Imaging an ionic liquid adlayer by scanning tunneling microscopy at the solid vertical bar vacuum interface

Waldmann, Thomas and Huang, Hsin-Hui and Hoster, Harry E. and Hoefft, Oliver and Endres, Frank and Behm, R. Juergen (2011) Imaging an ionic liquid adlayer by scanning tunneling microscopy at the solid vertical bar vacuum interface. ChemPhysChem, 12 (14). pp. 2565-2567. ISSN 1439-4235

Abstract

Structure formation in an ionic liquid adlayer: First molecularly resolved scanning tunneling microscopy images of an ionic liquid adlayer ([Py1,4]+ [FAP]− (see image)), evaporated on a Au(111) surface, resolve a molecular pattern at 210 K with a distinct short range order, indicating a 2D solid, while at room temperature, the mobility of the adlayer is too high to resolve molecular features, as expected for a 2D liquid.