Dissipation from Interlayer Friction in Graphene Nanoelectromechanical Resonators
Dissipation from Interlayer Friction in Graphene Nanoelectromechanical Resonators
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DOI：
10.1021/acs.nanolett.1c02369
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发表时间：
2021-09-24
期刊：
影响因子：
10.8
通讯作者：
van der Zande, Arend M.
中科院分区：
文献类型：
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作者：
Ferrari, Paolo F.;Kim, SunPhil;van der Zande, Arend M.
二维(2D)材料的一个独特特征是其范德华界面处的摩擦力超低。在新一代二维异质结构纳米机电系统(NEMS)中，一个关键问题是低摩擦界面对系统动态性能的影响。在这里，我们应用石墨烯纳米机电鼓头谐振器的精致灵敏度来比较单层、Bernal堆叠双层和扭曲双层石墨烯薄膜的耗散。我们发现三种类型的谐振器的平均品质因数有显著差异：单层膜53个，扭转膜40个，贝纳尔叠层膜31个。我们将这种差异建模为刚性变化和运动过程中层间摩擦产生的附加耗散的组合。我们发现，即使在滑动的2D界面上测量到的最低摩擦力也足以改变2D NEMS中的耗散。该模型提供了一种基于考虑层间滑移和摩擦的二维异质结来量化NEMS中耗散的通用方法。
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, Bernalstacked 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.