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首页> 外文期刊>Chemical Society Reviews >Incorporating single molecules into electrical circuits. The role of the chemical anchoring group
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Incorporating single molecules into electrical circuits. The role of the chemical anchoring group

机译：将单个分子结合到电路中。化学锚定基团的作用

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Constructing electronic circuits containing singly wired molecules is at the frontier of electrical device miniaturisation. When a molecule is wired between a pair of electrodes, the two points of contact are determined by the chemical anchoring groups, located at the ends of the molecule. At this point, when a bias is applied, electrons are channelled from a metallic environment through an extremely narrow constriction, essentially a single atom, into the molecule. The fact that this is such an abrupt change in the electron pathway makes the nature of the chemical anchoring groups critically important regarding the propagation of electrons from the electrode across the molecule. A delicate interplay of phenomena can occur when a molecule binds to the electrodes, which can produce profound differences in conductance properties depending on the anchoring group. This makes answering the question "what is the best anchoring group for single molecule studies" far from straight forward. In this review, we firstly take a look at techniques developed to 'wire-up' single molecules, as understanding their limitations is key when assessing a molecular wire's performance. We then analyse the various chemical anchoring groups, and discuss their merits and disadvantages. Finally we discuss some theoretical concepts of molecular junctions to understand how transport is affected by the nature of the chemical anchor group.
机译：构造包含单线分子的电子电路是电气设备小型化的前沿。当分子连接在一对电极之间时，两个接触点由位于分子末端的化学锚定基团确定。在这一点上，当施加偏压时，电子从金属环境通过极窄的收缩（基本上是单个原子）被引导到分子中。电子路径中的这种突然变化这一事实使得化学锚定基团的性质对于电子从电极穿过分子的传播至关重要。当分子与电极结合时，会发生现象之间的微妙相互作用，这取决于锚定基团，会在电导特性上产生深远的差异。这使得回答“什么是单分子研究的最佳锚定基团”这个问题远非直截了当。在这篇综述中，我们首先看一看为“连接”单个分子而开发的技术，因为了解它们的局限性是评估分子导线性能的关键。然后，我们分析各种化学锚定基团，并讨论它们的优缺点。最后，我们讨论分子连接的一些理论概念，以了解化学锚定基团的性质如何影响运输。

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