Resolving the structure of organic nano strands self-assembled at a graphite-liquid interface using STM
| Autor: | Nadine Diek, Loji K. Thomas, Michael Reichling, Uwe Beginn |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
General Physics and Astronomy 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention symbols.namesake Tetramer law Nano Monolayer Alkyl chemistry.chemical_classification Hydrogen bond Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Surfaces Coatings and Films chemistry Chemical physics symbols Self-assembly van der Waals force Scanning tunneling microscope 0210 nano-technology |
| Zdroj: | Applied Surface Science. 481:684-691 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2019.03.072 |
| Popis: | Scanning tunneling microscopy (STM) at solution-graphite(0001) interface is used to identify nanometer-wide elementary strands of custom-designed ampiphilic benzamides and elucidate their internal structure with sub-molecular resolution. Evidences against graphitic artifacts that often mimic organic strands are provided, thereby unambiguously establishing the molecular origin of these strands. The aliphatic chain lengths are chosen based on bulk studies so as to promote strand architectures and avoid monolayer structures. Two different chain lengths are used to decipher the structural parameters and the results suggest hitherto unknown precursor routes to strand formation on a surface that is different from columnar mesophases in bulk. An on-surface self-assembly into hydrogen-bonded tetramer precursors and their subsequent interaction with other units via van der Waals forces between the dangling alkyl chains is proposed for strand formation on the surface. |
| Databáze: | OpenAIRE |
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