Adsorption of 3,4-ethylenedioxythiophene (EDOT) on noble metal surfaces: A photoemission and X-ray absorption study



: Pasquali L, Terzi F, Montecchi M, Doyle BP, Lukkari J, Zanfrognini B, Seeber R, Nannarone S

Publisher: ELSEVIER SCIENCE BV

: 2009

 Journal of Electron Spectroscopy and Related Phenomena

: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA

: J ELECTRON SPECTROSC

: 172

: 1-3

: 114

: 119

: 6

: 0368-2048

DOI: https://doi.org/10.1016/j.elspec.2009.03.014


The adsorption of 3,4-ethylenedioxythiophene (EDOT) on Au and Pt surfaces is studied by core level and valence band photoemission using synchrotron radiation and by near edge X-ray absorption spectroscopy. To closer simulate real applications, the films are grown from aqueous solution at room temperature and are compared to an 'ideal' film prepared by dosing the molecules from the vapour phase on a clean Au(1 1 1) single crystal. The S 2p. C 1s and O 1s levels show multiple components which are associated to molecular fragmentation. NEXAFS confirms that fragmentation takes place at the surface. Thiophene species as well as alkyl chains and S(n) species are identified as the most probable fragmentation products. (C) 2009 Elsevier B.V. All rights reserved.



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