Mechanical Oscillation of Kinked Silicon Nanowires: a Natural Nanoscale Spring

TL;DR

This study uses molecular dynamics simulations to demonstrate kinked silicon nanowires functioning as nanoscale springs with gigahertz oscillation frequencies, revealing their elastic properties and potential in nanomechanical devices.

Contribution

It introduces the concept of using kinked silicon nanowires as nanoscale springs and analyzes their oscillation behavior through molecular dynamics simulations.

Findings

Kinked silicon nanowires can oscillate like nanoscale springs.

Oscillation frequencies reach gigahertz range.

A dimensional crossover in transverse modes is observed.

Abstract

We perform classical molecular dynamics simulations to demonstrate the application of kinked silicon nanowires (KSiNWs) as nanoscale springs. The spring-like oscillation in gigahertz frequency range is successfully actuated using a similar procedure as the actuation of a classical mass spring oscillator. We detect the spring-like mechanical oscillation and some other low-frequency oscillations by the energy spectrum analysis, where a dimensional crossover phenomenon is observed for the transverse mode in KSiNWs with decreasing aspect ratio. Our findings shed light on the elastic properties of the KSiNW and open a way for its application in nanomechanical devices.