基于石墨的纳机电系统的外驱动可控振动

Controlled driven oscillations of graphite-based NEMS

摘要:

采用数值计算方法研究了基于石墨的纳机电系统在周期性简谐驱动力作用下实现稳定振动的条件. 确定了获得持久稳定的振动的系统和控制力参数. 计算和分析了两块石墨片等长及不等长时纳米振子的操作特性. 结果表明，通过选择合适的驱动振幅和频率，能够实现石墨片的持久稳定振动. 该方法对于进一步研究纳机电系统的设计有重要的参考价值.

Abstract:

The conditions controlling the stable oscillation of graphite-based nanoelectromechanical systems (NEMS) are investigated under periodical harmonic driving force with numerical computational methods. The parameters of the system and control force which allow obtaining the sustained stable oscillation at a constant frequency are determined. The operating characteristics of the nano-oscillator are calculated and analyzed for the qual-length and unequal-length graphite sheets. Calculational results show that sustained stable oscillation of the graphite sheets can be realized by properly choosing the amplitude and the initial phase of the periodical harmonic driving force. The methods reported here are believed to have important implications in NEMS design.