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September 2007

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leslie fairfax <[log in to unmask]>
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Miami University conversation <[log in to unmask]>
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Thu, 13 Sep 2007 18:44:53 +0000
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Just this April, a large cross-departmental group of Stanford faculty was awarded a multi-million dollar grant to take up such challenges and develop new devices and technology for use in 3-D ICs. Chidsey, for instance, is one of the researchers involved in integrating nanowire transistors into 3-D circuits, which requires being able to position nanowires reliably and accurately. With the development of 3-D ICs, you can expect all-in-one MP3 player-telephone-digital camera-PDA devices the size of Star Trek communicators to hit the shelves at Fry's within this decade.








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As a term, nanotechnology is clearly ambiguous. Moreover, it has already been claimed by the Drexlerians, apostles of K. Eric Drexler, who was one of the first to popularize nanotechnology with the publication of his 1987 book, Engineers of Creation: The Coming Era of Nanotechnology. According to Professor Steve Block, the Drexlerians have a futurist vision of nanotechnology in which self-replicating molecular assemblers programmed at the molecular-scale manufacture arbitrary products at the atomic level, molecule by molecule, bottom up. Some scientists have attempted to distance themselves from the futurist Drexlerians by claiming the term nanoscience. There's also another motivation for the excision of "technology" in this term. Nanoscience, as a term, captures the learning-the fundamental understanding of processes and materials at the nanoscale-that many scientists feel is necessary before or at the same time that researchers turn to engineering solutions. The term nanote
 chnology, on the other hand, reinforces what Chidsey describes as a "glib attitude" that "technology is the goal of science at this length scale."
Yet, there remains a problem with the "nano" in both nanoscience and nanotechnology. "Nanotechnology's a term with not too much new in it. It existed a long time ago," says Dai. Indeed, the characteristic length of bonds that have always been under scrutiny in the molecular sciences is on the order of a nanometer. Chidsey adds, "I worry that the term confuses people about what's important: the length scale itself is not important." Rather, it is the novel properties that structures exhibit at the nanoscale that is. As Dai puts it, "We work on carbon nanotubes not because they are small, but because they are interesting. They just happen to be nano." For all the problems with the term nanotechnology, though, it may have done some good. Chidsey remarks, "Just as nanotechnology has attracted the attention of outsiders, it also stimulates us internally: it provides a context for tackling and defining grand challenges-things so out there you wouldn't tackle them otherwise."

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