Materials scientists and engineers at Northwestern University are developing a new "high-security" steel that would be resistant to bomb blasts such as the one that struck -- and nearly sank -- the USS Cole in Yemen in 2000. The researchers now have a state-of-the-art instrument that enables them to get a precise look at steels composition on the nanoscale: a $2 million atom-probe tomograph that is only the fourth of its kind in the world.
Using the new Local-Electrode Atom-Probe (LEAP®) tomograph, researchers studying steel and other materials can -- at amazing speed -- pluck atoms off a materials surface one at a time, layer by layer over tens of thousands of layers, to better understand the entire nanostructure and chemical composition of the material, which is key to designing new materials effectively and efficiently.
The technology is similar to that used in CT (computed tomography) scans, which image body tissues for medical diagnosis. Consisting of a field-ion microscope plus a special time-of-flight mass spectrometer, an atom-probe tomograph takes multiple pictures and uses those slices to construct a detailed three-dimensional image of the material.
Megan Fellman | EurekAlert!
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Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
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The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....
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Physics supports biology: Researchers from PTB have developed a model system to investigate friction phenomena with atomic precision
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