Journal
NANOSCALE
Volume 6, Issue 5, Pages 2793-2799Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr05814j
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Funding
- AUTOMOL project [ANR 09-NANO-040]
- CNRS
- Generalitat de Catalunya
- European Union
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The shot noise of a tunneling current passing through a molecule-motor can sustain a one-way rotation when populating the molecular excited states by tunneling inelastic excitations. We demonstrate that a ratchet-like ground state rotation potential energy curve is not necessary for the rotation to occur. A relative shift in energy difference between the maxima of this ground state and the minima of the excited states is the necessary condition to get to a unidirectional rotation. The rotor speed of rotation and its rotation direction are both controlled by this shift, indicating the necessity of a careful design of both the ground and excited states of the next generation of molecule-motors to be able to generate a motive power at the nanoscale.
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