Driving a Macroscopic Oscillator with the Stochastic Motion of a Hydrogen Molecule
Driving a Macroscopic Oscillator with the Stochastic Motion of a Hydrogen Molecule
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DOI：
10.1126/science.1227621
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发表时间：
2012-11-09
期刊：
影响因子：
56.9
通讯作者：
Ignacio Pascual, Jose
中科院分区：
文献类型：
--
作者：
Lotze, Christian;Corso, Martina;Ignacio Pascual, Jose
从噪声中收集能量是随机共振理论提出的一个范例。我们证明氢（H-2）分子的随机切换可以驱动宏观机械谐振器的振荡。 H-2 运动是由隧道电子激活的，并引起非接触式原子力显微镜尖端感应到的力的波动。随机分子噪声和尖端的周期性振荡以协调的动态耦合，驱动系统进行自振荡。这种现象可能是增强能量从不相干源转移到分子发动机的相干动力学的一种方法。
Energy harvesting from noise is a paradigm proposed by the theory of stochastic resonances. We demonstrate that the random switching of a hydrogen (H-2) molecule can drive the oscillation of a macroscopic mechanical resonator. The H-2 motion was activated by tunneling electrons and caused fluctuations of the forces sensed by the tip of a noncontact atomic force microscope. The stochastic molecular noise and the periodic oscillation of the tip were coupled in a concerted dynamic that drives the system into self-oscillation. This phenomenon could be a way for enhancing the transfer of energy from incoherent sources into coherent dynamics of a molecular engine.