Moving nanostructures: pulse-induced positioning of supramolecular assemblies.
Moving nanostructures: pulse-induced positioning of supramolecular assemblies.
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DOI：
10.1021/nn303708h
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发表时间：
2013-01
期刊：
影响因子：
17.1
通讯作者：
Anja Nickel;R. Ohmann;Joerg Meyer;M. Grisolía;C. Joachim;F. Moresco;G. Cuniberti
中科院分区：
文献类型：
--
作者：
Anja Nickel;R. Ohmann;Joerg Meyer;M. Grisolía;C. Joachim;F. Moresco;G. Cuniberti
对于纳米器件的发展，通过扫描隧道显微镜操纵单个原子和分子是一种成熟的实验技术。然而，为了构建更大和更高阶的结构，重要的是不仅要移动一个吸附质，而且要同时移动几个吸附质。此外，标准操作实验中的一个主要问题是尖端顶点和吸附物的强烈机械相互作用，这可能会损坏所研究的系统。在这里，我们提出了一个纯粹的电子激发方法的几个分子的弱相互作用组件的受控运动。通过施加电压脉冲，这种超分子纳米结构以受控的方式移动，而不会失去其集体完整性。根据所施加电压的极性和位置，可以在预定义的方向上驱动移动。我们温和的纯电子方法控制操纵纳米结构开辟了新的方式来构建分子器件。
For the development of nanoscale devices, the manipulation of single atoms and molecules by scanning tunneling microscopy is a well-established experimental technique. However, for the construction of larger and higher order structures, it is important to move not only one adsorbate but also several at the same time. Additionally, a major issue in standard manipulation experiments is the strong mechanical interaction of the tip apex and the adsorbate, which can damage the system under investigation. Here, we present a purely electronic excitation method for the controlled movement of a weakly interacting assembly of a few molecules. By applying voltage pulses, this supramolecular nanostructure is moved in a controlled manner without losing its collective integrity. Depending on the polarity and location of the applied voltage, the movement can be driven in predefined directions. Our gentle purely electronic approach for the controlled manipulation of nanostructures opens new ways to construct molecular devices.