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Like Fish on Waves: Electrons Go Surfing

Published: September 22, 2011.
By Ruhr-University Bochum
http://www.ruhr-uni-bochum.de

Physicists at the RUB, working in collaboration with researchers from Grenoble and Tokyo, have succeeded in taking a decisive step towards the development of more powerful computers. They were able to define two little quantum dots (QDs), occupied with electrons, in a semiconductor and to select a single electron from one of them using a sound wave, and then to transport it to the neighbouring QD. A single electron "surfs" thus from one quantum dot to the next like a fish on a…


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chemistry
Classical Enzymatic Theory Revised by Including Water Motions
Enzymes are macromolecular biological catalysists that lead most of chemical reactions in living organisms. The main focus of enzymology lies on enzymes themselves, whereas the role of water motions in mediating the biological reaction is often left aside owing to the complex molecular behavior. The groups of Martina Havenith (Cluster of Excellence RESOLV - Ruhr explores Solvation) and Irit Sagi (Weizmann Institue of Science, Israel) revised the classical enzymatic steady state theory by including long-lasting protein-water coupled motions into models of functional catalysis.…
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How Stress Aids Memory
Retrieving memory content under stress does not work very well. However, stress can be helpful when it comes to saving new information -- especially those that are emotionally relevant in stressful situations. At the Ruhr-Universitat Bochum, a team of cognitive psychologists headed by Prof Dr Oliver T. Wolf study these correlations. The RUB's science magazine RUBIN reports on the results. Faked Job Interview Triggers Stress
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Susceptibility for Relapsing Major Depressive Disorder Can Be Calculated
Selver Demic and his colleagues from the Mercator Research Group have set out to find out more about the causes of depression. "Approx. 20 per cent of the population will suffer a de-pressive episode in the course of their lives," says Demic. "This cohort of 20 per cent includes people who will never again experience any problems after that one-time episode is over. The others, however, will suffer repeatedly or chronically under the disorder, despite taking appropriate medication. We want to use our…
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A Glimpse into the 3-D Brain: How Memories Form
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