范德瓦尔斯摩尔和原子格子的扭力显微镜
Mihir Pendharkar1,2, Steven J Tran1,3, Gregory Zaborski1,2
1Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025.
概括
扭力显微镜 (TFM) 精确地测量了范德瓦尔斯异构结构中的扭转角度. 这种扫描探测技术揭示了莫雷图案和原子格子,有助于可预测的制造.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术 纳米技术
背景情况:
- 范德瓦尔斯 (vdW) 异构结构表现出受层间扭曲影响的可调节电子特性.
- 在VDW堆中精确控制和扭转角度的表征对于可预测的设备性能至关重要.
- 现有的扭转角度测定方法往往需要复杂的基础设施或广泛的样本准备.
研究的目的:
- 证明扭力显微镜 (TFM) 是一种用于表征VDW异构结构中扭转角度的简单方法.
- 揭示TFM在成像摩埃尔超级格子和各种长度尺度的原子格子中的能力.
- 确立TFM作为VDW异构结构制造中质量控制的有价值工具.
主要方法:
- 利用扭力力显微镜 (TFM),这是一个扫描探头技术,用于测量动态摩擦.
- 采用原子力显微镜 (AFM) 带有活跃的扭力共振驱动和力反.
- 将TFM应用于石墨烯/石墨烯和石墨烯/六角化 (hBN) 双层.
主要成果:
- TFM成功地在石墨烯和石墨烯/hBN的扭曲双层中成像了moiré超级网.
- 该技术解决了单个石墨烯和hBN层的原子格子.
- TFM在多个长度尺度上对表面和浅地地下结构表现出敏感性.
结论:
- TFM提供了一种多功能,室温,环境条件的方法来表征VDW异构结构.
- 这种技术可以精确地确定摩埃尔超级格子中的扭转角度和应变.
- 通过提供关键结构信息,TFM支持可预测的moiré异构结构的制造.
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