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扫描道显微镜对微米大小的石墨烯片进行定位和原子成像

Tao Geng¹, Jihao Wang¹, Wenjie Meng¹

¹Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China; The High Magnetic Field Laboratory of Anhui Province, Hefei, Anhui 230031, China.

Ultramicroscopy

|August 3, 2023

概括

这项研究引入了一种新的扫描道显微镜 (STM) 方法,用于精确定位和超小石墨烯样本的原子分辨率成像. 该技术能够对石墨烯结构进行详细的观察,推动纳米尺度研究.

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:

扫描道显微镜 (STM) 对于纳米级成像至关重要.
精确地将STM尖端放在小样本上仍然是一个挑战.
石墨烯的独特特性使其成为先进电子产品的关键材料.

研究的目的:

开发一种用于在微米大小的样本上直接定位尖端的新机制.
使用自制的STM.实现双层石墨烯的原子分辨率成像.
为了研究石墨烯上层结构和捕获超小石墨烯板.

主要方法:

使用尖端轨迹和尖端影子跟踪来定位.
采用拉曼光谱法来识别双层石墨烯.
在采用光学显微镜的自制STM中实现了改进的基于线路的成像模式.
执行快速,大面积的搜索行动.

主要成果:

实现了20μm × 50μm双层石墨烯板的原子分辨率成像,揭示了六角格子结构.
在石墨烯表面观察到一个独特的O环超结构.
成功捕获并成像了一个只有1.3纳米的石墨烯板,具有原子分辨率.
展示了开发的STM系统的定位能力和成像精度.

结论:

开发的STM机制能够准确定位和高分辨率成像超小的石墨烯样本.
这一进步有助于进一步对纳米材料进行STM研究.
能够对微小的石墨烯结构进行成像的能力为纳米技术研究开辟了新的途径.

关键词:

原子分辨率成像成像技术微米大小的双层石墨烯.定位定位定位定位定位定位扫描道显微镜的扫描方法

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