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A carbon nanofibre scanning probe assembled using an electrothermal microgripper

机译:使用电热微夹钳组装的碳纳米纤维扫描探针

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摘要

Functional devices can be directly assembled using microgrippers with an in situ electron microscope. Two simple and compact silicon microgripper designs are investigated here. These are operated by electrothermal actuation, and are used to transfer a catalytically grown multi-walled carbon nanofibre from a fixed position on a substrate to the tip of an atomic force microscope cantilever, inside a scanning electron microscope. Scanning of high aspect ratio trenches using the nanofibre supertip shows a significantly better performance than that with standard pyramidal silicon tips. Based on manipulation experiments as well as a simple analysis, we show that shear pulling (lateral movement of the gripper) is far more effective than tensile pulling (vertical movement of gripper) for the mechanical removal of carbon nanotubes from a substrate.
机译:可以使用带有原位电子显微镜的微型夹具直接组装功能设备。本文研究了两种简单而紧凑的硅微夹钳设计。这些通过电热致动来操作,并且用于将催化生长的多壁碳纳米纤维从基板上的固定位置转移到扫描电子显微镜内部的原子力显微镜悬臂的尖端。使用纳米纤维超尖端对高深宽比沟槽的扫描显示出明显优于标准金字塔形硅尖端的性能。基于操作实验以及简单的分析,我们显示出从机械上去除碳纳米管的剪切力(夹具的横向移动)远比拉伸力(夹具的垂直移动)更有效。

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