A three-stage rotary transmission nanobearing driven by a gigahertz nanomotor

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Abstract
In a transmission system, the rotational speed of the output can be adjusted by the system. In this study, we introduce a three-stage rotational transmission nanosystem model that uses carbon nanotubes with excellent mechanical properties to fabricate coaxially distributed nanomotors with three nanobearings. Driven by a gigahertz nanomotor at 300 K, the nanobearings are changed to adjust the output rotational frequency. In view of the differences in chirality and radius of the carbon nanotubes, 17 transmission models are established and tested by molecular dynamics simulation. The rotor’s rotational transmission ratio curves show the dynamic response of the transmission system. A better down-converting transmission system can be obtained when the radius of the rotating component is between 0.58nm and 0.88nm or the difference in radii between the rotating components is greater than 0.2 nm. From the results obtained by molecular dynamics simulation, some key points are demonstrated for future deceleration of the rotary nanomotor.
Funding Information
  • National Natural Science Foundation of China (11604203)

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