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SSS 2009-04-06

时间:2010-05-17 07:09来源:互联网 提供网友:木渐浅。   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute.

 

Batteries of the future need to deliver more energy, and they need to be smaller. Researchers at MIT think they have developed a technology that can, as they say, pave the way for these batteries of the future—using viruses. The development was peer-reviewed in the April 3 issue of the journal Science.

 

Scientists genetically1 engineered a bacteriophage—a virus that infects bacteria but is harmless to humans. A few years ago the team created a virus that coated itself in cobalt oxide2 and gold and self-assembled into a nanowire for the battery’s anode. The cathode’s a little more complicated. In the most recent publication, the team created viruses that coat themselves in iron phosphate and then grab onto carbon nanotubes. This creates a powerful cathode.

 

The working cathode and anode make the virus-battery comparable to more expensive existing battery technologies. The team is now preparing to look into using other materials such as manganese phosphate that could lead to higher voltage. They say this could hold the promise of relatively3 inexpensive, non-polluting, lightweight powerful batteries—a holy grail for an energy revolution.

 

Thanks for the minute for Scientific American's 60-Second Science. I'm Cynthia Graber.

 


点击收听单词发音收听单词发音  

1 genetically Lgixo     
adv.遗传上
参考例句:
  • All the bees in the colony are genetically related. 同一群体的蜜蜂都有亲缘关系。
  • Genetically modified foods have already arrived on American dinner tables. 经基因改造加工过的食物已端上了美国人的餐桌。 来自英汉非文学 - 生命科学 - 基因与食物
2 oxide K4dz8     
n.氧化物
参考例句:
  • Oxide is usually seen in our daily life.在我们的日常生活中氧化物很常见。
  • How can you get rid of this oxide coating?你们该怎样除去这些氧化皮?
3 relatively bkqzS3     
adv.比较...地,相对地
参考例句:
  • The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
  • The operation was relatively painless.手术相对来说不痛。
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