Applications include nanotechnology, more
Defects such as cracks in a material are responsible for everything from malfunctioning microchips to earthquakes. Now MIT engineers have developed a model to predict a defects birthplace, its initial features and how it begins to advance through the material.
The model could be especially useful in nanotechnology. "As devices get smaller and smaller, understanding the phenomena of defect nucleation and growth becomes more and more important," said Subra Suresh, head of the Department of Materials Science and Engineering (DMSE). A seemingly minuscule dislocation--a local disorder in the arrangement of atoms inside a material--or a crack can drastically compromise the performance of a device.
"There has been much past work on defects in materials, but no one has really explained how a crack or void nucleates in the first place. This work is a first step to that end," said Suresh, an author of a paper on the work that appeared in a recent issue of Nature.
Elizabeth Thomson | EurekAlert!
New approach to revolutionize the production of molecular hydrogen
22.05.2017 | Technische Universität Dresden
Photocatalyst makes hydrogen production 10 times more efficient
19.05.2017 | Kobe University
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.
In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...
Dental plaque and the viscous brown slime in drainpipes are two familiar examples of bacterial biofilms. Removing such bacterial depositions from surfaces is...
For the first time, scientists have succeeded in studying the strength of hydrogen bonds in a single molecule using an atomic force microscope. Researchers from the University of Basel’s Swiss Nanoscience Institute network have reported the results in the journal Science Advances.
Hydrogen is the most common element in the universe and is an integral part of almost all organic compounds. Molecules and sections of macromolecules are...
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22.05.2017 | Materials Sciences
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22.05.2017 | Physics and Astronomy