Ultrafast nano-oscillators based on interlayer-bridged carbon nanoscrolls
1 Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA
2 Maryland NanoCenter, University of Maryland, College Park, MD 20742, USA
Nanoscale Research Letters 2011, 6:470 doi:10.1186/1556-276X-6-470Published: 25 July 2011
We demonstrate a viable approach to fabricating ultrafast axial nano-oscillators based on carbon nanoscrolls (CNSs) using molecular dynamics simulations. Initiated by a single-walled carbon nanotube (CNT), a monolayer graphene can continuously scroll into a CNS with the CNT housed inside. The CNT inside the CNS can oscillate along axial direction at a natural frequency of tens of gigahertz. We demonstrate an effective strategy to reduce the dissipation of the CNS-based nano-oscillator by covalently bridging the carbon layers in the CNS. We further demonstrate that such a CNS-based nano-oscillator can be excited and driven by an external AC electric field, and oscillate at more than 100 GHz. The CNS-based nano-oscillators not only offer a feasible pathway toward ultrafast nano-devices but also hold promise to enable nanoscale energy transduction, harnessing, and storage (e.g., from electric to mechanical).