Towards powering nanometer-scale devices with molecular motors: Single molecule engines

摘要

Future nanodevices such as levers, valves, pumps, and other functional parts will require molecular motors to generate mechanical work. Electrochemically switchable single polymer chains are possible candidates for such motors. The proof of principle that such a single macromolecular motor can work has been achieved using poly (ferrocenyldimethylsilane) (PFS). PFS can reversibly be oxidized and reduced by an external potential. This leads to changes in its mechanical properties, which can be used to drive a cyclic molecular engine. Such a system is compatible with a high density array of individually addressable molecular motors, e.g. by interfacing with electrodes smaller than the diffraction limit of light.