Inducing and viewing the rotational motion of a single molecule

被引:345
作者
Stipe, BC
Rezaei, MA
Ho, W [1 ]
机构
[1] Cornell Univ, Atom & Solid State Phys Lab, Ithaca, NY 14853 USA
[2] Cornell Univ, Ctr Mat Sci, Ithaca, NY 14853 USA
关键词
D O I
10.1126/science.279.5358.1907
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Tunneling electrons from the tip of a scanning tunneling microscope were used to induce and monitor the reversible rotation of single molecules of molecular oxygen among three equivalent orientations on the platinum(111) surface. Detailed studies of the rotation rates indicate a crossover from a single-electron process to a multielectron process below a threshold tunneling voltage. Values for the energy barrier to rotation and the vibrational relaxation rate of the molecule were obtained by comparing the experimental data with a theoretical model. The ability to induce the controlled motion of single molecules enhances our understanding of basic chemical processes on surfaces and may lead to useful single-molecule devices.
引用
收藏
页码:1907 / 1909
页数:3
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