碳纳米管原子力显微镜针尖的研究

本文研究了制作碳纳米管原子力显微镜针尖的方法和过程。在光学显微镜下，通过两个微工作台操纵将纯化后的多壁碳纳米管粘结在传统的原子力显微镜的Si针尖上。运用电蚀的方法优化碳管针尖的长度使其达到高分辨率的要求。我们运用制作的碳纳米管针尖在敲击模式下时G型免疫球蛋白进行扫描成像，结果显示了其典型的Y形结构，这是传统AFM的Si针尖无法获得的。

Carbon nanotube tip for atomic force microscopy

In this paper we present a controlled method and process to make carbon nanotube tips for atomic force microscopy (AFM). Purified multiwalled carbon nanotube is transferred onto a conventional Si tip under viewing in optical microscope equipped with two independent translation stages. The length of a nanotube tip can be decreased by electrical etching on a conductive surface to reduce the amplitude of vibration to a level for high resolution imaging. The nanotube tips were used to image immunoglobulin G on mica with tapping mode atomic force microscopy in air. The result exhibits the characteristic Y-shaped structure that was previously unobservable with conventional AFM catilever tips.