Unique Orientation of the Solid–Solid Interface at the Janus Particle Boundary Induced by Ionic Liquids
| Autor: | Muhammad Qamar Farooq, Keyvan Mollaeian, Shan Jiang, Kyle Miller, Yifan Li, Stephen M. Anthony, Ayuna Tsyrenova, Fei Liu, Juan Ren, Jared L. Anderson |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Aqueous solution Hydrogen bond Janus particles 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Adsorption chemistry Chemical physics Amphiphile Ionic liquid Particle General Materials Science Janus Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | The Journal of Physical Chemistry Letters. 11:9834-9841 |
| ISSN: | 1948-7185 |
| Popis: | This study reveals the unique role on Janus particles of the solid-solid interface at the boundary in determining particle interactions and assembly. In an aqueous ionic liquid (IL) solution, Janus spheres adopt intriguing orientations with their boundaries pinned on the glass substrate. It was further discovered that the orientation was affected by the particle amphiphilicity as well as the chemical structure and concentration of the IL. Further characterization suggests that the adsorption on the hydrophilic side is due to both an electrostatic interaction and hydrogen bonding, while adsorption on the hydrophobic side is due to hydrophobic attraction. Through the concerted interplay of all these interactions, the amphiphilic boundary may attract an excessive amount of IL cations, which guide the unique orientations of the Janus spheres. The results highlight the importance of the Janus boundary that has not been recognized previously. Adsorption at the solid-solid interfaces may inspire new applications in areas such as separation and catalysis. |
| Databáze: | OpenAIRE |
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