官方APP下载:英语全能特训(微信小程序版,支持苹果手机、安卓手机)
创办于2003年
UNSV记不住?那就记中文谐音“忧安思危”吧!
  Slow and Steady Wins the Race!
UNSV英语学习频道 - Slow and steady wins the race!
公众微信服务号
英语全能特训(微信公众服务号)
UNSV英语学习频道淘宝网店
客服短信:18913948480
客服邮箱:web@unsv.com
初级VIP会员
全站英语学习资料下载。
¥98元/12个月

SCIENCE REPORT - Tiny Transistor

阅读次数:


VIP会员专享下载:(非VIP会员无权下载!如果想下载,但还不是VIP会员,请点此订购
下载方式:使用鼠标右键(注意是鼠标右键!)点击下面的MP3音频/MP4视频链接,然后选择“另存为…”。
PDF节目文稿 PDF节目文稿  MP3节目录音 MP3节目录音 
文章正文
同步字幕

This is the VOA Special English SCIENCE REPORT.

Scientists report they have created the smallest device to carry electrical current ever made. The device is called a transistor. It is about one-million times smaller than a grain of sand.

Transistors are used in many electronic devices to control the flow of electrical current. True transistors can turn the flow of electricity on and off. They also have the ability to increase electrical current.

Extremely small transistors are used in computers. They form part of what is called an integrated circuit. Powerful integrated circuits have large numbers of transistors. Scientists have developed smaller transistors year after year to produce more powerful integrated circuits.

However, the new transistor may represent the smallest possible size for this kind of device. The area that carries electrical current in the new transistor is about the width of a single molecule.

Lucent Technologies' Bell Labs in Murray Hill, New Jersey, is developing the extremely small transistor. In Nineteen-Forty-Seven, scientists at the same laboratory invented the first transistor. William Shockley, John Bardeen and Walter Brattain received the Nobel Prize for Physics in Nineteen-Fifty-Six for their discovery.

Scientists Hendrik Schon, Zhenan Bao and Hong Meng created the new transistor. It is so small that it is put together chemically. The scientists used a chemical process to attach carbon-based molecules to gold. The process creates molecule-sized openings that carry electricity.

The molecules also chemically form a molecule-sized device that controls electrical current. Releasing and stopping electrical current permits electronic processors to move and store information. This simple ability to start and stop electrical current forms the language used by most computers.

The new transistor is still being developed. However, researchers at Bell Labs have already connected together several of the transistors into a circuit. They also say the chemical process for creating the transistors appears to work well.

Yet, the new extremely small transistors may be too small. One scientist at Hewlett-Packard Laboratories worries that connecting so many molecule-sized devices together would prove to be almost impossible.

This VOA Special English SCIENCE REPORT was written by Mario Ritter.

网友的学习评论(0条):
版权所有©2003-2019 南京通享科技有限公司,保留所有权利。未经书面许可,严禁转载本站内容,违者追究法律责任。 互联网经营ICP证:苏B2-20120186
网站备案:苏ICP备05000269号-1中国工业和信息化部网站备案查询
广播台