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Device Only Atoms Across May Allow Infinitesimal But Powerful Computers
Tampa FL (SPX) Apr 10, 2006 Using the power of modern computing combined with innovative theoretical tools, an international team of researchers has determined how a one-way electrical valve, or diode, made of only a single molecule does its job. Diodes are critical components within computer, audio equipment and countless other electronic devices. If designers can swap existing diodes with the single-molecule one, the products could be shrunk to incredibly small sizes. The technology may allow computer designers to sustain "Moore's Law"--a prediction made by Intel co-founder Gordon Moore in 1965--which suggested technological advances will allow a doubling every 18 months in the number of transistors that can fit on a computer chip. But the "law" has been nearing the end of its useful life as ever-shrinking silicon chips approach their physical limits. Created by a research team at the University of Chicago, the single-molecule diode is merely a few tens of atoms in size and 1,000 times smaller than its conventional counterparts. Recently, theorists from the University of South Florida and the Russian Academy of Sciences have explained the principles that make the device work. The researchers showed electron energy levels in a molecule are efficient channels for transferring electrons from one electrode to another. Because the molecule in the diode is asymmetrical, the electronic response is also asymmetrical when voltage is applied. The asymmetry contributes to a phenomenon called molecular rectification: the channels conduct electrons in one direction, but limit flow in the opposite direction when the voltage polarity reverses. That property makes the molecular diode a potential gatekeeper for circuits and a candidate to one day replace silicon in computer chips. Community Email This Article Comment On This Article Related Links University of South Florida National Science Foundation Computer Chip Architecture, Technology and Manufacture Nano Technology News From SpaceMart.com
Has Silicon Had Its Chips No Say Japanese Inventors
Paris (AFP) Apr 06, 2006The demise of silicon, frequently predicted by analysts who shake their heads over the costs of making pure silicon to meet rising demands for processing power, has been exaggerated, say Japanese inventors. To cram ever more transistors onto a chip, designers need ultra-pure silicon, a substance that is long and extremely costly to make. |
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