Molecular transport through single molecules between eplitaxially grown contacts

在表面科学小组与有机化学小组的合作下，该实验项目将纳米尺寸接触的生成与二茂铁基有机分子和相关钴系统的合成相结合，将单分子实施为接触几何形状及其通过电传输测量，隧道显微镜和光谱学的物理表征。纳米尺寸的接触将实现使用电子束光刻，自组织和电迁移的组合，使用外延，晶体和极薄的金属结构的银和铅的低掺杂硅。这将实现接触的几何形状，允许这些接触的原子水平上的表征和直接相关的几何结构和电子状态的吸附分子与它们的电输运性质。对分子输运性质的系统研究包括金属接触材料的变化、金属接触材料上附着的分子以及形成金属-分子键的分子基团。这种贡献包括引入Ag和Pb作为金属结构和基于二茂铁的分子以及衍生自（环丁二烯）-cyclohexenylcobald的夹心络合物通过各种端基连接到金属。

In collaboration of a group from surface science with a group from organic chemistry, this experimental project combines the generation of nano-size contacts with the synthesis of ferrocene-based organic molecules and realted cobalt systems, the implementation of single molecules into the contact geometry and their physical characterization by electrical transport measurements, tunneling microscopy and spectroscopy. Nano-size contacts will be realized using a combination of e-beam lithography, self organization and electromigration, using epitaxial, crystalline and extremely thin metallic structures of Ag and Pb on low-doped Si. This will realize contact geometries that allow the characterization of these contacts on the atomic level and the direct correlation of geometric structures and electronic states of the adsorbed molecules with the electric transport properties of them. Systematic studies of molecular transport properties include the variation of the metallic contact materials, the molecules attached of them, and the molecular groups forming the metal-molecule bond. This contribution consists of introducing Ag and Pb as metallic structures and ferrocene-based molecules as well as sandwich complexes derived from (cyclobutadiene)-cyclopentadienylcobald to be attaches to the metals by a variety of end groups.