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An in Situ STM and DTS Study of the Extremely Pure [EMIM]FAP/Au(111) Interface
Author(s) -
Borisenko Natalia,
Zein El Abedin Sherif,
Endres Frank
Publication year - 2012
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201100873
Subject(s) - scanning tunneling microscope , cyclic voltammetry , ionic liquid , in situ , chemistry , analytical chemistry (journal) , quantum tunnelling , electrode , electrochemistry , spectroscopy , horizontal scan rate , cathodic protection , materials science , nanotechnology , catalysis , optoelectronics , organic chemistry , physics , quantum mechanics
Herein the structure of the interfacial layer between the air‐ and water‐stable ionic liquid 1‐ethyl‐3‐methylimidazolium tris(pentafluoroethyl)trifluorophosphate ([EMIM]FAP) and Au(111) is investigated using in situ scanning tunneling microscopy (STM), distance tunneling spectroscopy (DTS) and cyclic voltammetry (CV) measurements. The in situ STM measurements reveal that structured interfacial layers can be probed in both cathodic and anodic regimes at the IL/Au(111) interface. The structure of these layers is dependent on the applied electrode potential, the number of subsequent STM scans and the scan rate. Furthermore, first DTS results show that the tunneling barrier during the 1st STM scan does not seem to change significantly in the cathodic potential regime between the ocp (−0.2 V) and −2.0 V.