Effect of an Applied Potential and Added Electrolyte on the Structure and Nanotribology of Electrode/IL Interfaces
Event details
| Date | 09.07.2012 |
| Hour | 15:00 |
| Speaker | Rob Atkin, University of Newcastle, Australia |
| Location |
CHG1494
|
| Category | Conferences - Seminars |
The effect of an applied potential on the nanostructure of the 1-hexyl-3-methylimidazolium tris(pentafluoroethyl) trifluorophosphate [HMIm]FAP / Au(111) interface has been investigated using atomic force microscopy. At open circuit potential (OCP) the interfacial layer, adsorbed to the surface, is likely mixed but enriched in cations. At higher potentials the level of interfacial liquid structure increases. At negative potentials the level of cation enrichment increases, while at positive potentials the layer is enriched in the anion. Addition of small amount of inorganic electrolyte reduces the interfacial forces for both positive and negative potentials, but the effect is particularly pronounced at OCP, where attractive forces are noted that suggest very weak structure. Lateral forces have also been measured as a function of potential in the absence of electrolyte. The data suggests that the cation layer adsorbed at negative potentials is more lubricating than the anion layer adsorbed at positive potentials.
Practical information
- General public
- Free
Organizer
- Voitchovsky Kislon <[email protected]>
Contact
- Voitchovsky Kislon <[email protected]>