Single-molecule torsional pendulum

被引：128

作者：

Meyer, JC ^{[1
]}

Paillet, M

Roth, S

机构：

[1] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

[2] Univ Montpellier 2, Lab Colloides Verres & Nanomat, F-34095 Montpellier, France

来源：

SCIENCE | 2005年 / 309卷 / 5740期

关键词：

D O I：

10.1126/science.1115067

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：

We have built a torsional pendulum based on an individual single-waited carbon nanotube, which is used as a torsional spring and mechanical support for the moving part. The moving part can be rotated by an electric field, resulting in large but fully elastic torsional deformations of the nanotube. As a result of the extremely small restoring force associated with the torsional deformation of a single molecule, unusually large oscillations are excited by the thermal energy of the pendulum. By diffraction analysis, we are able to determine the handedness of the molecule in our device. Mechanical devices with molecular-scale components are potential building blocks for nanoelectromechanical systems and may also serve as sensors or actuators.

引用

页码：1539 / 1541

页数：3

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