[E&S] 纳米线技术是否会改变世界？

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[E&S] 纳米线技术是否会改变世界？

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The Earth & Sky radio series began broadcasting in 1991, on a few dozen radio stations scattered throughout the U.S.

Now, over three million people learn about sustaining a vibrant and healthy planet everyday at Earth & Sky. Our radio program is heard each day on more than 1,000 radio affiliates in the U.S., with an equally large audience overseas. In September 2006, we'll celebrate 15 years on the air and will produce the 5,000th science radio show. But if you heard our very first segment of Earth & Sky, it would have sounded like this:

"I'm Joel Block..."
"I'm Deborah Byrd..."
"...and this is Earth and Sky.

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A nanometer is a billionth of a meter.

And nanowires are invisibly small wires less than a hundred nanometers wide. Nanowaires might someday enable your computer to have a hundred times more memory than it does now. Stuart Parkin is an experimental physicist at IBM's Almaden Research Center in San Jose, California. He has invented a memory device using nanowires.

"Well, my goal, my job, is to try to think of new ways of taking new science, new physics, new materials and to try to create new types of prototype devices that are radically superior to anything that could possibly be imagined."

In this case, Parkin has invented a new way to store information on computers, what he calls "racetrack memory". The advantage of racetrack memory, he said, is that it can store enormous quantities of data, which you can access very quickly. His invention places tiny nanowires upright on a silicon chip, like a tree.

"Yes, that's right. We're going to store information in the trunk of that tree. And we are going to run the information up and down, if you like, the tree trunk."

Parkin emphasized that there are still problems to be worked out. But he said his racetrack memory should help make computer memory cheaper, and make computers faster, smaller and more reliable.

Our thanks today to the National Science Foundation. We're Block & Byrd for Earth & Sky.