Friction on I?Modified Au(111) in a Tetraglyme Electrolyte

In situ electrochemical lateral force microscopy (EC-LFM) has been employed to study the ordered structure of Li+ containing tetraglyme (G4) in front I-modified Au(111) and its influence on friction as function normal load. Since effect water aprotic electrolytes is a critical issue, was also investigated. Lateral maps recorded at low load (FN<30 nN) show that adsorbed iodine forms ( independent potential. With increasing load, observed atomic corrugations both potentials (0.45 V ?0.4 V) are agreement with while returning decreasing Thus we conclude AFM tip penetrates into adlayer without irreversible wear. Astonishingly, no clear increase upon penetration adlayer; corresponding step found separation (FS) curves. On other hand, FS curves for pure G4 solvent electrolyte clearly showed several steps suggesting molecules forming up five layers. It noteworthy two different push-through forces innermost Considering higher reproducibility compared bare assume surface energy monolayer leads negligible interaction between adlayer, resulting less perturbations by solid phase an force. Charts vs. be applied potential concentration water.