نتایج جستجو برای: materials property
تعداد نتایج: 585977 فیلتر نتایج به سال:
The configuration and evolution of coexisting mesoscopic domains with contrasting material properties are critical in creating novel functionality through emergent physical properties. However, current approaches that map the domain structure involve either spatially resolved but protracted scanning probe experiments without real time information on the domain evolution, or time resolved spectr...
One main feature of metamaterials is the occurrence of a negative dynamic mass density that is produced when an inner local resonance is present. The inner resonance can be obtained in composite materials containing composite inclusions. For suitable ratios of the physical properties of the constituting materials, the composite inclusions act as spring-mass systems. The scaling of physical prop...
Ab initio methods allow a more or less straightforward prediction of numerous physical properties of solids, but require the knowledge of their crystal structure. The evolutionary algorithm USPEX, developed by us in 2004-2006, enables reliable prediction of the stable crystal structure without relying on any experimental data. Numerous tests (mostly for systems with up to 28 atoms in the unit c...
This is an advanced course on the study of innovation and entrepreneurship in economic science. We will focus especially on the role of competition and market structure, on the history of technology, on intellectual property, and on incentives for innovation. We will rely on analytical models as well as less formal reasoning. Depending on the topic covered, class will be a combination of lectur...
Covalent organic frameworks (COFs) are a novel class of porous crystalline organic materials assembled from molecular building blocks. The construction principles of these materials allow for the design of precisely controllable structures since their chemical and physical properties can be easily tuned through the selection of the building blocks and the linkage motif. Their extraordinary and ...
The topological materials have attracted much attention for their unique electronic structure and peculiar physical properties. ZrTe5 has host a long-standing puzzle on its anomalous transport properties manifested by its unusual resistivity peak and the reversal of the charge carrier type. It is also predicted that single-layer ZrTe5 is a two-dimensional topological insulator and there is poss...
Graphene is a single-atom thick, two-dimensional sheet of carbon that is characterized by exceptional chemical, electrical, material, optical, and physical properties. As a result, graphene and related materials, such as graphene oxide and reduced graphene oxide, have been brought to the forefront in the field of sensing. Recently, a number of reports have demonstrated that graphene-nanoparticl...
We report the synthesis of copper(II) oxide hollow nanostructures at ambient pressure and close to room temperature by applying the soft templating effect provided by the confinement of droplets in miniemulsion systems. Particle growth can be explained by considering a mechanism that involves both diffusion and reaction control. The catalytic reduction of p-nitrophenol in aqueous media is used ...
The methods of acoustic spectroscopy are powerful tool for the study physical properties of condensed matter. The ability of these methods makes it possible to obtain important information for variety of materials concerning not only their mechanical properties. The theoretical principles of acoustic spectroscopy of some kinds of materials and structures perspective for application in electrica...
Detailed study of the equation of state, elasticity, and hardness of selected superconducting transition-metal nitrides reveals interesting correlations among their physical properties. Both the bulk modulus and Vickers hardness are found to decrease with increasing zero-pressure volume in NbN, HfN, and ZrN. The computed elastic constants from first principles satisfy c11 > c12 > c44 for NbN, b...
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