LogicGates
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Researchers take nanowire transistors vertical, double up on density
3D silicon is all the rage, and now nanowire transistors have further potential to keep Moore's Law on life support. Researchers at A*STAR have found a way to double the number of transistors on a chip by placing the atomic-scale wires vertically, rather than in the run-of-the-mill planar mode, creating two "wrap-around gates" that put a pair of transistors on a single nanowire. In the future, the tech could be merged with tunnel field effect transistors -- which use dissimilar semiconductor materials -- to create a markedly denser design. That combo would also burn a miniscule percentage of the power required conventionally, according to the scientists, making it useful for low-powered processors, logic boards and non-volatile memory, for starters. So, a certain Intel founder might keep being right after all, at least for a few years more.
Scientists build logic gates out of gut bacteria, then hopefully wash their hands
Ever thought about upgrading your PC by breeding more cores? Or planting a few GBs of extra storage out in the yard? Us neither, until we heard that scientists at Imperial College in London have succeeded in building "some of the basic components of digital devices" out of genetically modified E.Coli. We've seen these germs exploited in a similar way before, but Imperial's researchers claim they're the first to make bacterial logic gates that can be fitted together to form more complex gates and potentially whole biological processors. Aside from our strange upgrade fantasies, such processors could one day be implanted into living bodies -- to weed out cancer cells, clean arteries and deliver medication exactly where it's needed. So much for Activia.
Researchers develop programmable molecular circuitry for living cells
Researchers at the UCSF School of Pharmacy's Department of Pharmaceutical Chemistry, led by Christopher A. Voigt have just published a paper which promises to get your circuits moving. The team has been working with E. coli bacteria to build logic gates like the ones found in computers directly into cells, making it possible to rewire and program them. The simple logic gates used in the experiment were built into genes then inserted into E. coli cells. The logic gates then acted as the communicator between the separate strains, allowing them to be connected together.The use of logic gates in cells could make it possible to tackle more complicated processes, so that science can begin to use cells at the molecular level for biomedical advances.
