Employing molecular co-adsorption and switchable molecules for increasing structural complexity in self-assembly on dielectric substrates

采用分子共吸附和可切换分子来增加介电基板上自组装的结构复杂性

• 批准号: 5449045
• 负责人: Professorin Dr. Angelika Kühnle
• 金额: --
• 依托单位: Arbeitsgruppe Physikalische Chemie I
• 依托单位国家: 德国
• 项目类别: Independent Junior Research Groups
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5449045?language=en
• 关键词: Employing; molecular; co; adsorption; switchable

Molecular self-assembly on surfaces represents a promising strategy for creating future molecular devices with tailor-made properties and functionality. While molecular selfassembly has been studied extensively on metallic surfaces, the investigation of molecular interactions with dielectric surfaces is still in its infancy. Within the first part of this Emmy Noether-project, atomically resolved images of dielectric substrate surfaces were obtained. We deposited various organic molecules and observed individual molecules, extended molecular structures as well as uni-directional growth on different dielectric substrates. This application directly builds on the achievements obtained in the fist part of the project. The focus of this project is on exploring molecular structure formation upon coadsorption of organic molecules on truly insulating substrates. Molecular co-adsorption provides further flexibility and control in molecular self-assembly, allowing for precise tuning of structural properties. Complementary molecules will be studied as well as molecules known for building extended networks that can serve as host for further guest molecules. Another promising approach for creating novel molecular structures is deposition of molecular species that can change conformation after self-assembly. In this project, switchable molecules will be investigated and light- and voltage-pulse induced conformational changes will be explored.

表面上的分子自组装代表了一种很有前途的策略，可以创造出具有定制特性和功能的未来分子器件。虽然分子自组装已经在金属表面上得到了广泛的研究，但分子与介电表面相互作用的研究仍处于起步阶段。在这个Emmy noether项目的第一部分，获得了电介质衬底表面的原子分辨图像。我们沉积了各种有机分子，并观察了单个分子，扩展分子结构以及在不同介质衬底上的单向生长。该应用程序直接建立在项目第一部分所取得的成果之上。这个项目的重点是探索有机分子在真正绝缘的衬底上共吸附时分子结构的形成。分子共吸附为分子自组装提供了进一步的灵活性和控制，允许精确调整结构特性。互补分子将被研究，以及已知的分子建立扩展网络，可以作为进一步的客人分子的宿主。另一种有希望创造新分子结构的方法是沉积分子物种，这些分子物种可以在自组装后改变构象。在这个项目中，将研究可切换分子，并探索光和电压脉冲诱导的构象变化。