| Autor: |
Yuan J, Antila HS, Luijten E |
| Jazyk: |
angličtina |
| Zdroj: |
ACS macro letters [ACS Macro Lett] 2019 Feb 19; Vol. 8 (2), pp. 183-187. Date of Electronic Publication: 2019 Jan 25. |
| DOI: |
10.1021/acsmacrolett.8b00881 |
| Abstrakt: |
Surface-grafted polyelectrolytes provide a versatile way to create functionalized interfaces and nanochannels with externally controllable properties. Understanding the behavior of ions within the brush-like assemblies is crucial for the further development of these devices. We demonstrate that the ion transport through the brushes is governed by the interplay of electrostatic ion-polymer binding and steric effects, leading to a mobility that depends nonmonotonically on grafting density. However, the ion-polymer binding can be modulated by the dielectric properties of the substrate. As a result, surface polarization suppresses ion mobility near insulating interfaces and enhances it near conducting interfaces, even causing a shift from nonmonotonic to monotonic variation with grafting density. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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