Properties of large organic molecules on metal surfaces
Properties of large organic molecules on metal surfaces
复制标题
DOI：
10.1016/s0079-6816(03)00004-2
复制
发表时间：
2003-06-01
影响因子：
6.4
通讯作者：
Besenbacher, F
中科院分区：
文献类型：
--
作者：
Rosei, F;Schunack, M;Besenbacher, F
大有机分子在表面上的吸附最近已经成为深入研究的主题，这既是因为分子的内在物理和化学性质，也是因为在新兴的纳米技术领域中的潜在应用。某些复杂的分子被认为是分子电子学和纳米机械器件的基本构建块的良好候选者。一般来说，表面上的分子有序性由分子间力和分子-基底相互作用之间的微妙平衡控制。在某些条件下，这些相互作用可以在一定程度上控制，有时甚至通过适当选择衬底材料和对称性来调节。一些研究表明，在分子吸附时，表面并不总是表现为静态模板，而是可以显著地重排以容纳不同的分子种类。在这种情况下，它已被证明，扫描隧道显微镜（STM）是一个非常强大的工具，探索原子尺度的领域的表面，并为调查吸附物表面相互作用。近年来，利用高分辨率、快速扫描的STM技术，人们对大分子与表面相互作用的一些基本过程，如分子扩散、吸附物在表面的键合、分子自组装等，获得了前所未有的新认识。除了正常的成像模式，STM针尖还可以用于以自下而上的方式操纵单个原子和分子，集体或一次一个。通过这种方式，可以直接揭示分子诱导的表面重构过程，并且可以以原子精度设计纳米结构，以研究基本感兴趣的表面量子现象。在这里，我们将提出一个简短的回顾，最近的一些结果，其中几个是由我们的小组，其中大有机分子和金属表面之间的复杂相互作用的几个功能被揭示。重点是使用STM和其他互补的表面敏感技术进行的实验。(C)2003爱思唯尔科技有限公司版权所有。
The adsorption of large organic molecules on surfaces has recently been the subject of intensive investigation, both because of the molecules' intrinsic physical and chemical properties, and for prospective applications in the emerging field of nanotechnology. Certain complex molecules are considered good candidates as basic building blocks for molecular electronics and nanomechanical devices. In general, molecular ordering on a surface is controlled by a delicate balance between intermolecular forces and molecule-substrate interactions. Under certain conditions, these interactions can be controlled to some extent, and sometimes even tuned by the appropriate choice of substrate material and symmetry. Several studies have indicated that, upon molecular adsorption, surfaces do not always behave as static templates, but may rearrange dramatically to accommodate different molecular species. In this context, it has been demonstrated that the scanning tunnelling microscope (STM) is a very powerful tool for exploring the atomic-scale realm of surfaces, and for investigating adsorbate-surface interactions. By means of high-resolution, fast-scanning STM unprecedented new insight was recently achieved into a number of fundamental processes related to the interaction of largish molecules with surfaces such as molecular diffusion, bonding of adsorbates on surfaces, and molecular self-assembly. In addition to the normal imaging mode, the STM tip can also be employed to manipulate single atoms and molecules in a bottom-up fashion, collectively or one at a time. In this way, molecule-induced surface restructuring processes can be revealed directly and nanostructures can be engineered with atomic precision to study surface quantum phenomena of fundamental interest. Here we will present a short review of some recent results, several of which were obtained by our group, in which several features of the complex interaction between large organic molecules and metal surfaces were revealed. The focus is on experiments performed using STM and other complementary surface-sensitive techniques. (C) 2003 Elsevier Science Ltd. All rights reserved.