| 利用杠杆原理制备用于扫描隧道显微镜的钨针尖 |
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| 引用本文： | 汪洋,巩金龙,朱德彰,王化斌.利用杠杆原理制备用于扫描隧道显微镜的钨针尖[J].核技术,2007,30(3):200-203. |
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| 作者姓名： | 汪洋 巩金龙 朱德彰 王化斌 |
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| 作者单位： | 中国科学院上海应用物理研究所,上海,201800;中国科学院研究生院,北京,100049;中国科学院上海应用物理研究所,上海,201800 |
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| 基金项目： | 国家自然科学基金
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国家重点基础研究发展计划(973计划) |
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| 摘 要： | 利用杠杆平衡原理,设计了一套扫描隧道显微镜(STM)钨针尖的制备装置.它可以使针尖瞬间脱离液面,避免针尖继续腐蚀而影响针尖质量.同时它以简单的力学结构替代了传统复杂的控制电路.扫描电子显微镜使用结果表明,利用此法制备的钨针尖最小半径为50 nm.利用所制备的针尖对高序石墨进行STM扫描,效果良好,可用于原子级图像的扫描.
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| 关 键 词： | 扫描隧道显微镜 针尖 电化学腐蚀 杠杆原理 |
| 修稿时间： | 2006-09-122007-01-15 |
Fabrication of tungsten tip for scanning tunneling microscope by the lever principle |
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| WANG Yang,GONG Jinlong,ZHU Dezhang,WANG Huabin.Fabrication of tungsten tip for scanning tunneling microscope by the lever principle[J].Nuclear Techniques,2007,30(3):200-203. |
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| Authors: | WANG Yang GONG Jinlong ZHU Dezhang WANG Huabin |
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| Affiliation: | 1.Shanghai Institute of Applied Physics, the Chinese Academy of Sciences, Shanghai 201800, China 2 . Graduate School of the Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | A novel experimental setup was designed to fabricate tungsten tips for scanning tunneling microscope(STM),based on simple mechanical lever principle.The equipment can quickly separate the tip from electrolyte to avoid the further etching of the fine-shaped tungsten tip.The setup is advantageous for its simplicity over complex electronic control systems.The use result in scanning electron microscope demonstrates that the radius of the tip can reach 50 nm.The tip was applied to scan the surface of highly-oriented pyrolytic graphite,and the results were satisfactory.It is shown that the tip can be used for the scanning of atomically resolved images. |
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| Keywords: | Scanning tunnel microscope Tip Electrochemical etching Lever principle |
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