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标题: 每日科技报告第16期 Energy-Harvesting Rubber Chips Power Pacemakers, Cell Phones [打印本页]

作者: sea_star666 时间: 2010-1-28 19:26
标题: 每日科技报告第16期 Energy-Harvesting Rubber Chips Power Pacemakers, Cell Phones
本帖最后由 sea_star666 于 2010-1-28 19:27 编辑

Power-generating rubber films developed by Princeton University engineers could harness natural body movements such as breathing and walking to power pacemakers, mobile phones and other electronic devices.

Energy-Harvesting Rubber Chips Could Power Pacemakers, Cell Phones

Yi Qi, a postdoctoral researcher at Princeton University, holds a piece of silicone rubber imprinted with super-thin material that generates electricity when flexed. The technology could provide a source of power for mobile and medical devices.

The material, composed of ceramic nanoribbons embedded onto silicone rubber sheets, generates electricity when flexed and is highly efficient at converting mechanical energy to electrical energy. Shoes made of the material may one day harvest the pounding of walking and running to power mobile electrical devices. Placed against the lungs, sheets of the material could use breathing motions to power pacemakers, obviating the current need for surgical replacement of the batteries which power the devices.
A pa-per on the new material was published online Jan. 26, in Nano Letters.
The Princeton team is the first to successfully combine silicone and nanoribbons of lead zirconate titanate (PZT), a ceramic material that is piezoelectric, meaning it generates an electrical voltage when pressure is applied to it. Of all piezoelectric materials, PZT is the most efficient, able to convert 80% of the mechanical energy applied to it into electrical energy.
"PZT is 100 times more efficient than quartz, another piezoelectric material," said Michael McAlpine, a professor of mechanical and aerospace engineering, at Princeton, who led the project. "You don't generate that much power from walking or breathing, so you want to harness it as efficiently as possible."
The researchers first fabricated PZT nanoribbons -- strips so narrow that 100 fit side-by-side in a space of a millimeter. In a separate process, they embedded these ribbons into clear sheets of silicone rubber, creating what they call "piezo-rubber chips." Because the silicone is biocompatible, it is already used for cosmetic implants and medical devices. "The new electricity-harvesting devices could be implanted in the body to perpetually power medical devices, and the body wouldn't reject them," McAlpine said.
In addition to generating electricity when it is flexed, the opposite is true: the material flexes when electrical current is applied to it. This opens the door to other kinds of applications, such as use for microsurgical devices, McAlpine said.
"The beauty of this is that it's scalable," said Yi Qi, a postdoctoral researcher who works with McAlpine. "As we get better at mak-ing these chips, we'll be able to make larger and larger sheets of them that will harvest more energy."
Qi and McAlpine collaborated with Habib Ahmad of the California Institute of Technology along with Noah Jafferis, a Princeton graduate student in electrical engineering; Kenneth Lyons Jr., an undergraduate at Morehouse College who worked in McAlpine's lab; and Christine Lee, an undergraduate at Princeton.

作者: olh2008 时间: 2010-1-28 19:28
都十六期了，要顶一下，呵呵……辛苦了。

作者: 小旋风假 时间: 2010-1-28 20:02
呵呵，楼主确实够辛苦的了，顶一下……………………………………

作者: LM386 时间: 2010-1-28 20:14
好～～～～～～～～～～～～～～～～～～～～～～～

作者: jluzhking 时间: 2010-1-29 19:46
呵呵，微纳电子技术，正是我所学的和必须了解的，感谢数学中国提供这么好的平台

作者: mcm2010modeling 时间: 2010-1-29 23:18
微纳电子技术非常不错的总结资料学习学习谢谢分享

作者: wuhao080910 时间: 2010-2-5 23:16
似乎我们的论文与美国论文差距很大啊！

作者: jamesjenny 时间: 2010-2-6 14:21
差距啊，中国一定要崛起啊、。。。。。。

作者: nwpucrh 时间: 2010-2-6 16:38
斑竹，确实辛苦了，值得好好看一看。

作者: sarah2014 时间: 2010-2-9 12:18
use breathing motions to power pacemakers... 虽然也接触过压电，偶怎么就没有这么奇特的想法。。。the body wouldn't reject them。。。等我老了就要换一个。。。

作者: jsczlwl 时间: 2010-2-11 20:57
差距说不定，说不定只是表达的差别

作者: 反对称的悲伤 时间: 2010-2-19 12:29
这创意……额，就是E文太差看不太懂了

作者: 反对称的悲伤 时间: 2010-2-19 12:30
这创意……额，就是E文太差看不太懂了……

作者: fqlovemadio 时间: 2010-2-20 19:55
好东西 O(∩_∩)O谢谢楼主分享！！！！！！！！

作者: 923050019 时间: 2010-2-22 19:42
恩，呵呵，楼主确实够辛苦的了，顶一下……………………………………

作者: 咫尺天涯 时间: 2010-5-2 17:57
支持！！！！！！！！！！！！！！！

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