This thesis explores the mechanics of single molecule machines on a surface, aiming to understand the principles underlying synthetic single molecular machines. The study utilizes scanning tunneling microscopy (STM) at ultra-low temperatures and high vacuum conditions to investigate individual small molecules adsorbed on a substrate. In the first part, the transmission of rotation between single molecule-gears is examined, employing a star-shaped pentaphenylcyclopentadiene molecule manipulated by STM. The second part focuses on a zwitterionic and chiral molecule's dual functionality as a molecule-rotor or a molecule-vehicle (nanocar), with motion driven by tunneling electrons. The third part explores the origin of unidirectional rotation in a single molecule-rotor, analyzing the effects of thermal and electronic excitations on rotation dynamics. Overall, this work contributes to the fundamental understanding of nanoscale mechanical molecular devices and their potential applications.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:90122 |
| Date | 23 February 2024 |
| Creators | Au-Yeung, Kwan Ho |
| Contributors | Cuniberti, Gianaurelio, Joachim, Christian, Eng, Lukas, Technische Universität Dresden |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:doctoralThesis, info:eu-repo/semantics/doctoralThesis, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
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