Materials Literature
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This paper provides results of numerical simulations of graphene conductivity. The numerical results were performed in tight-biding model with Coulomb potential screened by σ electron of carbon atoms. The dependence of the graphene conductivity on the dielectric permittivity of substrate was calculated. The results ag…
The project investigated the local mechanical behavior of metal grain boundaries with and without the influence of a segregated alloy element, specifically in the Fe-C alloy system. Local deformation was carried out using nano-indentation with varying indentation-grain boundary geometry and strain rate. Stress relaxat…
The comments of both reviewers indicate that our manuscript was flawed due to poor definition and inconsistent use of a number of terms in the paper. For example, we clearly were not consistent or even always correct in our use of the 'clay' as a particlesize designator on the one hand and as a descriptor of crystalli…
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The process of bringing a costume from sketch to finished product requires a team effort. To transform an actor into a character, each artisan works closely with the designer. Each artisan&s;s unique viewpoint and set of skills complements the efforts of their colleagues. The final product becomes transformative, more…
We demonstrate and approximate the effects of bromide ions on hydrogen peroxide generation under conditions of low oxygen concentration and over pressure of hydrogen. As has been shown these are conditions for which hydrogen peroxide generation is strongly reduced. We find that this reduction is strongly canceled by t…
The influence of initial porosity of copper powder billets on values of ultimate degrees of deformation at uniaxial tension, compression and torsion has been investigated theoretically and experimentally. The technique of determination of ultimate degrees of deformation for powder materials using results of compressio…
We report our non-perturbative study of the vacuum strucuture of the quasiparticles in graphene with a charge impurity. Using the bosonization method, which takes the multi body effect into account, we compute the induced charge screening. Our study will be useful to understand the electric property of the graphene an…
Intergrowth bismuth layered structure ferroelectrics (BLSFs) in the system SrO-Bi2O3-TiO2 have been investigated with an objective to improve the dielectric and ferroelectric properties of them. There are three BLSFs in this system namely Bi4Ti3O12 (BIT), SrBi4Ti4O15 (SBTi4) and Sr2Bi4Ti5O18 (SBTi5) and one stable int…
Mechanical responses of soft particle packings to quasi-static deformations are determined by the microscopic restructuring of force-chain networks, where complex non-affine displacements of constituent particles cause the irreversible macroscopic behavior. Recently, we have proposed a master equation for the probabil…
Abstract The affinity cryo-electron microscopy (cryo-EM) approach has been explored in recent years to simplify and improve the sample preparation for cryo-EM. Despite the demonstrated successes for low-concentration and unpurified specimens, the lack of near-atomic structures using this approach has led to a common p…
In order to replace a conventional air-conditioner (AC) based on vapour compression technology that directly has high global warming potential and also currently consumes the most fossil fuel primary energy in building sector of tropical countries for generating thermal comfort on sleeping purpose, other alternative g…
Hysteresis loops at room temperature have been observed and investigated in nanostructures and nanoparticles ofCupric Oxide (CuO) with same average grain size. Morphological and structural properties of the studied sampleswere characterized using x-ray diffraction (XRD) and scanning electron microscopy (SEM). Energy-d…
The article gives a review on measurements of cobalt surface area (SgCo) by a method of dissociative hydrogen chemisorption which is a reversible process. It is therefore suitable to use techniques which enable one to determine amounts of both reversibly and irreversibly chemisorbed entities. This requirement is fulfi…
We obtain a nonequilibrium theory for a simple model of a generic class of active dense systems consisting of self-propelled particles with a self-propulsion force, $f_0$, and persistence time, $τ_p$, of their motion. We consider two models of activity and find the system is characterized by an evolving effective temp…
In the chiral phase transition of massless two flavor QCD, the axial U(1) anomaly may play an important role. We investigate the nature of the transition in the presence of a finite U A (1) breaking by calculating the renormalization group (RG) flow of the effective theory describing massless two flavor QCD at the cri…
Main objective of this final work was to describe high speed cutting process and to show examples of high speed lathe machines. At first, it is described high speed cutting process and their specificity. Then main requirements are shown in terms of achievable speed. After that turning machines and modules of machine t…
Aroylhydrazones derived from nicotinic acid hydrazide and differently substituted benzaldehydes (Scheme 1) were prepared according to the published procedure [1]. Such compounds can be involved in keto-enol tautomeric interconversion. Different tautomeric forms have different spectral properties and can be distinguish…
Durch detaillierte Untersuchung der physikalischen Prozesse, die der Wirkungsweise von Polymer-Solarzellen zu Grunde liegen, und der daran gekoppelten Entwicklung neuer Materialien konnte der Energiekonversionswirkungsgrad von organischen Solarzellen bereits deutlich gesteigert werden. Die für diese Technologie hohen…
For the first time, we received and studied the spectral properties of AgCl nanocrystals in fluorine phosphate glass. It was shown that the increase of heat treatment duration leads to the long -wavelength shift of the exciton absorption band and the increase of its intensity. The average size of the AgCl nanocrystals…