Subjects -> MATHEMATICS (Total: 1013 journals)
    - APPLIED MATHEMATICS (92 journals)
    - GEOMETRY AND TOPOLOGY (23 journals)
    - MATHEMATICS (714 journals)
    - MATHEMATICS (GENERAL) (45 journals)
    - NUMERICAL ANALYSIS (26 journals)
    - PROBABILITIES AND MATH STATISTICS (113 journals)

MATHEMATICS (714 journals)            First | 1 2 3 4     

Showing 401 - 538 of 538 Journals sorted alphabetically
Journal of Mathematical and Fundamental Sciences     Open Access  
Journal of Mathematical Behavior     Hybrid Journal   (Followers: 6)
Journal of Mathematical Chemistry     Hybrid Journal   (Followers: 5)
Journal of Mathematical Finance     Open Access   (Followers: 6)
Journal of Mathematical Imaging and Vision     Hybrid Journal   (Followers: 6)
Journal of Mathematical Logic     Hybrid Journal   (Followers: 2)
Journal of Mathematical Sciences     Hybrid Journal  
Journal of Mathematical Sciences and Applications     Open Access   (Followers: 2)
Journal of Mathematical Sociology     Hybrid Journal   (Followers: 3)
Journal of Mathematics     Open Access  
Journal of Mathematics and Statistics     Open Access   (Followers: 6)
Journal of Mathematics and Statistics Studies     Open Access  
Journal of Mathematics and the Arts     Hybrid Journal   (Followers: 1)
Journal of Mathematics Education at Teachers College     Open Access   (Followers: 4)
Journal of Mathematics in Industry     Open Access  
Journal of Mathematics Research     Open Access  
Journal of Metallurgy     Open Access   (Followers: 8)
Journal of Modern Mathematics Frontier     Open Access  
Journal of Multidisciplinary Modeling and Optimization     Open Access   (Followers: 1)
Journal of Multivariate Analysis     Hybrid Journal   (Followers: 15)
Journal of Nonlinear Analysis and Optimization : Theory & Applications     Open Access   (Followers: 4)
Journal of Nonlinear Mathematical Physics     Hybrid Journal   (Followers: 2)
Journal of Nonlinear Science     Hybrid Journal   (Followers: 1)
Journal of Numerical Cognition     Open Access   (Followers: 1)
Journal of Optimization     Open Access   (Followers: 5)
Journal of Peridynamics and Nonlocal Modeling     Hybrid Journal  
Journal of Progressive Research in Mathematics     Open Access   (Followers: 1)
Journal of Pseudo-Differential Operators and Applications     Hybrid Journal  
Journal of Pure and Applied Algebra     Full-text available via subscription   (Followers: 3)
Journal of Quantitative Linguistics     Hybrid Journal   (Followers: 6)
Journal of Scientific Computing     Hybrid Journal   (Followers: 19)
Journal of Scientific Research     Open Access  
Journal of Symbolic Computation     Hybrid Journal   (Followers: 2)
Journal of the Australian Mathematical Society     Full-text available via subscription  
Journal of the Egyptian Mathematical Society     Open Access  
Journal of the Indian Mathematical Society     Hybrid Journal  
Journal of the Institute of Mathematics of Jussieu     Hybrid Journal  
Journal of the London Mathematical Society     Hybrid Journal   (Followers: 3)
Journal of the Nigerian Mathematical Society     Open Access  
Journal of Theoretical and Applied Physics     Open Access   (Followers: 9)
Journal of Topology and Analysis     Hybrid Journal  
Journal of Transport and Supply Chain Management     Open Access   (Followers: 10)
Journal of Turbulence     Hybrid Journal   (Followers: 7)
Journal of Universal Mathematics     Open Access  
Journal of Urban Regeneration & Renewal     Full-text available via subscription   (Followers: 8)
JRAMathEdu : Journal of Research and Advances in Mathematics Education     Open Access   (Followers: 4)
JUMLAHKU : Jurnal Matematika Ilmiah STKIP Muhammadiyah Kuningan     Open Access  
JURING (Journal for Research in Mathematics Learning)     Open Access  
Jurnal Didactical Mathematics     Open Access   (Followers: 4)
Jurnal Matematika     Open Access  
Jurnal Matematika, Sains, Dan Teknologi     Open Access  
Jurnal Natural     Open Access  
Jurnal Pendidikan Matematika Raflesia     Open Access  
Jurnal Penelitian Pembelajaran Matematika Sekolah     Open Access  
Jurnal Penelitian Sains (JPS)     Open Access  
Jurnal Riset Pendidikan Matematika     Open Access  
Jurnal Sains Matematika dan Statistika     Open Access  
Jurnal Tadris Matematika     Open Access  
Jurnal Teknologi dan Sistem Komputer     Open Access  
Kontinu : Jurnal Penelitian Didaktik Matematika     Open Access  
Kreano, Jurnal Matematika Kreatif-Inovatif     Open Access  
Le Matematiche     Open Access  
Lettera Matematica     Hybrid Journal  
Lietuvos Matematikos Rinkinys     Open Access  
Limits : Journal of Mathematics and Its Applications     Open Access  
Linear Algebra and its Applications     Full-text available via subscription   (Followers: 22)
Linear and Multilinear Algebra     Hybrid Journal   (Followers: 7)
Lithuanian Mathematical Journal     Hybrid Journal  
Lobachevskii Journal of Mathematics     Open Access  
Logic Journal of the IGPL     Hybrid Journal   (Followers: 1)
Logica Universalis     Hybrid Journal  
manuscripta mathematica     Hybrid Journal   (Followers: 1)
MaPan : Jurnal Matematika dan Pembelajaran     Open Access  
Marine Genomics     Hybrid Journal   (Followers: 1)
Matemáticas, Educación y Sociedad     Open Access  
Matematicheskie Zametki     Full-text available via subscription  
Mathematica Scandinavica     Full-text available via subscription   (Followers: 1)
Mathematical Analysis and its Contemporary Applications     Open Access   (Followers: 1)
Mathematical Communications     Open Access  
Mathematical Computation     Open Access   (Followers: 1)
Mathematical Geosciences     Hybrid Journal   (Followers: 4)
Mathematical Journal of Interdisciplinary Sciences     Open Access   (Followers: 1)
Mathematical Medicine and Biology: A Journal of the IMA     Hybrid Journal   (Followers: 1)
Mathematical Methods in the Applied Sciences     Hybrid Journal   (Followers: 4)
Mathematical Methods of Statistics     Hybrid Journal   (Followers: 4)
Mathematical Modelling and Analysis     Open Access   (Followers: 1)
Mathematical Modelling of Natural Phenomena     Open Access   (Followers: 1)
Mathematical Models and Methods in Applied Sciences     Hybrid Journal   (Followers: 1)
Mathematical Notes     Hybrid Journal  
Mathematical Proceedings of the Cambridge Philosophical Society     Full-text available via subscription   (Followers: 2)
Mathematical Programming Computation     Hybrid Journal   (Followers: 2)
Mathematical Sciences     Open Access  
Mathematical Social Sciences     Hybrid Journal   (Followers: 1)
Mathematical Theory and Modeling     Open Access   (Followers: 6)
Mathematical Thinking and Learning     Hybrid Journal   (Followers: 4)
Mathematics and Statistics     Open Access   (Followers: 2)
Mathematics Education Forum Chitwan     Open Access   (Followers: 1)
Mathematics Education Journal     Open Access   (Followers: 4)
Mathematics Education Research Journal     Partially Free   (Followers: 16)
Mathematics of Control, Signals, and Systems (MCSS)     Hybrid Journal   (Followers: 5)
Mathematics Teacher: Learning and Teaching PK-12     Full-text available via subscription   (Followers: 9)
Mathematics Teaching in the Middle School     Full-text available via subscription   (Followers: 8)
Mathematische Annalen     Hybrid Journal   (Followers: 2)
Mathematische Nachrichten     Hybrid Journal   (Followers: 1)
Mathematische Semesterberichte     Hybrid Journal  
Mathematische Zeitschrift     Hybrid Journal   (Followers: 2)
MATICS     Open Access  
Matrix Science Mathematic     Open Access   (Followers: 1)
Measurement Science Review     Open Access   (Followers: 3)
Mediterranean Journal of Mathematics     Hybrid Journal  
Memetic Computing     Hybrid Journal  
Mendel : Soft Computing Journal     Open Access  
Metaheuristics     Hybrid Journal  
Metals and Materials International     Hybrid Journal   (Followers: 1)
Metascience     Hybrid Journal   (Followers: 1)
Metrology and Instruments / Метрологія та прилади     Open Access  
Milan Journal of Mathematics     Hybrid Journal  
MLQ- Mathematical Logic Quarterly     Hybrid Journal   (Followers: 1)
Modelling in Civil and Environmental Engineering     Open Access   (Followers: 4)
MONA : Matematik- og Naturfagsdidaktik     Hybrid Journal  
Monatshefte fur Mathematik     Hybrid Journal  
Moroccan Journal of Pure and Applied Analysis     Open Access  
Moscow University Mathematics Bulletin     Hybrid Journal  
MSOR Connections     Open Access   (Followers: 1)
Multiscale Modeling and Simulation     Hybrid Journal   (Followers: 2)
MUST : Journal of Mathematics Education, Science and Technology     Open Access   (Followers: 4)
Nagoya Mathematical Journal     Hybrid Journal   (Followers: 1)
Nano Research     Hybrid Journal   (Followers: 4)
Nanotechnologies in Russia     Hybrid Journal  
Natural Resource Modeling     Hybrid Journal  
New Mathematics and Natural Computation     Hybrid Journal   (Followers: 1)
Nonlinear Analysis     Hybrid Journal   (Followers: 1)
Nonlinear Analysis : Modelling and Control     Open Access   (Followers: 1)
Nonlinear Analysis: Hybrid Systems     Hybrid Journal  
Nonlinear Analysis: Real World Applications     Hybrid Journal   (Followers: 2)
Nonlinear Differential Equations and Applications NoDEA     Hybrid Journal  
North Carolina Journal of Mathematics and Statistics     Open Access  
Note di Matematica     Open Access  
NTM Zeitschrift für Geschichte der Wissenschaften, Technik und Medizin     Hybrid Journal   (Followers: 3)
Numeracy : Advancing Education in Quantitative Literacy     Open Access   (Followers: 1)
Numerical Analysis and Applications     Hybrid Journal   (Followers: 1)
Numerical Functional Analysis and Optimization     Hybrid Journal   (Followers: 3)
Numerical Linear Algebra with Applications     Hybrid Journal   (Followers: 7)
Numerische Mathematik     Hybrid Journal  
Open Journal of Discrete Mathematics     Open Access   (Followers: 3)
Open Journal of Modelling and Simulation     Open Access   (Followers: 2)
Operations Research Letters     Hybrid Journal   (Followers: 11)
Optimization Letters     Hybrid Journal   (Followers: 2)
Optimization Methods and Software     Hybrid Journal   (Followers: 6)
Opuscula Mathematica     Open Access  
Order     Hybrid Journal  
ORiON     Open Access  
P-Adic Numbers, Ultrametric Analysis, and Applications     Hybrid Journal  
PAMM : Proceedings in Applied Mathematics and Mechanics     Free  
Parallel Processing Letters     Hybrid Journal   (Followers: 3)
Peking Mathematical Journal     Hybrid Journal  
Periodica Mathematica Hungarica     Full-text available via subscription   (Followers: 1)
Petroleum Science     Open Access  
Philosophia Mathematica     Hybrid Journal   (Followers: 1)
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences     Full-text available via subscription   (Followers: 9)
PNA. Revista de Investigación en Didáctica de la Matemática     Open Access  
Polar Science     Hybrid Journal   (Followers: 3)
Positivity     Hybrid Journal  
Press Start     Open Access   (Followers: 1)
Prime Number     Full-text available via subscription  
Probability in the Engineering and Informational Sciences     Hybrid Journal   (Followers: 1)
Problemy Peredachi Informatsii     Full-text available via subscription  
Proceedings - Mathematical Sciences     Open Access   (Followers: 5)
Proceedings of the American Mathematical Society, Series B     Open Access   (Followers: 3)
Proceedings of the Edinburgh Mathematical Society     Hybrid Journal  
Proceedings of the Institution of Civil Engineers - Engineering and Computational Mechanics     Hybrid Journal   (Followers: 2)
Proceedings of the Latvian Academy of Sciences. Section B: Natural, Exact and Applied Sciences     Open Access   (Followers: 1)
Proceedings of the London Mathematical Society     Hybrid Journal   (Followers: 4)
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences     Full-text available via subscription   (Followers: 6)
Proceedings of the Royal Society of Edinburgh Section A Mathematics     Full-text available via subscription  
Proceedings of the Steklov Institute of Mathematics     Hybrid Journal  
Progress in Photovoltaics: Research & Applications     Hybrid Journal   (Followers: 6)
Proyecciones : Revista de Matematica     Open Access   (Followers: 1)
Publications Mathématiques de Besançon : Algèbre et Théorie des Nombres     Open Access  
Publications Mathématiques de L'IHÉS     Hybrid Journal   (Followers: 3)
Punjab University Journal of Mathematics     Open Access   (Followers: 2)
Pure Mathematics and Applications     Open Access  
Pythagoras     Open Access  
Quaestiones Mathematicae     Hybrid Journal  
Qualitative Theory of Dynamical Systems     Hybrid Journal  
Quantum Studies : Mathematics and Foundations     Hybrid Journal   (Followers: 2)
Quarterly Journal of Mathematics     Hybrid Journal  
Rare Metals     Hybrid Journal   (Followers: 2)
Recreational Mathematics Magazine     Open Access  
REDIMAT : Journal of Research in Mathematics Education     Open Access   (Followers: 6)
REMAT : Revista Eletrônica da Matemática     Open Access  
Rendiconti del Circolo Matematico di Palermo     Hybrid Journal  
Reportes Científicos de la FaCEN     Open Access  
Research in Mathematics Education     Hybrid Journal   (Followers: 13)
Research in Nondestructive Evaluation     Hybrid Journal   (Followers: 7)
Research in Number Theory     Hybrid Journal  
Research in the Mathematical Sciences     Open Access  
Research Journal of Pure Algebra     Open Access   (Followers: 1)
Researches in Mathematics     Open Access  
Results in Control and Optimization     Open Access  

  First | 1 2 3 4     

Similar Journals
Journal Cover
Nanotechnologies in Russia
Journal Prestige (SJR): 0.259
Citation Impact (citeScore): 1
Number of Followers: 0  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1995-0799 - ISSN (Online) 1995-0780
Published by Springer-Verlag Homepage  [2469 journals]
  • Fabrication of 3D Porous Graphene@SnO2 Aerogel via In Situ Gamma Ray
           Irradiation Induced Self-Assembly

    • Free pre-print version: Loading...

      Abstract: A environmentally-friendly and facile approach for the fabrication of graphene nano-sheets decorated with SnO2 composite aerogel (GA@SnO2) has been developed by γ-ray irradiation induced self-assembly under the protection of N2 gas at room temperature. The graphene oxide (GO) and Sn2+ ions are simultaneously reduced and oxidized respectively by the electrons and hydroxyl radical generated from the radiolysis of water. Reduction and oxidation effects were confirmed. SnO2 nanoparticles with an average diameter of 3–5 nm were uniformly dispersed on the surface of graphene sheets in GA@SnO2. A possible formation process was also proposed. Stannous ions were oxidized to SnO2 and promoted the reduction of GO to graphene as well in one-step.
      PubDate: 2022-02-01
       
  • On the Development of Reagent-free Conductive Nanocomposite Systems for
           the Modification of Printed Electrodes When Producing Glucose Biosensors

    • Free pre-print version: Loading...

      Abstract: The possibility of using redox-active polymers based on bovine serum albumin (BSA) and chitosan covalently linked to neutral red, thionine, and ferrocene mediators, and containing carbon nanotubes (CNTs) for glucose-oxidase immobilization is investigated. The structure of the obtained polymers is studied by infrared (IR) spectroscopy, spectrophotometry, atomic-absorption spectroscopy, and scanning electron microscopy. Using the method of cyclic voltammetry, the electrochemical characteristics of the studied conductive nanocomposite systems are found, namely, a heterogeneous rate constant of electron transfer and a rate constant of interaction with glucose oxidase. The systems containing a redox-active polymer based on BSA modified with a ferrocene mediator turn out to be the most promising. Biosensors formed using nanocomposite matrices have a high sensitivity with a lower limit of determined glucose concentrations of 0.1 mM and are characterized by a high correlation (R 2 = 0.9827) with the results of determining the glucose content in human blood by the standard method.
      PubDate: 2022-02-01
       
  • Vibration Analysis of Piezoelectric Carbon Nanotube Considering Surface
           Effects, Located in the Magnetic Field and Resting on Nonlinear
           Viscoelastic Foundation

    • Free pre-print version: Loading...

      Abstract: In this study, the free and forced vibrations of piezoelectric carbon nanotubes with the effect of surface effects placed in a magnetic field situated on a viscoelastic foundation with nonlinear damping and stiffness elements under the influence of external harmonic force are investigated. The nonlocal theory is used to illustrate the effects of the nanoscale in the theoretical model and the equations of motion of the system are extracted using the dynamic equilibrium conditions of the element. To reduce the order of the obtained dynamical equations, Galerkin method is used. Considering the boundary conditions of the problem, which are both simple support (SS) or clamped (CC), the nonlinear time differential equations of the system and its coefficients are obtained. After that, using the multiple time scales method, an analytical closed-form solution aimed at amplitude-frequency response curves for forced vibration of a nonlinear system is extracted. Moreover, the effect of CNT surface effect, voltage applied to the system, and nonlinear viscoelastic foundation stiffness on the results of frequencies and dynamic response curves will be discovered. It can be resulted that the highest frequency is related to the form that considers all surface effects and the lowest frequency is related to the form that does not consider any of the surface effects. Also, existence of the non-local parameter reduces the maximum range of fluctuations. Finally, the obtained results are validated with the expected ones.
      PubDate: 2022-02-01
       
  • Recent Advancements in Doped Titanium Dioxide (TiO2) Nanostructures for
           Photocatalytic Dye Degradation

    • Free pre-print version: Loading...

      Abstract: Titanium dioxide (TiO2) and doped TiO2 have emerged as efficient photocatalytic materials for the degradation of harmful dyes released in water. The doping significantly increases the photocatalytic activity of TiO2 by enhancing light absorption in visible region and by alteration of structure, surface area and morphology etc. The doping of TiO2 has been achieved with various elements from the transition metal series, ions, nitrogen, with rare earths and other metallic nanostructures. Recently, significant new developments were noticed in the literature about doping of TiO2 with new materials using different strategies. In this review, the basic information of TiO2 as a photocatalyst is presented and the importance of doping to improve the photocatalytic performance of TiO2 is highlighted. Recent reports about the doped TiO2 from the literature are listed in tabular format and critically analyzed. The collective information presented will help to design new doping strategies and to come up with novel and more efficient TiO2 based photocatalysts to develop a water purification technology.
      PubDate: 2022-02-01
       
  • Nanofiber Material with Hydrophobic-Hydrophilic Properties Based on
           Poly(3-Hydroxybutyrate) and Poly(2-Hydroxyethyl Methacrylate)

    • Free pre-print version: Loading...

      Abstract: A new material with hydrophobic-hydrophilic properties is obtained based on ultrathin poly(3-hydroxybutyrate) (PHB) fibers modified with poly(2-hydroxyethyl methacrylate). The supramolecular structure of the samples is investigated by structurally dynamic methods: scanning electron microscopy, differential scanning calorimetry, and electron paramagnetic resonance. The equilibrium-kinetic characteristics of water sorption by the material are determined. Evidence is obtained by the method of 1H NMR (proton nuclear magnetic resonance spectroscopy) for the chemical modification of the PHB surface due to the participation of its terminal groups in the transesterification reaction of 2-hydroxyethyl methacrylate.
      PubDate: 2022-02-01
       
  • Possibilities and Limitations of CMOS Technology for the Production of
           Various Microelectronic Systems and Devices

    • Free pre-print version: Loading...

      Abstract: In this analytical review, we consider the fundamental laws of the development of planar CMOS technology (a technology based on the use of complementary field-effect MOSFETs formed by metal, oxide, and semiconductor layers) over the past 50 years. We show the possibilities and limitations of the geometric and equivalent scaling of planar and fin MOSFETs. The basic standards of CMOS technology for various devices and at various stages of its development are given. We make a distinction between the technological and design-topological norms in CMOS technology. The economic and technical limits of Moore’s Law for planar CMOS technology and the technological limit of its development over the past decade are shown. It is proved that in the next 30 years, the main direction in the development of microelectronic-device technology will be the direction called “More than Moore.” This direction is associated with the creation of numerous systems of ambient intelligence based on processes of the heterogeneous three-dimensional (volumetric) integration of various microchips. In this case, the best option is to arrange microcircuit crystals in stacks (packs) and connect them with vertical wires passing through silicon crystals and interconnecting boards. We note that in the case of the vertical assembly of crystals in the process of heterogeneous integration, most crystals with devices and through holes will have a thickness of less than 50 μm, which will require the study of the mechanical properties and strength of such membrane structures.
      PubDate: 2022-02-01
       
  • Influence of Heat Treatment on the Microstructure and Functional
           Characteristics of PtCu/C Catalysts

    • Free pre-print version: Loading...

      Abstract: PtCu/C electrocatalysts with different compositions, obtained by the method of the combined reduction of metal precursors, are heat treated at a temperature of 350°C in an argon atmosphere. The study by X-ray powder diffraction and transmission electron microscopy shows an increase in the average size of nanoparticles after heat treatment, which explains a decrease in the value of the electrochemically active surface area of the catalysts. An increase in the specific activity of the catalysts in the reaction of oxygen electroreduction after heat treatment is shown. The study by stress testing in the potential range of 0.6–1.4 V shows an increase in the stability of the heat-treated catalyst in comparison with the material in the “as prepared” state. A decrease in the amount of dissolved copper from the catalyst nanoparticles after heat treatment during electrochemical activation is shown, which also indicates an increase in catalyst stability.
      PubDate: 2022-02-01
       
  • Nanostructuring Polystyrene in a Melt

    • Free pre-print version: Loading...

      Abstract: The melts of four fractions of polystyrene are investigated by the method of electric birefringence. It is found that the electro-optical properties of the melt greatly depend on the length of the polymer chain. The fractions with the highest molecular weight showed an increase in the Kerr constant K at temperatures above 120°C. The anomalous nature of the temperature dependence of the form K ∝ T is explained by the fact that at high temperatures the flexibility of the polymer chain begins to grow rapidly. This process is called the liquid-liquid transition. As a result, the short-range orientational order increases, which is associated with a change in the mutual orientation of phenyl rings.
      PubDate: 2022-02-01
       
  • On the Possibility of the Nanoscale Focusing of Synchrotron Radiation
           Using an Adiabatic Refractive Lens

    • Free pre-print version: Loading...

      Abstract: A new version of the analytical theory for the nanoscale focusing of synchrotron radiation (SR) using compound refractive lenses (CRLs) is developed. A rather simple (from the point of view of both technical realization and theoretical calculations) model of an adiabatic refractive lens (ARL) in the form of a cascade of CRLs is proposed. It is shown that planar ARLs, which can be potentially implemented using silicon-surface microstructuring, can focus a SR beam to a size smaller than that, obtained in the use of CRLs (wc = λ(8δ)–1/2, where λ is the wavelength, δ = 1 – n, and n is the refractive index). It is found that, in the case of high-energy photons (more than 50 keV), the theoretically possible sizes of a focused beam of hard SR are less than 10 and 7 nm for silicon and nickel ARLs, respectively.
      PubDate: 2022-02-01
       
  • Artificial Intelligence for Nanostructured Materials

    • Free pre-print version: Loading...

      Abstract: The current level of development of artificial intelligence (AI) technologies makes it possible to solve many complex problems just as well as a human does. Importance advances in AI are especially noticeable in machine learning, the methods and algorithms of which are successfully adapted and actively used to solve a wide range of problems, including those in the field of nanotechnology. In modern fields of nanotechnology, it is important to speed up the process of searching for the optimal synthesis parameters when creating new unique nanomaterials. The variety of approaches and techniques in both machine learning and nanotechnology makes it necessary to systematically review current data on the use of AI for solving problems in nanomaterials science at both the stage of computer design and of the chemical synthesis and diagnostics of the resulting nanomaterials. Particular attention is paid to the use of machine-learning technologies for studying the thermal and dynamic properties of nanofluids, the processes of sorption of nanocomposites, the catalytic activity of nanoparticles, and the toxicity of nanoparticles and for solving the problems of nanosensorics, as well as for processing the experimental data obtained during the diagnostics of various characteristics of nanomaterials.
      PubDate: 2022-02-01
       
  • Modification of the Surface of Plastics

    • Free pre-print version: Loading...

      Abstract: The review considers the main methods for modifying plastic as a functional material for the manufacture of biochips as products of the 21st century which make it possible to conduct multiplex assays and to organize so-called laboratories on a chip (lab-on-chip). Physical, chemical, and physical-chemical methods for introducing functional groups to the surface of various polymer materials to impart the desired physical-chemical properties to them (especially to decrease nonspecific sorption on them) and to achieve the effective immobilization of biomolecules and their fragments are considered. The advantages and disadvantages of existing approaches and their applicability to various tasks are discussed.
      PubDate: 2022-02-01
       
  • Frequency and In-Plane Vibration Analysis of Single-Layer Nano-Graphene
           Sheet by Scaled Boundary Finite Element Method

    • Free pre-print version: Loading...

      Abstract: In this paper for the first time, an attempt is made to use the scaled boundary finite element method by considering hexagonal elements corresponding to the structure of graphene honeycomb. Equivalent energy criteria were also used in the simulation. The scale was presented in different boundary conditions for monolayer graphene and in different molecular orientations for degrees of freedom within the plate. The temporal response of the graphene plate to the harmonic point load was also studied. Results have shown good agreement with the results of molecular dynamics and finite element methods. It shows that the natural frequencies of the system decrease with increasing model dimensions. It was also observed that the orientation of molecules has little effect on the natural frequencies of the system. Vibration analysis was also applied to graphene nanofibers under point load for boundary conditions of clamped-free and clamped-clamped at 10 and 100 GHz applied frequencies, which showed more displacement in the clamped-free state than in the clamped-clamped one. In the case of nanofibers, regarding the orientation of molecules, a significant increase in the maximum displacement in the zigzag mode compared to the direction of the armchair at a frequency of 100 GHz could be seen.
      PubDate: 2022-02-01
       
  • Arrays of Nanocomposite Crossbar Memristors for the Implementation of
           Formal and Spiking Neuromorphic Systems

    • Free pre-print version: Loading...

      Abstract: Memristors are promising devices for use as synapses in hardware-based artificial formal and spiking neural networks. Their use can increase the energy efficiency of such networks when solving various cognitive tasks. At the same time, for the implementation of hardware-based neural networks, a large number of rather densely packed structures are required, which can be achieved by creating memristive matrices in a crossbar architecture. Crossbar arrays of nanocomposite memristors on silicon substrates with protection against edge effects are developed and manufactured, their resistive switching is investigated, a formal neural network is created on their basis, which is capable of recognizing simple patterns after loading a pretrained weight map, and the possibility of precise adjustment of the conductivity of the crossbar memristors by various means applicable in the creation of more complex spiking and formal neural networks is demonstrated.
      PubDate: 2022-02-01
       
  • Editorial

    • Free pre-print version: Loading...

      PubDate: 2021-11-01
      DOI: 10.1134/S2635167621060124
       
  • Silver and Copper Alloys for the Top Electrodes of Memristive Structures
           Based on Poly-n-Xylylene

    • Free pre-print version: Loading...

      Abstract: Abstract Comparative characteristics of M/PPX/ITO memristors based on poly-n-xylylene (PPX) with a bottom electrode made of a conductive layer of indium–tin oxide (ITO) and a top active electrode made of copper, silver or their alloy of various compositions (M = Cu, Ag or Ag–Cu). The research results demonstrate that the most stable memristive characteristics are possessed by structures with top electrodes of pure metals.
      PubDate: 2021-11-01
      DOI: 10.1134/S2635167621060239
       
  • Features of Creating Nanostructured TiO2–Al2O3 Layers for Superdense
           Storage Media with an Addressing System Based on Crossbars

    • Free pre-print version: Loading...

      Abstract: — The results of studying the self-organization of TiO2–Al2O3 memristive cells using the anodic oxidation of an aluminum–titanium structure are presented. Original approaches to this process make it possible to precisely control the thicknesses of the functional layers of aluminum and titanium oxides. To form the upper electrode, the use of catalytic chemical deposition is proposed, which allows the porous structure to be filled and an array of conductive buses to be organized on the surface. Measurements of the individual and group electrophysical properties of memristive cells confirm the operability of such structures as part of devices with crossbar addressing.
      PubDate: 2021-11-01
      DOI: 10.1134/S2635167621060045
       
  • Electrical Properties of Silicon-Oxide-Based Memristors on
           Silicon-on-Insulator Substrates

    • Free pre-print version: Loading...

      Abstract: Memristors attract the considerable interest of researchers and engineers due to the prospects for creating new information and computing systems on their basis. First of all, this refers to memristive devices based on the resistive switching (RS) effect, which, in most cases, are fabricated in the form of metal–insulator–metal structures. At the same time, the requirement for compatibility with the basic technological process of manufacturing complementary metal-oxide-semiconductor (CMOS) structures makes it very attractive to fabricate memristive devices directly on a silicon substrate or a silicon-on-insulator (SOI) substrate using standard insulator layers such as silicon oxide. The electrical characteristics and RS of memristors based on SiOx thin films formed on SOI substrates are studied. The memristors under study do not require electroforming. For the first time, the possibility of improving the parameters of the resistive switching of SiOx-based memristors on SOI substrates using laser and heat treatments is shown.
      PubDate: 2021-11-01
      DOI: 10.1134/S2635167621060100
       
  • Memory Properties of SiOx- and SiNx-Based Memristors

    • Free pre-print version: Loading...

      Abstract: Silicon oxide and silicon nitride are the two key dielectrics used in modern silicon devices. The memory properties of SiOx- and SiNx-based memristors obtained by plasma-enhanced chemical vapor deposition, pyrolysis, and high-frequency reactive sputtering are reviewed. The nitrides obtained by high-frequency reactive sputtering have the best memory properties: a memory window of 102, a memristor endurance of up to 109 cycles at the same memory window, and a memristor retention of up to 105 s at the same memory window.
      PubDate: 2021-11-01
      DOI: 10.1134/S2635167621060070
       
  • Heterolayer Memristive Systems for Multibit Memory: The Role of a
           Reservoir of Oxygen Vacancies

    • Free pre-print version: Loading...

      Abstract: Heterolayer memristive systems with a functional aluminum oxide layer obtained by the method of atomic layer deposition are studied. A method is proposed for the arrangement of a reservoir of oxygen vacancies, which ensures the creation of a wide memory window. The proposed method uses oxygen permeable platinum electrodes in combination with an amorphous-silicon-dioxide adsorption sublayer formed by plasma-chemical deposition under the bottom electrode of the structure. It is shown that an amorphous-silicon-dioxide sublayer can play, under certain conditions, the role of a reservoir of oxygen vacancies for the functional sublayer, which provides a reversible change in the concentration of molecular oxygen in the regions adjacent to the electrodes and reversible readjustment of the resistivity of the structure within the range of seven orders of magnitude.
      PubDate: 2021-11-01
      DOI: 10.1134/S2635167621060033
       
  • Memristive Effect in Nitrogen-Doped Carbon Nanotubes

    • Free pre-print version: Loading...

      Abstract: The development of nonvolatile memory is one of the urgent problems of contemporary science due to the rapid evolution of portable electronics. A promising trend in this field is the development of memristor structures able to change their resistance depending on the charge current through a memristor. The memristive effect in nitrogen-doped carbon nanotubes (CNT) is studied. It is established that the ratio between the resistances in high- and low-resistance states grows with an increase in the defectiveness of the carbon nanotubes to attain 4 × 105. It is shown that multilevel switching of the resistance determined by the recording voltage or deformation of a nanotube is possible in carbon nanotubes. The obtained results can be used for developing nonvolatile memory on the basis of CNTs corresponding to the condition of high scalability and multilevel switching.
      PubDate: 2021-11-01
      DOI: 10.1134/S2635167621060082
       
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
 


Your IP address: 3.239.129.91
 
Home (Search)
API
About JournalTOCs
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-