微型制造的双倾斜装置用于传输电子显微镜成像原子力显微镜探头
Takaaki Sato1, Vivek Anand Menon1, Hiroshi Toshiyoshi1
1Institute of Industrial Science, University of Tokyo, Tokyo, Japan.
The Review of scientific instruments
|February 28, 2024
概括
研究人员开发了一种新方法,使用传输电子显微镜 (TEM) 精确地描述原子力显微镜 (AFM) 探针尖端. 这种技术揭示了尖端几何学的显著变化,影响了AFM测量分辨率和应用开发.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 表面科学是一门学科.
背景情况:
- 原子力显微镜 (AFM) 的分辨率受到探头几何学的限制.
- 目前用于描述AFM探针尖端的方法是间接的或与先进的传输电子显微镜 (TEM) 系统不兼容的.
- 精确的AFM探头表征对于推进纳米尺度测量和应用至关重要.
研究的目的:
- 开发一种用于高分辨率TEM观测AFM探头尖端的新型装置.
- 为了使AFM探头几何学的原子尺度表征,包括晶体学晶格边缘和尖端配置文件.
- 评估名义上相同的AFM探测器之间的几何变异性.
主要方法:
- 设计和制造了一个与TEM倾斜阶段兼容的薄样本持有器.
- 利用传输电子显微镜 (TEM) 以原子分辨率对AFM探针尖端进行成像.
- 在TEM中使用样品倾斜,以获得探头尖端的详细晶体和配置信息.
主要成果:
- 通过使用TEM与样本倾斜成功证明了AFM探针晶体结构的原子尺度表征.
- 观察到同一个批次的探针曲率半径的显著变化,范围从1.4nm到50nm.
- 验证了新设备克服以前样本持有器的局限性的能力.
结论:
- 开发的TEM装置使得AFM探头尖端能够精确地在原子尺度上进行表征.
- 即使在名义上相同的AFM探测器批量内,也存在显著的几何变化.
- 精确的探测器表征对于理解和改善AFM测量可靠性和性能至关重要.
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