|
- 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
A, V/ w$ k4 K8 g3 S
( P$ a. s, A& u# x0 Z! R$ P 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.
. }0 M) o& m1 z% p7 I8 F# G# o4 j+ G
, Y5 x( x. n: ^2 E; H1 S h9 `[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
