Chemical Derivatization of Scanning Probe Microscope Tips

John Baldeschweiler获得了探索性研究的小额资助。 从理论和计算化学程序和 MPS多学科活动办公室以化学方式开发 衍生化扫描隧道显微镜（STM）与原子力 显微镜（AFM）探针尖端。 本研究的目的是：1） 将高纵横比加合物附着到尖端;以及2）将特定的化学物质 部分。 目前，想要近原子分辨率的用户 基本上都是靠运气才能得到好的小费。 连接的能力 高长径比加合物将使获得近原子的 分辨率可靠且可再现。 能够将特定的 化学部分将导致化学对比的机制。 初步计算表明，原子力显微镜具有足够的灵敏度， 来检测比单个氢键弱的相互作用。 纳米技术的发展需要创造和 以原子精度分析结构。 但是为了使 纳米技术成为现实，图像和分析的能力 原子尺度的材料是必不可少的。STM和AFM已经 在材料科学、化学和生物学方面产生了惊人的成果。 对纳米操纵效果进行可靠成像的能力将取决于 开发可重复的高长径比尖端， 化学对比机制。

John Baldeschweiler is supported by a Small Grant for Exploratory Research from the Theoretical and Computational Chemistry Program and the MPS Office of Multidisciplinary Activities to develop chemically derivatized Scanning Tunneling Microscopy (STM) and Atomic Force Microscopy (AFM) probe tips. The goals of this research are to: 1) to attach high-aspect adducts to the tip; and 2) to attach specific chemical moieties. At the present time users who want near-atomic resolution depend essentially on luck to produce good tips. The ability to attach high-aspect adducts will make it possible to obtain near-atomic resolution reliably and reproducibly. The ability to attach specific chemical moieties would lead to a mechanism for chemical contrast. Preliminary calculations indicate that an AFM has sufficient sensitivity to detect an interaction weaker than a single hydrogen bond. The development of nanotechnology requires the ability to create and analyze structures with atomic precision. However, in order for nanotechnology to become a reality, the ability to image and analyze materials on the atomic scale is essential. STM and AFM have already generated striking results in material science, chemistry and biology. The ability to image the effects of nanomanipulation reliably will depend on the development of reproducibly high-aspect tips, and the development of chemical contrast mechanisms.