| 查看: 260 | 回复: 1 | |||
| 当前主题已经存档。 | |||
[资源]
美：定义纳米科技研究（看一下，了解了解吧）
|
|||
|
The U.S. National Nanotechnology Initiative uses the term "nanotechnology" to describe: * Research and technology development aimed to work at atomic and molecular scales, in the length scale of approximately 1 - 100 nanometer range; * The ability to understand, create and use structures, devices and systems that have fundamentally new properties and functions because of their nanoscale structure; * The ability to control – to see, measure and manipulate – matter on the atomic scale to exploit those properties and functions. "Nanotechnology stands out as a likely launch pad to a new technological era because it focuses on perhaps the final engineering scales people have yet to master," says a 1999 report: Nanotechnology: Shaping the World Atom by Atom, by the National Science and Technology Council. The ability to build structures molecule by molecule would allow scientists to create new structural materials 50 times stronger than steel of the same weight, making possible the construction of a Cadillac weighing 100 pounds, according to Ralph Merkle of the Xerox Palo Alto Research Center. It could also, he says in an article in MIT's Technology Review, "give us surgical instruments of such precision and deftness that they could operate on the cells and even molecules from which we are made." Some of the methods necessary to build structures consisting of large numbers of precisely arranged atoms include molecular self-assembly, in which molecular building blocks assemble themselves in pre-designed ways. Using this technique, researchers have created carbon nanotubes with diameters of about one ten-thousandth of a human hair that can be used as miniature structural materials, electronic components and drug-delivery systems. Scientists also depend on such tools as Scanning Tunneling Microscopes and Scanning Probe Microscopes to build images on surfaces, manipulate atoms into miniature structures, or analyze the identities of atoms and molecules one atom at a time. |
回复此楼» 猜你喜欢
湖北师范大学复试调剂
已经有0人回复
-
武汉纺织大学_化工学院官方调剂群-院士团队招生-学生自由度高-每届发展好
已经有0人回复
-
金属材料论文润色/翻译怎么收费?
已经有136人回复
-
济南大学国家优青课题组 2026 调剂招生来啦
已经有0人回复
-
武汉纺织大学_化学院官方调剂群-院士团队招生-学生自由度高发展好-欢迎各位同学
已经有0人回复
-
河北大学 材料与化工 硕士招收调剂
已经有0人回复
-
西华大学 化学 调剂有名额
已经有0人回复
-
上海应用技术大学招生调剂研究生
已经有4人回复
» 本主题相关商家推荐: (我也要在这里推广)
2楼2007-05-10 13:23:21
