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  Subjects -> ENGINEERING (Total: 1971 journals)
    - CHEMICAL ENGINEERING (154 journals)
    - CIVIL ENGINEERING (150 journals)
    - ELECTRICAL ENGINEERING (83 journals)
    - ENGINEERING (1117 journals)
    - ENGINEERING MECHANICS AND MATERIALS (294 journals)
    - HYDRAULIC ENGINEERING (46 journals)
    - INDUSTRIAL ENGINEERING (52 journals)
    - MECHANICAL ENGINEERING (75 journals)

ENGINEERING (1117 journals)            First | 5 6 7 8 9 10 11 12 | Last

Mathematics of Control, Signals, and Systems (MCSS)     Hybrid Journal   (Followers: 5)
Mauerwerk     Hybrid Journal  
Measurement     Hybrid Journal   (Followers: 1)
Measurement Science Review     Open Access   (Followers: 1)
Meccanica     Hybrid Journal   (Followers: 1)
Mechatronics     Hybrid Journal   (Followers: 4)
Medical and Biological Engineering and Computing     Hybrid Journal   (Followers: 2)
Medical Engineering & Physics     Hybrid Journal   (Followers: 9)
Membrane Science and Technology     Full-text available via subscription   (Followers: 2)
Membrane Technology     Full-text available via subscription   (Followers: 1)
Memetic Computing     Hybrid Journal  
Metal Powder Report     Full-text available via subscription   (Followers: 2)
Metallurgist     Hybrid Journal   (Followers: 2)
Metaphysica     Hybrid Journal   (Followers: 1)
Metascience     Hybrid Journal   (Followers: 1)
Metrologia     Full-text available via subscription   (Followers: 1)
Microelectronic Engineering     Hybrid Journal   (Followers: 4)
Microelectronics International     Hybrid Journal  
Microelectronics Journal     Hybrid Journal   (Followers: 4)
Microelectronics Reliability     Hybrid Journal   (Followers: 6)
Microfluidics and Nanofluidics     Hybrid Journal   (Followers: 9)
Micromachines     Open Access   (Followers: 1)
MNASSA : Monthly Notes of the Astronomical Society of South Africa     Full-text available via subscription   (Followers: 1)
Modelling and Simulation in Engineering     Open Access   (Followers: 4)
Modern Applied Science     Open Access   (Followers: 1)
Molecular BioSystems     Full-text available via subscription   (Followers: 1)
Molecular Engineering     Hybrid Journal  
Molecular Pharmaceutics     Full-text available via subscription   (Followers: 9)
MRS Bulletin     Full-text available via subscription   (Followers: 5)
MRS Online Proceedings     Full-text available via subscription   (Followers: 1)
Multiagent and Grid Systems     Hybrid Journal  
Multidimensional Systems and Signal Processing     Hybrid Journal  
NANO     Hybrid Journal   (Followers: 6)
Nano Letters     Full-text available via subscription   (Followers: 42)
Nano Research     Hybrid Journal   (Followers: 4)
Nano Reviews     Open Access   (Followers: 15)
Nanopages     Full-text available via subscription   (Followers: 1)
Nanoscale and Microscale Thermophysical Engineering     Hybrid Journal   (Followers: 3)
Nanoscale Systems : Mathematical Modeling, Theory and Applications     Open Access  
Nanoscience and Nanoengineering     Open Access  
Nanotechnologies in Russia     Hybrid Journal   (Followers: 1)
Nanotechnology     Hybrid Journal   (Followers: 9)
Nanotechnology Magazine, IEEE     Full-text available via subscription   (Followers: 14)
Nanotechnology Reviews     Full-text available via subscription   (Followers: 4)
Natural Hazards     Hybrid Journal   (Followers: 231)
Nature Nanotechnology     Full-text available via subscription   (Followers: 45)
Naval Engineers Journal     Hybrid Journal   (Followers: 3)
NDT & E International     Hybrid Journal   (Followers: 12)
Nexo Revista Científica     Open Access  
Nigerian Journal of Technological Research     Full-text available via subscription  
Nigerian Journal of Technology     Full-text available via subscription  
NIR news     Full-text available via subscription  
Nonlinear Dynamics     Hybrid Journal   (Followers: 5)
Nonlinear Engineering : Modeling and Application     Full-text available via subscription   (Followers: 1)
Nonlinearity     Full-text available via subscription   (Followers: 2)
Nova Scientia     Open Access  
NTM Zeitschrift für Geschichte der Wissenschaften, Technik und Medizin     Hybrid Journal   (Followers: 4)
Nuclear Engineering and Design     Hybrid Journal   (Followers: 12)
Numerical Algorithms     Hybrid Journal   (Followers: 2)
Numerical Heat Transfer, Part A: Applications: An International Journal of Computation and Methodology     Hybrid Journal   (Followers: 5)
Numerical Heat Transfer, Part B: Fundamentals: An International Journal of Computation and Methodology     Hybrid Journal   (Followers: 7)
Ocean Science Journal     Hybrid Journal   (Followers: 3)
Oil and Gas Journal     Full-text available via subscription   (Followers: 11)
Online Journal for Global Engineering Education     Open Access  
Open Journal of Fluid Dynamics     Open Access   (Followers: 3)
Open Journal of Safety Science and Technology     Open Access   (Followers: 3)
Operations Research Letters     Hybrid Journal   (Followers: 5)
Optical Communications and Networking, IEEE/OSA Journal of     Hybrid Journal   (Followers: 4)
Optimization and Engineering     Hybrid Journal   (Followers: 3)
Opto-Electronics Review     Hybrid Journal   (Followers: 1)
OR Spectrum     Hybrid Journal  
Organic Electronics     Hybrid Journal   (Followers: 3)
Ozone Science & Engineering     Hybrid Journal   (Followers: 1)
Papers In Regional Science     Hybrid Journal   (Followers: 6)
Particle & Particle Systems Characterization     Hybrid Journal  
Particulate Science and Technology: An International Journal     Hybrid Journal   (Followers: 1)
Perspectives on Science     Hybrid Journal   (Followers: 4)
Pesquisa Operacional     Open Access  
Pest Management Science     Hybrid Journal   (Followers: 5)
Petroleum Science     Full-text available via subscription   (Followers: 2)
Phase Transitions: A Multinational Journal     Hybrid Journal  
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences     Full-text available via subscription   (Followers: 5)
Physica B: Condensed Matter     Hybrid Journal   (Followers: 5)
Physica C: Superconductivity     Hybrid Journal  
Physica D: Nonlinear Phenomena     Hybrid Journal   (Followers: 3)
Physics of Fluids     Hybrid Journal   (Followers: 24)
Planning News     Full-text available via subscription   (Followers: 3)
Plasma Devices and Operations     Hybrid Journal   (Followers: 3)
Plasma Science and Technology     Full-text available via subscription   (Followers: 2)
Plasmonics     Hybrid Journal  
Platinum Metals Review     Open Access   (Followers: 2)
Polar Research     Open Access   (Followers: 1)
Polar Science     Hybrid Journal   (Followers: 3)
Polímeros: Ciência e Tecnologia     Open Access   (Followers: 1)
Polish Maritime Research     Open Access  
Polymer Engineering & Science     Hybrid Journal   (Followers: 13)
Polymer International     Hybrid Journal   (Followers: 2)
Polymer Science Series A     Hybrid Journal   (Followers: 3)
Polymer Science Series B     Hybrid Journal   (Followers: 3)
Polymer Science Series C     Hybrid Journal   (Followers: 4)

  First | 5 6 7 8 9 10 11 12 | Last

Journal Cover Polymer Science Series C
   Journal TOC RSS feeds Export to Zotero [6 followers]  Follow    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
     ISSN (Print) 1555-614X - ISSN (Online) 1811-2382
     Published by Springer-Verlag Homepage  [2209 journals]   [SJR: 0.187]   [H-I: 10]
  • Branched triphenylamine-based oligomers for organic electronics
    • Abstract: Abstract This review involves discussion and analysis of the main advantages and trends of the molecular design of branched triphenylamine-based oligomers and their application in modern organic electronics devices, such as organic solar cells, light-emitting diodes, thin-film field-effect transistors, and sensors.
      PubDate: 2014-09-01
       
  • Electroluminescent lanthanide-containing polymers
    • Abstract: Abstract The data on the synthesis and physicochemical and photo- and electroluminescent properties of carbochain linear polymers containing ions of rare-earth metals bound via chemical or coordination bonds to the polymer chain are summarized. The effects of the ligand environment at lanthanide atoms and the structures of the polymers on their luminescence activity are considered. Possible approaches to increase the efficiency of electroluminescence of polymer lanthanide emitters are discussed.
      PubDate: 2014-09-01
       
  • Light-emitting transistor structures based on semiconducting polymers and
           inorganic nanoparticles
    • Abstract: Abstract One of the new directions in organic electronics is the development of light-emitting organic field-effect transistors, which combine the light-emitting properties of organic light-emitting diodes and the switching properties of organic field-effect transistors. Optical and electronic properties of novel nanocomposite materials based on semiconducting polymers and inorganic nanoparticles and designed for applications in organic electronics devices were investigated. Light-emitting organic field-effect transistors with composite active layers based on the soluble semiconducting polymers PFO and MEH-PPV and ZnO nanoparticles and having asymmetric electrodes (Al and Au) that inject electrons into ZnO and holes into PFO and MEH-PPV were prepared and investigated. The data are interpreted in the context of the possibility of organic field-effect transistors based on PFO: ZnO and MEH-PPV: ZnO composite films to work in both the unipolar regime and the ambipolar regime. It is shown that the mobility of charge carriers in light-emitting organic field-effect transistors based on PFO: ZnO at 300 K reaches ∼0.02 for electrons and ∼0.03 cm2/(V s) for holes, increasing with an increase in the concentration of nanoparticles up to ∼2 cm2/(V s), a value that is comparable to the maximum mobility values for conducting polymers. Light-emitting organic field-effect transistors based on PFO: ZnO and MEH-PPV: ZnO emit light in the green and orange ranges of the optical spectrum, respectively, their electroluminescence intensities rising with an increase in either the negative bias or the positive bias at the source-drain and the gate as well as with an increase in the concentration of ZnO nanoparticles. The results indicate that light-emitting organic field-effect transistors based on soluble conjugated polymers and semiconducting ZnO nanoparticles are examples of multifunctional devices whose production technology is compatible with the modern ink-jet printing technology of organic electronics.
      PubDate: 2014-09-01
       
  • Solution processable semiconducting organic single crystals
    • Abstract: Abstract In this review we describe recent progress in fabrication, characterisation and measurements of solution processed organic single crystals based on small molecule semiconductors. We focus on single crystal applications using Field-Effect Transistors as building blocks for organic electronics.
      PubDate: 2014-09-01
       
  • Common approaches to the synthesis of tetrapyrrole macroheterocyclic
           compounds: Promising materials for photovoltaic devices
    • Abstract: Abstract The main trends in the development of the synthesis of tetrapyrrole macroheterocyclic compounds, whose functionalization makes it possible to control the properties of formed porphyrin-containing materials applied in molecular electronics for improvement of photovoltaic properties, are presented in this review.
      PubDate: 2014-09-01
       
  • Non-fullerene acceptors for organic solar cells
    • Abstract: Abstract Solar cells based on organic semiconductor molecules are a promising alternative to conventional silicon photocells owing to their low cost, simple production, and good mechanical properties. Effective organic photocells are based on a heterojunction using an active layer consisting of two different organic semiconductors, one of which is an electron donor, while the other is an acceptor. Progress in organic photovoltaics is related to the development of new donor materials, while fullerene derivatives are commonly used as acceptors. The advantages and disadvantages of fullerene compounds for organic solar cells are discussed in this review, the principles of their operation are briefly considered, and the most successful new non-fullerene acceptors are described. The application of latter acceptors has made it possible to fabricate organic solar cells with an efficiency of about 2–4%.
      PubDate: 2014-09-01
       
  • Self-assembled organic semiconductors for monolayer field-effect
           transistors
    • Abstract: Abstract Recent data on the structures and properties of self-organized molecules used for the production of the semiconducting layer in self-assembled organic monolayer field-effect transistors are reviewed. Methods for fabrication of these transistors are presented together with their advantages and shortcomings. Electric characteristics of the produced devices are compared. Major structural regularities for selection of the reactive group in self-organized semiconductor oligomer molecules are elucidated with respect to the type of substrate.
      PubDate: 2014-09-01
       
  • Recent trends in crystal engineering of high-mobility materials for
           organic electronics
    • Abstract: Abstract Acenes and heteroacenes are receiving great attention in fundamental and applied science due to their interesting optoelectronic and charge transport properties. Their easy synthesis and functionalization have enabled the rapid development of a large number of molecular materials with remarkable charge-transport properties. This perspective provides an overview of their fundamental properties, molecular packing/morphology and charge transport properties and summarizes the progress made in recent years in the development of new high-mobility small-molecule materials focusing in particular on crystalline materials that have been able to approach or surpass mobilities of amorphous silicon.
      PubDate: 2014-09-01
       
  • Recent advances in organic electronics materials and devices
    • PubDate: 2014-09-01
       
  • PEDOT-properties and applications
    • Abstract: Abstract Poly(3,4-ethylenedioxythiophene) (PEDOT) is an intrinsically conductive polymer that is used in a wide range of applications such as antistatics, capacitors, touch panels, organic light emitting diodes, organic solar cells and printed electronics. This paper describes the characteristic parameters of 31 different commercially available PEDOT dispersions. It shows how the PEDOT dispersions have been tailored to each of those applications and thereby the opportunities and limitations of this material.
      PubDate: 2014-09-01
       
  • Polyaniline: Synthesis, properties, and application
    • Abstract: Abstract The methods of synthesis and the properties of polyaniline—a representative of the family of conducting polymers—are reviewed briefly. It is shown that variation in the conditions of aniline polymerization makes it possible to synthesize polymer materials with the desired structures and properties and, thus, to provide for the use of polyaniline in various fields of science and engineering. Special attention is given to the matrix synthesis of polyaniline as the main approach to obtain electroactive and conducting composite materials. The use of polyaniline and the related composite materials in polymer electronics is analyzed briefly.
      PubDate: 2014-09-01
       
  • Atomistic simulations of cavitation in a model polyethylene network
    • Abstract: Abstract A molecular-level understanding of cavitation in polymer networks upon imposition of mechanical stress is still lacking. Molecular Dynamics simulations of crosslinked amorphous Polyethylene (PE) were conducted in order to study cavitation as a function of the prevailing stress. We first show that the characteristic relaxation times related to tube confinement and chain connectivity can be obtained by examining the mean square displacement of middle chain monomers. Then, we present a methodology for predicting the cavitation strength and understanding its dependence on cohesive interactions and entropic elasticity. Our simulations show that experimental observations and predictions of continuum mechanics analysis, which relate the critical stress for cavitation to the Young’s modulus of the rubber, are in agreement with the observed tensile triaxial stress below which a pre-existing cavity cannot survive in a cavitated sample.
      PubDate: 2013-09-01
       
  • A model for rod-coil block copolymers
    • Abstract: Abstract A coarse-grained model for studying the phase behavior of rod-coil block copolymer systems on mesoscopic length scales is proposed. The polymers are represented on a particle level (monomers, rods) whereas the interactions between the system’s constituents are formulated in terms of local densities. This conversion to density fields allows an efficient Monte Carlo sampling of the phase space. We demonstrate the applicability of the model and of the simulation approach by illustrating the formation of typical micro-phase separated configurations for exemplary model parameters.
      PubDate: 2013-09-01
       
  • Orientational ordering in blends of flexible and rigid diblock copolymers
    • Abstract: Abstract A self-consistent mean-field computer simulation of ordering in blends of flexible and rigid rodlike diblock copolymers is performed. Each type of rigid block is selective toward one of the types of flexible blocks and is incompatible with the other. Flexible diblocks form a predominant component of the blend with parameters providing formation of a stable hexagonal morphology. As a result, orientational ordering is induced in the blend by a minor admixture of rigid diblocks, while the type of ordering is determined by the composition of the rigid diblocks. Three different types of orientational ordering, which having a clearly pronounced electromagnetic analogy, are established during variation in the composition of the rigid diblocks. Near a cylindrical micelle of the hexagonal morphology, the vector fields of primary directions of the orientational-order-parameter tensors for the three orientation types are highly similar to the magnetic field of the infinitely long rectilinear direct current, the cylindrical solenoid magnetic field with a constant linear current density, and the electrostatic field of a uniformly charged straight line, respectively.
      PubDate: 2013-09-01
       
  • A simplified treatment of the deformations of covalent bonds and angles
           during the all-atom Monte Carlo simulation of polymers
    • Abstract: Abstract A new approach to the Monte Carlo simulation of high-molecular weight compounds is given. It is shown within the generalized ensemble concept that the energy of deformation of covalent bonds and angles can be excluded from consideration. The consistency of the chemical structure of the molecule is retained by sorting out the trial configurations, which does not violate the detailed balance. The efficiency of the suggested approach is confirmed via calculations of the structural features of various molecules with the use of Hamiltonian exchange for a two-parameter system of Markov chains.
      PubDate: 2013-09-01
       
  • Entropic sampling of polymers: A chain near a wall, polyelectrolytes,
           star-shaped polymers
    • Abstract: Abstract Results of entropic sampling of several polymer systems are presented: a neutral chain at a flat surface; a polyelectrolyte at a charged flat surface; a system of two neutral chains or of two polyions; and star polymers. Both lattice and continuous models for chains are used. The method enables the energy distribution to be obtained in a very wide range of values, which in turn allows the thermal and structural properties of the systems to be calculated in a wide temperature range.
      PubDate: 2013-09-01
       
  • Applications of the Wang-Landau algorithm to phase transitions of a single
           polymer chain
    • Abstract: Abstract The Wang-Landau (WL) algorithm is a Monte Carlo simulation technique providing a direct computation of the density of states of a many-body system. The temperature independent density of states function encodes all thermodynamic information about a system, and thus, its construction allows for a very efficient determination of phase behavior. Here we describe the application of the WL approach to continuum interaction-site polymer chains and compute single-chain phase diagrams for three specific models (flexible and semiflexible homopolymer chains built from square-well sphere monomers and a flexible AB-heteropolymer comprised of alternating square-well and hard-sphere monomers). We provide details on the implementation of the WL algorithm, the underlying Monte Carlo move set, and the subsequent thermodynamic and structural analysis required to characterize phase behavior.
      PubDate: 2013-09-01
       
  • Recent developments in computer modeling of polymer systems
    • PubDate: 2013-09-01
       
  • Mathematical simulation of lysine dendrimers: Temperature dependences
    • Abstract: Abstract The mathematical simulation of second- and fourth-generation lysine dendrimers is performed via the molecular-dynamics method. Temperature dependences of primary structural characteristics are obtained. It is shown that the sizes and atomic distributions of these dendrimers are weakly temperature-dependent. Together with the structural properties, the local mobility of CH2 groups in the dendrimers is investigated via the molecular-dynamics method and NMR spectroscopy. It is shown that the orientational mobility of internal groups of the lysine dendrimers is lower than that of terminal groups, in agreement with the data available for flexible-chain dendrimers. Changes in correlation times with temperature are well described by the Arrhenius dependence. At the same time, the orientational mobility of internal groups in the lysine dendrimers depends on the generation number. This behavior is different from that of flexible-chain dendrimers, in which the mobility of internal groups is the same for dendrimers of different generations.
      PubDate: 2013-09-01
       
  • Translocation dynamics of a semiflexible chain under a bias: Comparison
           with tension propagation theory
    • Abstract: Abstract We study translocation dynamics of a semi-flexible polymer through a nanoscopic pore in two dimensions (2D) using Langevin dynamics simulation in presence of an external force inside the pore. We observe that for a given chain length N the mean first passage time (MFPT)〈τ〉 increases for a stiffer chain. By repeating the calculation for various chain lengths N and bending rigidity parameter κ b we calculate the translocation exponent α (〈τ〉 ∼ N α). For chain lengths N and bending rigidity κ b considered in this paper we find that the translocation exponent satisfies the inequality α < 1 + ν, where is the equilibrium Flory exponent for a given chain stiffness, as previously observed in various simulation studies for fully flexible chains. We observe that the peak position of the residence time W(s) as a function of the monomer index s shifts at a lower s-value with increasing chain stiffness κ b . We also monitor segmental gyration 〈R g (s)〉 both at the cis and trans side during the translocation process and find that for κ b ≠ 0 the late time cis conformations are nearly identical to the early time trans conformations, and this overlap continues to increase for stiffer chains. Finally, we try to rationalize dependence of various quantities on chain stiffness κ b using Sakaue’s tension propagation (TP) theory [Phys. Rev. E 76, 021803 (2007)] and Brownian Dynamics Tension Propagation (BDTP) theory due to Ikonen et al. [Phys. Rev. E 85 051803 (2012); J. Chem. Phys. 137 085101 (2012)] originally developed for a fully flexible chain to a semi-flexible chain.
      PubDate: 2013-09-01
       
 
 
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