|
- 积分
- 2555
- 威望
- 2555
- 包包
- 600
|
本帖最后由 细胞海洋 于 2011-11-10 14:07 编辑
+ `4 L+ J4 H* p$ k- R, y3 z& ~, n: U/ ]7 i# t2 x* F
Any future artificial transporters and robots operating at the nanoscale are likely to require molecules capable of directional translational movement over a surface. Even the design of such molecules is a daunting task, however, as they need to be able to use light, chemical or electrical energy to modulate their interaction with the surface in a way that generates directional motion. Kudernac et al. now unveil just such a molecule, made by attaching four rotary motor units to a central axis. Inelastic electron tunnelling induces conformational changes in the rotors and propels the molecule across a copper surface. By changing the direction of the rotary motion of individual motor units, the self-propelling molecular 'four-wheeler' structure can follow random or preferentially linear trajectories. This design provides a starting point for the exploration of more sophisticated molecular mechanical systems, perhaps with complete control over their direction of motion.3 s! e* e9 g, Z- u: o
0 Z4 k* y" c0 ]' t, u# i
: b. j0 r. z* z# D9 U[hide][/hide] |
附件: 你需要登录才可以下载或查看附件。没有帐号？注册
-
总评分: 威望 + 21
包包 + 22
查看全部评分
|
发表于 2011-11-10 13:27
