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Triptycene-terminated thiolate and selenolate monolayers on Au(111)

Liu, Jinxuan; Kind, Martin; Schüpbach, Björn; Käfer, Daniel; Winkler, Stefanie; Zhang, Wenhua; Terfort, Andreas; Wöll, Christof

To study the implications of highly space-demanding organic moieties on the properties of self-assembled monolayers (SAMs), triptycyl thiolates and selenolates with and without methylene spacers on Au(111) surfaces were comprehensively studied using ultra-high vacuum infrared reflection absorption spectroscopy, X-ray photoelectron spectroscopy, near-edge X-ray absorption fine structure spectroscopy and thermal desorption spectroscopy. Due to packing effects, the molecules in all monolayers are substantially tilted. In the presence of a methylene spacer the tilt is slightly less pronounced. The selenolate monolayers exhibit smaller defect densities and therefore are more densely packed than their thiolate analogues. The Se–Au binding energy in the investigated SAMs was found to be higher than the S–Au binding energy.

Zugehörige Institution(en) am KIT Institut für Funktionelle Grenzflächen (IFG)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator DOI: 10.3762/bjnano.8.91
ISSN: 2190-4286
KITopen ID: 1000069552
HGF-Programm 43.22.01; LK 01
Erschienen in Beilstein journal of nanotechnology
Band 8
Seiten 892–905
Schlagworte organic thin films; selenolates; self-assembled monolayers; thiolates; triptycene
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