or vacancy defect has been proved effective on gas-sensing response enhancement of intrinsic graphene. To explore the synergistic effect of hetero-doping and vacancy defects, in this work, the adsorption of NO2 molecule on the defective graphene co-modulated with N-doping and C-vacancy was studied using first-principles calculations. The doping&vacancy models of defective graphene were constructed by creating single/double C-vacancies with...
Source: Physica E: Low dimensional Systems and Nanostructures - September 29, 2019 Category: Nanotechnology Source Type: research

Electronic and magnetic properties of 3d transition metal doped MoSe2 monolayer
Publication date: Available online 27 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Yi Tian, Zhipeng Zhu, Zhizhong Ge, An Sun, Quan Zhang, Songlei Huang, Hongping Li, Jian MengAbstractChemical doping represents one of the most effective methods to modulate promising performance of materials for practical applications. Here, the atomic structures and electronic properties of 3d transition metal Mn, Fe, Co, and Ni incorporated MoSe2 monolayer have been systematically investigated by using density functional theory calculations. Structural analyses indicate that all doped systems almost...
Source: Physica E: Low dimensional Systems and Nanostructures - September 29, 2019 Category: Nanotechnology Source Type: research

Dopant-induced magnetism in platinum telluride monolayer regulated by strain engineering
Publication date: Available online 27 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Yun Shan, Tinghui Li, Lizhe LiuAbstractPlatinum telluride (PtTe2), a new member of metallic noble-transition-metal dichalcogenides, attracts significant attention because of intriguing physical properties and applications in electronics, optoelectronics. However, the formation and regulation of magnetism as an important application for spin electronics have not been realized in PtTe2 monolayer so far. Herein, we report that the magnetism can be realized by doping nitrogen elements or introducing catio...
Source: Physica E: Low dimensional Systems and Nanostructures - September 29, 2019 Category: Nanotechnology Source Type: research

Landau–Zener transitions in coupled qubits: Effects of coloured noise
Publication date: Available online 27 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): I.F. Nyisomeh, J.T. Diffo, M.E. Ateuafack, L.C. FaiAbstractThe feasibility of stochastic Hamiltonians for interacting qubits to deliver consistent quantum speedups in quantum adiabatic optimization remains an open question. This paper studies theoretically the noisy Landau–Zener model of a system of two interacting qubits. Exact analytic results are obtained for all transition probabilities via nonstationary perturbation technique, even where semiclassical trajectories interfere. Where the syste...
Source: Physica E: Low dimensional Systems and Nanostructures - September 29, 2019 Category: Nanotechnology Source Type: research

Magnetic properties in Nb/Tc adsorbed gt-C3N4 monolayer
Publication date: Available online 27 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Ai-Ming Hu, Hai-Jun Luo, Wen-Zhi XiaoAbstractBasing on ab initio calculations, we investigate the electronic structures and magnetic properties of triazine-based graphitic carbon nitride (gt-C3N4) sheets with adsorbed by Nb and Tc. Both Nb and Tc atoms energetically prefer to be adsorbed on the cavity site. Adsorptions lead to total magnetic moments of 1.00 μB per Nb or Tc atom. The magnetic moments on Nb anti-ferromagnetically couples with those on C and N atoms, but the spins between Nb atoms str...
Source: Physica E: Low dimensional Systems and Nanostructures - September 29, 2019 Category: Nanotechnology Source Type: research

Excitonic states in spherical layered quantum dots
Publication date: Available online 27 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Mariano Garagiola, Omar OsendaAbstractThe properties of excitons formed in spherical quantum dots are studied using the k⋅p method within the Hartree approximation. The spherical quantum dots considered have a central core and several concentric layers of different semiconductor materials that are modeled as a succession of potential wells and barriers. The k⋅p Hamiltonian and the Coulomb equations for the electron–hole pair are solved using a self-consistent iterative method. The calc...
Source: Physica E: Low dimensional Systems and Nanostructures - September 29, 2019 Category: Nanotechnology Source Type: research

Solar Assisted Reduced Graphene Oxide as Adsorbent for Carbon dioxide and its Kinetic Studies
Publication date: Available online 26 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): L. Nagarajan, P. Sampath kumar, A. Arulraj, G. Senguttuvan, K. KumaraguruAbstractCombustion of fossil fuels is one of the major sources of greenhouse gas (GHG) carbon dioxide (CO2). The increasing concentration of CO2 in the atmosphere is considered to be one of the main causes of global warming. The commonly used techniques for carbon dioxide capture are absorption, cryogenic separation, adsorption, membrane separation and micro algal bio fixation. In this manuscript, solar reduced graphene oxide (SR...
Source: Physica E: Low dimensional Systems and Nanostructures - September 28, 2019 Category: Nanotechnology Source Type: research

Enhanced Raman spectra of hydrogenated Graphene on 4H-SiC(0001)
Publication date: Available online 26 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): K. Grodecki, J. Jagiełło, A. Dobrowolski, D. CzołakAbstractSilicon carbide is an interesting material for electrical applications and sensors. Epitaxial graphene is intercalated with hydrogen to weaken its interaction with the substrate and increase electrical properties. We use Raman spectroscopy to investigate graphene on SiC. It is fast and most important not destructive method. It allows us to determine numbers of graphene layer and it’s electrical properties based on energy G band and FW...
Source: Physica E: Low dimensional Systems and Nanostructures - September 28, 2019 Category: Nanotechnology Source Type: research

Interaction of nitrotyrosine with aluminum nitride nanostructures: A density functional approach
Publication date: Available online 26 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Zahra Rostami, Maryam Maskanati, Salah Khanahmadzadeh, Mohammad Dodangi, Milad NouralieiAbstractWe investigated the adsorption of nitrotyrosine on the AlN nanostructures including zero-dimensional nanocluster, one-dimensional nanotube, and two-dimensional nanosheet using density functional theory calculations. Density functional theory calculations were performed for calculation of adsorption energy, energy band gap, changes in the energy band gap, charge transfers, and nature of interactions; upon ad...
Source: Physica E: Low dimensional Systems and Nanostructures - September 28, 2019 Category: Nanotechnology Source Type: research

Designed synthesis of CuCo2O4 /CuO nano-composite as a potential anode material for lithium ion batteries
Publication date: Available online 27 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Anubha Tomar, Jay Singh, Satendra Pal Singh, Alok Kumar RaiAbstractA unique strategy has been designed to synthesize CuCo2O4/CuO nano-composite by using facile pyro-synthesis method. A pyro-synthesis is a well‒known method to carbon coat the nanomaterials without using any carbon source. The network of carbon formed during pyro-synthesis was eventually evaporated by calcination in air, which simultaneously led to the partial reduction of CuCo2O4 to CuO due to the consumption of carbon under reduced ...
Source: Physica E: Low dimensional Systems and Nanostructures - September 28, 2019 Category: Nanotechnology Source Type: research

Design of a metamaterial inspired omega shaped resonator based sensor for industrial implementations
In this study, the omega shaped resonator based sensor structure by inspiring of metamaterial (MTM) concept is presented at X-band frequency regime for industrial purpose both numerically and experimentally. Four distinguishing applications which are (i) authentic and inauthentic gasoline samples, (ii) authentic and inauthentic diesel samples, (iii) clean and waste lubricant samples and (iv) clean and waste transformer oil samples have been realized by determining dielectric properties of them. Although there are close dielectric constant values between the samples (about 0.65 for (i), 0.25 for (ii), 0.10 for (iii) and 0.1...
Source: Physica E: Low dimensional Systems and Nanostructures - September 28, 2019 Category: Nanotechnology Source Type: research

The ferromagnetic and half-metal properties of hydrogen adatoms, fluorine adatoms and boron adatoms adsorbed at edges of zigzag silicene nanoribbon
Publication date: Available online 26 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Gang Guo, Zhongxiang Xie, Yong Zhang, Yuanxiang Deng, Jie Tang, Yuliang MaoAbstractUsing the first-principles calculations based on density functional theory, we studied the stability, electronic and magnetic properties of zigzag silicene nanoribbon (ZSiNR) with edge adsorbed hydrogen adatoms, fluorine adatoms and boron adatoms. Our study showed that the formation energy in all adsorbed configurations is lower than that of pristine 6-ZSiNR. Significant charge transfer from Si atoms to H, F and B adato...
Source: Physica E: Low dimensional Systems and Nanostructures - September 26, 2019 Category: Nanotechnology Source Type: research

Numerical analysis of new output structures changed base on bus waveguide for 1.3 μm InAs/InGaAs quantum dot microdisk lasers on silicon
Publication date: January 2020Source: Physica E: Low-dimensional Systems and Nanostructures, Volume 115Author(s): Wei Wang, Jun Wang, Zhuo Cheng, Zeyuan Yang, Haiying Yin, Yidong Zhang, Ming Yang, Qiuhuan Ren, Yongqing Huang, Xiaomin RenAbstractWe design two types of output waveguide structures based on bus waveguide: waveguide overlapping with microdisk cavity and single-ended output bus waveguide. This is the first time that these two output structures have been designed for microdisk lasers on silicon. Three-dimensional finite-difference time-domain method is used to numerically analyze the optical mode characteristics ...
Source: Physica E: Low dimensional Systems and Nanostructures - September 26, 2019 Category: Nanotechnology Source Type: research

Electronic properties and carrier transport properties of low-dimensional aluminium doped silicene nanostructure
Publication date: February 2020Source: Physica E: Low-dimensional Systems and Nanostructures, Volume 116Author(s): Mu Wen Chuan, Kien Liong Wong, Afiq Hamzah, Shahrizal Rusli, Nurul Ezaila Alias, Cheng Siong Lim, Michael Loong Peng TanAbstractUnlike graphene which requires redesigned fabrication technique, silicene is predicted to be compatible with the silicon wafer technology. However, similar to graphene, the gapless properties of silicene hinder its application as field-effect transistors (FETs). By employing nearest neighbour tight-binding (NNTB) approach and Landuaer-Büttiker formalism, the analytical equations ...
Source: Physica E: Low dimensional Systems and Nanostructures - September 26, 2019 Category: Nanotechnology Source Type: research

Photocatalytic performance of novel chromium oxide-silicon dioxide decorated on multi-walled carbon nanotubes and graphene oxide nanocomposites: Preparation, structural, and optimization
Publication date: February 2020Source: Physica E: Low-dimensional Systems and Nanostructures, Volume 116Author(s): Muhammad Aqeel Ashraf, Zhenling Liu, Dongfang Zheng, Cheng Li, Wan-Xi Peng, Ali FakhriAbstractIn this project, we successfully prepared Cr2O3-SiO2/graphene oxide (GO) or multi-walled carbon nanotubes (MWCNTs) by microwave/ultrasonic/hydrothermally method, aiming for the photo-degradation capture of Parathion compound from aqueous solutions. For the removal of Parathion, the photocatalysis properties is different and the apparent degradation amount sequence is SiO2 
Source: Physica E: Low dimensional Systems and Nanostructures - September 26, 2019 Category: Nanotechnology Source Type: research

Low operating temperature NO gas sensors based hydrogen peroxide treated GaN nanorods
Publication date: Available online 23 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Maddaka Reddeppa, Thi Kim Phung Nguyen, Byung-Guon Park, Song-Gang Kim, Moon-Deock KimAbstractIn recent days, surface treatment strategies have employed to enhance the active sites for chemisorption of gas molecules. In this work, the simple and effective hydrogen peroxide (H2O2) treatment is used to enhance the active sites on the surface of gallium nitride (GaN) nanorods (NRs) for nitric oxide (NO) gas detection. The surface treatment was carried out by immersing the GaN NRs into a hydrogen peroxide...
Source: Physica E: Low dimensional Systems and Nanostructures - September 25, 2019 Category: Nanotechnology Source Type: research

Controlling the electronic transport property of a molecular organic device by the heavy metal atomic manipulation
Publication date: Available online 23 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Xing-Qian Cui, Zhi-Qiang Fan, Liu-Ying Nie, Zhen-Hua ZhangAbstractUsing nonequilibrium Green's function combined with density functional theory, we investigate the transport properties of a single perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) molecular device before and after adsorbing single heavy metal atoms Ni, Pd, Cd, Cu, Zn, and Ag. We find that the adsorption of a single Ni or Pd atom has a slight modulation on the I–V characteristic of the junction. However, the adsorptions of a s...
Source: Physica E: Low dimensional Systems and Nanostructures - September 25, 2019 Category: Nanotechnology Source Type: research

Non-local effect on the vibration analysis of double walled carbon nanotubes based on Donnell shell theory
Publication date: Available online 21 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Sehar Asghar, Muhammad Nawaz Naeem, Muzamal HussainAbstractThis piece of work describes a free vibration analysis of double walled carbon nanotubes (DWCNTs) based on non-local elastic shell model. The classical Donnell's shell theory is engrossed to account the effects of small scale by merging Eringen's non-local elasticity equations into it. The wave propagation approach is implemented to analyse the influence of various edge conditions and also van der Waals interaction forces between inner and out...
Source: Physica E: Low dimensional Systems and Nanostructures - September 22, 2019 Category: Nanotechnology Source Type: research

Structural, photoluminescence and magnetic properties of chromium (Cr) doped manganese oxide (Mn3O4) hexagonal particles
Publication date: Available online 19 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): A. Nallathambi, A. Prakasam, R. Azhagu RajAbstractAt ambient temperature, manganese oxide (undoped) as well as a variety of Cr doped Mn3O4, CrxMn3O41−x (x = 0.01, 0.02 and 0.03) hexagonal-like particles have been synthesized by employing a microwave synthesis approach. The synthesized samples properties were known by various instrumental techniques, for instance, XRD (X-ray diffraction), TEM and SEM (transmission and scanning electron microscopy), optical absorption and photoluminescence (PL...
Source: Physica E: Low dimensional Systems and Nanostructures - September 20, 2019 Category: Nanotechnology Source Type: research

Collapses-revivals phenomenon of a system of a two-linked cavities in the presence of an external classical field
Publication date: Available online 5 June 2018Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): S.A. Hanoura, M.M.A. Ahmed, E.M. Khalil, A.-S.F. ObadaAbstractUnder canonical transformations, the Hamiltonian of a Jaynes-Cummings-Hubbard system composed of two coupled cavities, each containing a two-level atom in the presence of an external classical field, is simplified. Effective Hamiltonians in three limiting regimes are displayed. Initially the cavity fields are prepared in the vacuum states while, the first atom in its excited state and the second in its ground state. The Schrödinger equation ...
Source: Physica E: Low dimensional Systems and Nanostructures - September 20, 2019 Category: Nanotechnology Source Type: research

Performance analysis of GeSn/SiGeSn quantum well infrared photodetector in terahertz wavelength region
Publication date: Available online 30 August 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Soumava Ghosh, Bratati Mukhopadhyay, Gopa Sen, P.K. BasuAbstractThis work presents a theoretical analysis of a GeSn/SiGeSn Quantum Well Infrared Photodetector (QWIP). The absorption coefficient is obtained by inter subband transition of the carriers inside the well. Main analysis is concentrated on finding the quantum efficiency, responsivity of QWIP. The responsivity of the detector is studied as a function of capture probability, carrier lifetime and well number. The result shows that an acceptable res...
Source: Physica E: Low dimensional Systems and Nanostructures - September 20, 2019 Category: Nanotechnology Source Type: research

Quantum coherence and quantum Fisher information in the XXZ system
Publication date: Available online 31 August 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Biao-Liang Ye, Li-Yuan Xue, Yu-Liang Fang, Sheng Liu, Qi-Cheng Wu, Yan-Hui Zhou, Chui-Ping YangAbstractWe investigate the quantum phase transition of the XXZ model via quantum coherence and quantum Fisher information. The quantum phase transition of the nearest, the next-nearest, and the third-nearest particles is demonstrated by quantum Fisher information and quantum coherence measures, i.e., relative entropy, l1 norm, quantum Jensen-Shannon divergence, respectively. Both analytical and numerical result...
Source: Physica E: Low dimensional Systems and Nanostructures - September 20, 2019 Category: Nanotechnology Source Type: research

Hydrogenated ψ-graphene: Band gap engineering and optical properties
Publication date: Available online 3 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Xiaoming Huang, Mengyao Ma, Li Cheng, Lizhao LiuAbstractHydrogen passivation was predicted to be an effective method to open the band gap of ψ-graphene by the density functional theory calculations. A critical H coverage of ∼60% was found, above which the hydrogenated ψ-graphene opens a band gap. The band gap can be tailored within a wide range of 0–3.57 eV by changing the H coverage. Meanwhile, the opened band gap brings the hydrogenated ψ-graphene different optical properties ...
Source: Physica E: Low dimensional Systems and Nanostructures - September 20, 2019 Category: Nanotechnology Source Type: research

Numerical Analysis of New Output Structures Changed Base on Bus Waveguide for 1.3 μm InAs/InGaAs Quantum Dot Microdisk Lasers on Silicon
Publication date: Available online 5 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Wei Wang, Jun Wang, Zhuo Cheng, Zeyuan Yang, Haiying Yin, Yidong Zhang, Ming Yang, Qiuhuan Ren, Yongqing Huang, Xiaomin RenAbstractWe design two types of output waveguide structures based on bus waveguide: waveguide overlapping with microdisk cavity and single-ended output bus waveguide. This is the first time that these two output structures have been designed for microdisk lasers on silicon. Three-dimensional finite-difference time-domain method is used to numerically analyze the optical mode charact...
Source: Physica E: Low dimensional Systems and Nanostructures - September 20, 2019 Category: Nanotechnology Source Type: research

Role of solvent used to cast P3HT thin films on the performance of ZnO/P3HT hybrid photo detector
Publication date: Available online 5 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): C. Shalu, Mayoorika Shukla, Ananya Tiwari, Jitesh Agrawal, Anubha Bilgayian, Vipul SinghAbstractThe effect of ZnO nanostructured morphology and the role of casting solvent for the active layer of P3HT have been investigated in terms of improved photo response of ZnO/ Poly(3-hexylthiophene-2, 5-diyl) (P3HT) hybrid photo detector. Herein, a systematic study has been performed by varying the solvent used for casting of P3HT i.e. Chlorobenzene (CB) and Chloroform (CF). The dark rectification ratio and resp...
Source: Physica E: Low dimensional Systems and Nanostructures - September 20, 2019 Category: Nanotechnology Source Type: research

The preparation and photocatalytic properties of Na doped ZnO porous film composited with Ag nano-sheets
Publication date: Available online 7 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Bolong Wang, Fucheng Yu, Haishan Li, Tianyun Song, Dongmei Nan, Ling He, Hongyan Duan, Shu WangAbstractThe precursors with porous skeleton structures were prepared by a sol-gel process with the different mass ratios of Zn source to glucose as the raw materials. Then Na doped ZnO films were deposited on the precursors by a chemical vapor deposition (CVD) method. Finally, the sample prepared with optimized conditions was composited with Ag nano-sheets via a chemical method, and a sample of Na doped ZnO p...
Source: Physica E: Low dimensional Systems and Nanostructures - September 20, 2019 Category: Nanotechnology Source Type: research

Interminiband absorption in a quantum ring superlattice in magnetic field with periodic vector potential
Publication date: Available online 18 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Vigen Aziz-Aghchegala, Vram Mughnetsyan, Ara Atayan, Albert KirakosyanAbstractThe miniband Aharonov-Bohm oscillations and the interminiband absorption coefficient have been considered theoretically for one-layer superlattices of square and rectangular symmetries, composed of cylindrical quantum rings in the external transverse magnetic field with a periodic vector potential by the lattice constants. The crossings and anticrossings of the energies corresponding to different values of quasimomentum are ...
Source: Physica E: Low dimensional Systems and Nanostructures - September 20, 2019 Category: Nanotechnology Source Type: research

Electronic properties and carrier transport properties of low dimensional aluminium doped silicene nanostructure
Publication date: Available online 18 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Mu Wen Chuan, Kien Liong Wong, Afiq Hamzah, Shahrizal Rusli, Nurul Ezaila Alias, Cheng Siong Lim, Michael Loong Peng TanAbstractUnlike graphene which requires redesigned fabrication technique, silicene is predicted to be compatible with the silicon wafer technology. However, similar to graphene, the gapless properties of silicene hinder its application as field-effect transistors (FETs). By employing nearest neighbour tight-binding (NNTB) approach and Landuaer-Büttiker formalism, the analytical e...
Source: Physica E: Low dimensional Systems and Nanostructures - September 18, 2019 Category: Nanotechnology Source Type: research

Monte Carlo study of magnetization plateaus and thermodynamic properties of a nano-graphene with a sandwich-like structure in a longitudinal magnetic field
Publication date: Available online 17 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Dan Lv, Ye Ma, Xiao-hong Luo, Wei Jiang, Feng Wang, Qian LiABSTRACTMonte Carlo simulation has been used to study magnetization plateaus and thermodynamic properties of the sandwich-like nano-graphene with mixed spin-3/2 and spin-5/2 in a longitudinal magnetic field. The effects of the single-ion anisotropy, the intralayer and interlayer exchange couplings as well as the longitudinal magnetic field on the magnetization, internal energy and specific heat of the system are discussed in detail. Multiple m...
Source: Physica E: Low dimensional Systems and Nanostructures - September 17, 2019 Category: Nanotechnology Source Type: research

A label-free graphene-based nanosensor using surface plasmon resonance for biomaterials detection
Publication date: Available online 17 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Homa Farmani, Ali Farmani, Zeinab BiglariAbstractGraphene biosensors have received more and more attention over the past two decades in the modern fields including labeled, and label-free sensing owing to their ability to harness of electromagnetic fields in a fantastic way. Among these, label-free graphene plasmonic biosensors have been received significant attention for nano-scale applications. The main aim of this work is to study the detection capacity of the biomaterial-based graphene plasmonic b...
Source: Physica E: Low dimensional Systems and Nanostructures - September 17, 2019 Category: Nanotechnology Source Type: research

Mechanical flexibility and strain engineered-band structures of monolayer Bi2O2Se
Publication date: Available online 14 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Yi Zhang, Qiang Gao, Xueyuan Han, Yufeng PengAbstractAn emerging two-dimensional (2D) layered material, Bi2O2Se, has attracted much attention and shown great applications in integrated optoelectronic devices, such as infrared photon-detector, due to its high carrier mobility, air-stability, layer-tunable gap (0.8–2.2eV) and near-infrared optoelectronic property. Herein, the properties of the monolayer (ML) Bi2O2Se, such as the mechanical flexibility, electronic structure, optical property, are c...
Source: Physica E: Low dimensional Systems and Nanostructures - September 15, 2019 Category: Nanotechnology Source Type: research

Origin of colossal dielectric behavior in hydrothermally prepared non-stoichiometric α-MnO2 nanorods
Publication date: Available online 14 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Reenu Elizabeth John, Anoop Chandran, Mammen Samuel, Marykutty Thomas, K.C. GeorgeAbstractPrecise incorporation of defects into transition metal oxides is gaining scientific interest among researchers as a pertinent variable for tuning their functional properties. Herein we report an unusual behavior in the dielectric properties of α-MnO2 nanorods prepared by hydrothermal method. Recently, we have reported the origin of ferroelectricity in α-MnO2 nanorods prepared by co-precipitation metho...
Source: Physica E: Low dimensional Systems and Nanostructures - September 15, 2019 Category: Nanotechnology Source Type: research

The size dependent thermal diffusivity of water soluble CdTe quantum dots using dual beam thermal lens spectroscopy
Publication date: Available online 14 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): T.K. Nideep, M. Ramya, V.P.N. Nampoori, M. KailasnathAbstractSize dependent thermal diffusivity of CdTe colloidal quantum dots samples has been studied using dual beam thermal lens spectroscopy. The thermal diffusivity values of the colloidal solution of CdTe quantum dots synthesized in water were found to be less than that of pure water (1.4x10-7m2/s) varying from 0.63 x 10-7m2/s to 0.15 x 10-7 m2/s. The samples with this kind of very low value of thermal diffusivity can be good thermal insulators. T...
Source: Physica E: Low dimensional Systems and Nanostructures - September 14, 2019 Category: Nanotechnology Source Type: research

Facile synthesis and characterization of graphene oxide/tungsten oxide thin film supercapacitor for electrochemical energy storage
This study involves the synthesize of GO through Hummers Method and coating it on the substrates. Accordingly, thin film supercapacitor structures of GO/WO3 on ITO, FTO, PMMA and Glass substrates were successfully produced through CBD (Chemical Bath Deposition) method. Structural properties were characterized by XRD, SEM, AFM, ATR, and UV. I–V and C–V curves were investigated in the determined voltage range (from −0.2–1.2 V) at 25, 50, 75 and 100 mV/s various scanning potential. Regarding the maximum capacitance and energy intensity of the thin films, the maximum capacitance was 268.5 F/g and ...
Source: Physica E: Low dimensional Systems and Nanostructures - September 14, 2019 Category: Nanotechnology Source Type: research

Photocatalytic performance of novel Chromium sulfide-silicon dioxide decorated on multi-walled carbon nanotubes and graphene oxide nanocomposites: Preparation, structural, and optimization
Publication date: Available online 14 September 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Muhammad Aqeel Ashraf, Zhenling Liu, Dongfang Zheng, Cheng Li, Wan-Xi Peng, Ali FakhriAbstractIn this project, we successfully prepared Cr2O3-SiO2/graphene oxide (GO) or multi-walled carbon nanotubes (MWCNTs) by microwave/ultrasonic/hydrothermally method, aiming for the photo-degradation capture of Parathion compound from aqueous solutions. For the removal of Parathion, the photocatalysis properties is different and the apparent degradation amount sequence is SiO2 
Source: Physica E: Low dimensional Systems and Nanostructures - September 14, 2019 Category: Nanotechnology Source Type: research