短吡啶-呋喃弹簧展现出 Duffing 振子的双稳态动力学
Short pyridine-furan springs exhibit bistable dynamics of Duffing oscillators
AI总结：
本文通过分子动力学模拟证明纳米尺度的短吡啶-呋喃弹簧具有 Duffing 振子的双稳态动力学，并展现出热激活自发振动和随机共振，为双态纳米器件设计提供了新分子结构。
摘要：
作为双态系统运行的纳米器件的深入发展，推动了对纳米尺度分子结构的探索，这些结构的动力学行为类似于双稳态机械系统，例如欧拉拱和 Duffing 振子。特别令人感兴趣的是能够产生自发振动和随机共振的分子结构。近期，通过对受外力加载的热响应聚合物短片段进行分子动力学模拟，研究人员发现了几种尺寸为几纳米、展现出欧拉拱双稳态动力学的低聚物分子。在本文中，我们展示了对尺寸为几纳米的短吡啶-呋喃弹簧进行的分子动力学模拟，并证明了其具有 Duffing 振子的双稳态动力学，包括热激活的自发振动和随机共振。
英文摘要：
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.
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