Short pyridine-furan springs exhibit bistable dynamics of Duffing oscillators

TL;DR

This paper demonstrates that short pyridine-furan molecular springs exhibit bistable Duffing oscillator dynamics, including spontaneous vibrations and stochastic resonance, as shown through molecular dynamics simulations.

Contribution

It introduces molecular dynamics simulations of pyridine-furan springs exhibiting Duffing bistable dynamics, expanding understanding of nanoscale bistable systems.

Findings

Demonstrated bistable Duffing oscillator behavior in pyridine-furan springs

Observed thermally-activated spontaneous vibrations

Identified stochastic resonance phenomena in the system

Abstract

The intensive development of nanodevices acting as two-state systems has motivated the search for nanoscale molecular structures whose dynamics are similar to those of bistable mechanical systems, such as Euler arches and Duffing oscillators. Of particular interest are the molecular structures capable of spontaneous vibrations and stochastic resonance. Recently, oligomeric molecules that were a few nanometers in size and exhibited the bistable dynamics of an Euler arch were identified through molecular dynamics simulations of short fragments of thermo-responsive polymers subject to force loading. In this article, we present molecular dynamics simulations of short pyridine-furan springs a few nanometers in size and demonstrated the bistable dynamics of a Duffing oscillator with thermally-activated spontaneous vibrations and stochastic resonance.