Sol-gel derived lanthanides doped organic-inorganic hybrids for optical applications
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Structure and dynamics of concentrated aqueous solutions of aluminium chloride, beryllium chloride and aluminium bromide: Raman, inelastic neutron scattering and x-ray diffraction results
Recently the following inaccuracies have been detected in the above article: On page 6349, the second line from the bottom x t H 2 O should read ξ t H 2 O . In appendix A, line 4 u1 should read v 1 . In table 4, the caption of the last column ξ t H 2 O /ξ t D 2 O should read ξ t 'H 2 O /ξ t 'D 2 O . In table 4, under…
Manipulation of Electron Beam Propagation by Hetero-Dimensional Graphene Junctions
We demonstrate theoretically a new mechanism for the energy-selective manipulation of electron beam by nanostructured heterodimensional graphene junctions (HDGJs). Beam splitting, collimation, and beam-guide can all be realized by designing HDGJs of different dimensionality, size and orientation. Importantly, these di…
Comparing tube models for predicting the linear rheology of branched polymer melts
The hierarchical and “bob” (or branch-on-branch) models are tube-based computational models recently developed for predicting the linear rheology of general mixtures of polydisperse branched polymers. These two models are based on a similar tube-theory framework but differ in their numerical implementation and details…
Phase separation induced by ladder-like polymer-polymer complexation
Polymer-polymer complexation in solvent is studied using an extension of the self-consistent field theory. The model polymers are capable of forming ladder-like duplex structures. The duplex formation occurs with an abrupt change of entropy, resulting in a first-order transition. Moreover, the complexation can be stab…
Formation of graphene p-n superlattices on Pb quantum wedged islands
On the basis of first-principles calculations within density functional theory, we report on a novel scheme to create graphene p-n superlattices on Pb wedged islands with quantum stability. Pb(111) wedged islands grown on vicinal Si(111) extend over several Si steps, forming a wedged structure with atomically flat top…
Research Guides: Pattern and Ornament: Pattern Reference Books
Illustration II ILLUS 5232 Oren Sherman Selected resources from various cultures and historical periods
Glassy Spin Freezing and Gapless Spin Dynamics in a Spatially Anisotropic Triangular Antiferromagnet Ag2MnO2
Since a quantum mechanical valence bond state wasproposed as the ground state of triangular antiferromag-nets in 1970s [1], triangular lattice systems have been ex-tensively studied, theoretically and experimentally. Forthe spatially isotropic triangular system, there is nowa consensus that even quantum spins are magn…
Correction to Synthesis and Characterization of a Poly(dimethylsiloxane)−Poly(ethylene oxide) Block Copolymer for Fabrication of Amphiphilic Surfaces on Microfluidic Devices
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionORIGINAL ARTICLEThis notice is a correctionCorrection to Synthesis and Characterization of a Poly(dimethylsiloxane)−Poly(ethylene oxide) Block Copolymer for Fabrication of Amphiphilic Surfaces on Microfluidic DevicesScott A. Klasner, Eve C. Metto, Gregory T. Roman, a…
The Structure and Gelation Mechanism of Tunable Guanosine-Based Supramolecular Hydrogels
SLS experiments on 50/50 mixtures of Guanosine (\textbf{G}) and 2',3',5'-Tri-O-Acetylguanosine (\textbf{TAcG)} in aqueous 0.354 M KCl show a sudden increase in molecular weight between c of 0.1 and 0.2 wt{\%}, indicating the critical concentration (Cc) for self-association of \textbf{G/TAcG} quartets into columnar ass…
Dynamics of Main Chain Liquid Crystalline Polysiloxanes Containing $p$-Phenyleneterephthalate Mesogens
The dynamics of three main-chain liquid crystalline polysiloxanes were investigated using broadband dielectric relaxation spectroscopy. The liquid crystalline polymers (LCP) differ regarding the substituents on the rigid mesogens, and the nature of the substituents is found to influence the relaxation behavior. Within…
Coherent Electronic Grating Cavity Modes in Corrugated Ultrathin Metal Films
Stepped semiconductor substrates can serve as a template for growing metal films with a corrugated structure at the nanoscale. The corrugation modulates the electron motion and thus modifies the electronic properties of the system. This work is a study of corrugated films of Ag and Pb using angle-resolved photoemissio…
РОСТ НАНОВИСКЕРА ПОД ВОЗДЕЙСТВИЕМ ЭЛЕКТРОННОГО ПУЧКА: МАТЕМАТИЧЕСКАЯ МОДЕЛЬ
We present mathematical model of nanowhisker growth at the conductor surface in the vacuum chamber of scanning electron microscope under focused electron beam impact. Carbon ions with positive charge come out from chamber surface and are captured by electron beam field. Ions move along electron beam and subside at nan…
Vibration and Wave Propagation in Nano-Composites
As demonstrated in the last chapter, WSFE is found to be an effective computational tool for dynamic analysis of CNTs, both single-and multi-walled. Different continuum shell models were implemented for the analysis. CNTs are however mostly used in conjunction with matrix materials in form of nanocomposites. Such nano-c…
Radiation Terminology and Units
This chapter discusses radiometric parameters, units, and terminology that are commonly used to describe radiation processes. The Systeme International (SI) will be used to define terms and units. Since it would be impractical to treat all parameters here, the list is limited to those definitions necessary to discus…
Vibration and Wave Propagation in Carbon Nanotubes
This chapter explains the application of WSFE developed for one-and twodimensional nanotube waveguides to study vibration and wave properties of carbon nanotubes (CNTs). Over the last decade, with the advent of nanostructured material, a large group of researchers in computational mechanics are directing their efforts…
Διάβρωση και μηχανική καταπόνηση κράματος Al7075 T6
Διάβρωση κράματος Al7075 T6 σε διάλυμα NaCl 0,01 και pH=7,5. Ακόλουθες δοκιμές εφελκυσμού και μελέτη των αποτελεσμάτων.
Microstructural evolution after cellular precipitation in a high nitrogen austenitic steel
Gli acciai inossidabili austenitici presentano notevoli proprietà di resistenza alla corrosione e buona formabilità. Gli acciai inox tradizionali, però, presentano dei limiti: economici collegati al crescente costo del Nichel, meccanici per il basso carico di snervamento e di biocompatibilità a causa delle allergi…
Temperature dependence of the thermal conductivity of thin silicon nanowires
ABSTRACT We compute the lattice thermal conductivity (κ) of silicon nanowires as a function of temperature bymolecular dynamics simulations. In wires with amorphous surfaces κmay reach values close to that of amorphous silicon and is nearly constant between 200 and 600 K; this behavior is determined by the presence of…
First Principles Design of Functional Materials for Energy Applications
Materials design using first-principles techniques is one the ultimate goals in computational materials science. Due to the recent advancement in first-principles electronic structure theory and computing power, it is now possible to perform knowledge-based computational design of materials with unique optical, electr…