This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1088/0953-8984/26/28/284110 in citations.
Force microscopy of layering and friction in an ionic liquidus
Force microscopy of layering and friction in an ionic liquidus
The mechanical properties of the ionic liquid 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl) trifluorophosphate ([Py1,4][FAP]) in confinement between a SiOx and a Au(1 1 1) surface are investigated by means of atomic force microscopy (AFM) under electrochemical control. Up to 12 layers of ion...
Saved in:
Personal Name(s): | Hoth, Judith (Corresponding Author) |
---|---|
Hausen, Florian / Müser, Martin / Bennewitz, Roland | |
Contributing Institute: |
Jülich Supercomputing Center; JSC |
Published in: | Journal of physics / Condensed matter, 26 (2014) 28, S. 284110 |
Imprint: |
Bristol
IOP Publ.
2014
|
PubMed ID: |
24919549 |
DOI: |
10.1088/0953-8984/26/28/284110 |
Document Type: |
Journal Article |
Research Program: |
Computational Science and Mathematical Methods |
Publikationsportal JuSER |
The mechanical properties of the ionic liquid 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl) trifluorophosphate ([Py1,4][FAP]) in confinement between a SiOx and a Au(1 1 1) surface are investigated by means of atomic force microscopy (AFM) under electrochemical control. Up to 12 layers of ion pairs can be detected through force measurements while approaching the tip of the AFM to the surface. The particular shape of the force versus distance curve is explained by a model for the interaction between tip, gold surface and ionic liquid, which assumes an exponentially decaying oscillatory force originating from bulk liquid density correlations. Jumps in the tip–sample distance upon approach correspond to jumps of the compliant force sensor between branches of the oscillatory force curve. Frictional force between the laterally moving tip and the surface is detected only after partial penetration of the last double layer between tip and surface. |