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The Electrochemical Interface of Au(111) and Au(100) in HMIm-FAP Ionic Liquid

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The double layer properties of Au(111) and Au(100) in 1-hexyl-3-methylimidazolium (HMIm+) tris(pentafluoroethyl)trifluorophosphate (FAP) ionic liquid has been characterized by cyclic voltammetry, immersion experiments and in situ STM. Immersion experiments reveal an opposite trend of potential of zero total charge (pztc) on reconstructed and unreconstructed surfaces against the case of aqueous electrolytes, which may relate to the specific adsorption of ions on Au surface. Further in situ STM performed in the double layer region, show that both the Au(100) and Au(111) surfaces undergo the lifting of reconstruction and surface etching at positive and negative potential region of the pztc values, respectively. However, further surface etching on Au(100) was prevented by the formation of the ordered layer of HMIm+ cations.
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Keywords: Au(hkl); EC-STM; Electrochemistry; Ionic Liquids

Document Type: Research Article

Affiliations: Department for Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland

Publication date: 01 August 2016

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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