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用自适应自由路径的倾斜表面的大视野图形重建

Jizhe Cui^1,2,3, Yi Zheng^1,2,3, Kang Sun^1,2,3

¹School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.

|August 22, 2025

概括

适应性自由路径图像学 (AFP) 在倾斜样本中克服图像退化. 这种新方法增强了材料微观结构的分析,并扩大了平面样本的图解断层扫描的使用范围.

科学领域:

材料科学
电子显微镜
图像技术

背景情况:

固体的原子分辨率成像通常需要倾斜样本表面.
样本倾斜导致真空中的电子束路径变化,降低图像质量,特别是在大视野的图像学中.
现有的方法在重建过程中难以纠正这些自由路径变化.

研究的目的:

开发一种新型的电子图形方法,以纠正由样本倾斜引起的电子束路径变化.
提高图像质量,并使材料微观结构的准确分析,即使是倾斜的样本.
扩大对平面材料的图形断层扫描的应用.

主要方法:

引入自适应性自由路径图谱 (AFP).
在ptychographic重建期间将电子束的自由路径与4D数据脱.
实施AFP用于分析二维材料和纳米材料.

主要成果:

AFP有效地减轻了样本倾斜造成的图像质量下降.
该方法允许精确确定纳米材料的二维材料和表面形态.
从倾斜的样本中成功获取高质量的大视野图像.

结论:

适应性自由路径图像学 (AFP) 是一种可靠的解决方案,用于以原子分辨率对倾斜样品进行成像.
通过详细的表面和结构分析,AFP显著提高了对材料微观结构的理解.
预计AFP将在平面材料的表征中推动图解断层扫描的更广泛采用.

关键词:

适应性自由路径图形学高质量的成像大视野成像图形摄影表面形态

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