Testing found the system capable of detecting The system is notable because it does not require software installation on the device being tested—detection is done using the external system. It is also notable because it is not susceptible to obfuscation techniques developed by the virus builders to hide its presence. Such a system is not likely to be sold to consumers, however, but it could very well be used for large applications or servers.
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Home Security. DOI: This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Teen hacker claims ability to control 25 Teslas worldwide 8 hours ago.
The movement of ions and electrons through the cathode is relatively slow, making the battery less efficient at releasing energy. Ions and electrons can move through smaller particles more quickly. But fabricating nano-sized particles of iron phosphate is a difficult and expensive process, the researchers say.
By manipulating a gene of the M13 virus to make the viruses coat themselves in iron phosphate, the researchers created very small iron phosphate particles. Tweaking a second gene made one end of the virus bind to carbon nanotubes, which conduct energy well. The resulting network of iron phosphate-coated viruses and carbon nanotubes formed a highly conductive cathode, one that ions and electrons could move through quickly. Army Research Laboratory in Adelphi, Md.
Using different cathode materials could make the future batteries even better, Belcher says. Subscribers, enter your e-mail address for full access to the Science News archives and digital editions. Not a subscriber? Become one now. To celebrate our centennial, we have made our entire archive available for free. But quality journalism comes at a price. Three years ago, an MIT team led by Belcher reported that it had engineered viruses that could build an anode by coating themselves with cobalt oxide and gold and self-assembling to form a nanowire.
In the latest work, the team focused on building a highly powerful cathode to pair up with the anode, said Belcher, the Germeshausen Professor of Materials Science and Engineering and Biological Engineering. Cathodes are more difficult to build than anodes because they must be highly conducting to be a fast electrode, however, most candidate materials for cathodes are highly insulating non-conductive. To achieve that, the researchers, including MIT Professor Gerbrand Ceder of materials science and Associate Professor Michael Strano of chemical engineering, genetically engineered viruses that first coat themselves with iron phosphate, then grab hold of carbon nanotubes to create a network of highly conductive material.
Because the viruses recognize and bind specifically to certain materials carbon nanotubes in this case , each iron phosphate nanowire can be electrically "wired" to conducting carbon nanotube networks. Electrons can travel along the carbon nanotube networks, percolating throughout the electrodes to the iron phosphate and transferring energy in a very short time.
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