Influence of Multidirectional Interactions on Domain Size and Shape of 2-D Molecular Assemblies
| Autor: | Nobuhiko Nishitani, Takashi Hirose, Kenji Matsuda |
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| Rok vydání: | 2017 |
| Předmět: |
Nucleation
02 engineering and technology Surfaces and Interfaces Urea increased 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound Crystallography chemistry law Amide Intramolecular force Domain (ring theory) Electrochemistry Molecule General Materials Science Scanning tunneling microscope 0210 nano-technology Spectroscopy Equilibrium constant |
| Zdroj: | Langmuir. 33:9151-9159 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/acs.langmuir.7b02094 |
| Popis: | The effect of molecule–molecule interactions on the size and shape of two-dimensional (2-D) ordering domains was investigated using scanning tunneling microscopy (STM) at the liquid/solid interface. Synthesized alkoxybenzene derivatives bearing amide group tend to form very large domains of 2-D orderings (>0.25 μm2), whereas the domain size of corresponding urea derivatives was significantly small in the same condition. The quantitative analysis of the concentration dependence of surface coverage using a nucleation–elongation model suggests that the replacement of amide functionality by urea increased the equilibrium constant of the nucleation process of 2-D self-assembly, which is a key factor for the domain size at the liquid/solid interface. Interestingly, the STM observation revealed that a slight difference of molecular structure influences the shape of 2-D ordering domains, and needle-shaped domains with large aspect ratio around 10 were observed by tuning molecule−molecule intramolecular interactio... |
| Databáze: | OpenAIRE |
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