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高科技啊
科学家利用棉纤维制造出电路和晶体管  我们都知道，棉线是绝缘体，科学家是如何化腐朽为神奇的？原来，棉线只是作为基质使用，为了让它具有导电性，科学家在上面覆盖了不同材料，如金纳米粒子，将其变为导电聚合物。为了将棉线转变为半导体，还需要放进另一种聚合物，并涂上乙二醇使其能防水。保持柔软性的棉线电路具有相当广泛的应用价值，例如棉衣可以成为计算机，内置GPS和传感器等。 分享到：
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最新评论
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xu1020 2012-01-03 18:51
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杨康 2012-01-03 20:30只有想不到 没有做不到
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12511895 2012-01-03 22:46那电子上又多了这两种了！！
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俘光者 2012-01-03 23:38新奇玩意儿，期待其下一步应用！
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mang2004 2012-01-04 00:59原文：
Electronic Cotton
Circuits could be woven from conductive and semiconducting natural fibers
A group of researchers in the United States, Italy, and France have invented transistors made from cotton fibers. They envision such devices being woven into clothing capable of measuring pollutants, T-shirts that display information, and carpets that sense how many people are crossing them. "We want to create a seamless interface between electronics and textiles," says Juan Hinestroza, director of the Textiles Nanotechnology Laboratory at Cornell University, in Ithaca, N.Y.
Instead of attaching sensors or processors to clothing after the garments are fully formed, it would be more effective to incorporate such devices directly into the fabrics, says Annalisa Bonfiglio, an EE professor at the University of Cagliari, in Italy, whose student Giorgio Mattana worked on the cotton in Hinestroza's lab.
The cellulose that makes up cotton is naturally insulating, so to make a fiber conductive, the team coated each strand with gold nanoparticles. They then added a thin layer of a conductive polymer known as PEDOT. The fibers proved to be about a thousand times as conductive as plain cotton, while their mechanical properties remained almost unchanged. They were slightly stiffer but more elastic than untreated fibers, Bonfiglio says. The team demonstrated the treated cotton's conductivity by making a simple circuit, knotting one end to a battery and the other to an LED.
To show the versatility of the process, the researchers created two types of devices: an organic electrochemical transistor and an organic field-effect transistor. For the electrochemical version, conductive cotton fibers were used as source, drain, and gate electrodes. To complete the transistor, the team needed to create a semiconductor. They achieved this by doping the conductive polymer with poly(styrenesulfonate), a polymer commonly used to make proton exchange membranes in fuel cells. After a soak in the second polymer, the cotton fiber was coated with ethylene glycol to make it waterproof.
The field-effect transistor also begins with a conductive cotton strand dipped in the semiconducting polymer, which in this case acts as the gate electrode. But the fiber is then given a thin coat of polymer film that acts as a dielectric, followed by a coat of pentacene, another semiconductor polymer film.
Photo:Textiles Nanotechnology Laboratory at Cornell
UniversityNice Threads: Conductive cotton ties in to a simple circuit. Treating the cotton with these various substances is not as complicated as it sounds; Bonfiglio says it's comparable to dyeing the material. Still, don't expect to see underpants doubling as MP3 players anytime soon. The speed of electrons in these transistors is relatively low compared to that of silicon circuits, says Bonfiglio.
"For the moment, I think the most realistic application is in the sensor area," she says. For instance, firefighters' uniforms might be able to detect dangerous chemicals, while security personnel could be alerted to airborne signatures of explosives or drugs. Garments might also monitor heart rate or perspiration. Inside homes and businesses, fabrics—in the form of carpeting, wall coverings, and upholstery—could keep track of humidity levels and allergens.
"If you think about how many fibers you have in your T-shirt, and how many interconnections you have between the weft and the warp of the fabric, you could get pretty decent computing power," says Hinestroza.
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ghl137 2012-01-04 06:56还是昨天的内容，没有更新
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阿德 2012-01-04 08:27衣服可以做电脑了
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wangmq1 2012-01-04 08:34真佩服这些人的想象力！！
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小猫悖悖 2012-01-04 08:35关注中
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dafeng3210 2012-01-04 08:39li了解一下