当前位置: X-MOL 学术Nano Lett. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Dissipation from Interlayer Friction in Graphene Nanoelectromechanical Resonators
Nano Letters ( IF 10.8 ) Pub Date : 2021-09-24 , DOI: 10.1021/acs.nanolett.1c02369
Paolo F Ferrari 1 , SunPhil Kim 1 , Arend M van der Zande 1, 2
Affiliation  

A unique feature of two-dimensional (2D) materials is the ultralow friction at their van der Waals interfaces. A key question in a new generation of 2D heterostructure-based nanoelectromechanical systems (NEMS) is how the low friction interfaces will affect the dynamic performance. Here, we apply the exquisite sensitivity of graphene nanoelectromechanical drumhead resonators to compare the dissipation from monolayer, Bernal-stacked bilayer, and twisted bilayer graphene membranes. We find a significant difference in the average quality factors of three resonator types: 53 for monolayer, 40 for twisted and 31 for Bernal-stacked membranes. We model this difference as a combination of change in stiffness and additional dissipation from interlayer friction during motion. We find even the lowest frictions measured on sliding 2D interfaces are sufficient to alter dissipation in 2D NEMS. This model provides a generalized approach to quantify dissipation in NEMS based on 2D heterostructures which incorporate interlayer slip and friction.

中文翻译:

石墨烯纳米机电谐振器中层间摩擦的耗散

二维 (2D) 材料的一个独特特征是其范德华界面处的超低摩擦。新一代基于二维异质结构的纳米机电系统 (NEMS) 的一个关键问题是低摩擦界面将如何影响动态性能。在这里,我们应用石墨烯纳米机电鼓面谐振器的精湛灵敏度来比较单层、伯纳尔堆叠双层和扭曲双层石墨烯膜的耗散。我们发现三种谐振器类型的平均品质因数存在显着差异:单层为 53,扭曲为 40,伯纳尔堆叠膜为 31。我们将这种差异建模为刚度变化和运动过程中层间摩擦额外​​耗散的组合。我们发现,即使在滑动 2D 界面上测得的最低摩擦力也足以改变 2D NEMS 中的耗散。该模型提供了一种通用的方法来量化 NEMS 中的耗散,该方法基于包含层间滑移和摩擦的二维异质结构。
更新日期:2021-10-13
down
wechat
bug