Single-molecule spectroscopy of conjugated molecules between nanoscale metallic structures

纳米级金属结构之间共轭分子的单分子光谱

• 批准号: 14761623
• 负责人: Dr. Frank Jäckel
• 金额: --
• 依托单位: Department of Chemistry
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2007-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/14761623?language=en
• 关键词: Single; molecule; spectroscopy; conjugated; molecules

The use of single conjugated molecules as active components in electronic devices is presently considered an alternative to semiconductor based nano-electronics since it directly provides well-defined nano-scale building blocks. However, a detailed understanding of the metal-molecule contacts and the electron transport mechanisms in such devices has not yet been achieved. Here, thiol-functionalized conjugated polymers shall be deposited between nanolithographically prepared gold bow-tie nanoantennas. These nanoantennas provide huge enhancements of incident electro-magnetic fields thereby allowing for single-molecule surface-enhanced Ramanspectroscopy studies which are expected, together with scattering and single-molecule fluorescence investigations, to give more insight into the nature of the molecule-metal contacts. The uncharted regime of simultaneous measurement of optical and electron transport properties of single molecules shall be attempted by applying electric fields to nanoantennas bridged by conjugated molecules which is expected to give new insights into the electron transport mechanisms through single molecules.

使用单一共轭分子作为电子器件中的活性组分目前被认为是基于半导体的纳米电子器件的替代方案，因为它直接提供了明确定义的纳米级结构单元。然而，尚未对此类器件中的金属-分子接触和电子传输机制有详细的了解。在这里，硫醇官能化的共轭聚合物应沉积在纳米光刻制备的金蝴蝶结纳米天线之间。这些纳米天线提供了入射电磁场的巨大增强，从而允许单分子表面增强拉曼光谱研究，预计与散射和单分子荧光调查一起，可以更深入地了解分子-金属接触的性质。通过将电场施加到由共轭分子桥接的纳米天线上，可以尝试同时测量单分子的光学和电子输运性质的未知制度，这有望为单分子的电子输运机制提供新的见解。