Quantifying the local mechanical properties of twisted double bilayer graphene.
Quantifying the local mechanical properties of twisted double bilayer graphene.
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DOI：
10.1039/d3nr00388d
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发表时间：
2023-03
期刊：
影响因子：
6.7
通讯作者：
Alessandra Canetta;S. González-Muñoz;V. Nguyen;K. Agarwal;Pauline de Crombrugghe de Picquendaele-Pauline-de-Crombrugghe-de-Picquendaele-2213065463;Yuanzhuo Hong;S. Mohapatra;Kenji Watanabe;T. Taniguchi;B. Nysten;B. Hackens;R. Ribeiro-Palau;J. Charlier;O. Kolosov;J. Spièce;P. Gehring
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作者：
Alessandra Canetta;S. González-Muñoz;V. Nguyen;K. Agarwal;Pauline de Crombrugghe de Picquendaele-Pauline-de-Crombrugghe-de-Picquendaele-2213065463;Yuanzhuo Hong;S. Mohapatra;Kenji Watanabe;T. Taniguchi;B. Nysten;B. Hackens;R. Ribeiro-Palau;J. Charlier;O. Kolosov;J. Spièce;P. Gehring
最小扭曲的货车德瓦尔斯材料的纳米力学测量仍然难以捉摸，尽管他们的设备实现的根本重要性。在这里，我们使用超声力显微镜（UFM），以局部量化的平面外的杨氏模量的变化在最小扭曲双层石墨烯（TDBG）。我们发现，沿着单畴壁和双畴壁，杨氏模量分别软化了7%和17%。沿着单畴壁和双畴壁。我们的实验结果证实了力场松弛模型。这项研究突出了工程扭曲材料的纳米机械性能的强可调性，并为未来设计的2D纳米机械系统的应用铺平了道路。
Nanomechanical measurements of minimally twisted van der Waals materials remained elusive despite their fundamental importance for device realisation. Here, we use Ultrasonic Force Microscopy (UFM) to locally quantify the variation of out-of-plane Young's modulus in minimally twisted double bilayer graphene (TDBG). We reveal a softening of the Young's modulus by 7% and 17% along single and double domain walls, respectively. Our experimental results are confirmed by force-field relaxation models. This study highlights the strong tunability of nanomechanical properties in engineered twisted materials, and paves the way for future applications of designer 2D nanomechanical systems.