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论文类型：期刊论文

发表时间：2017-04-20

发表刊物：BEILSTEIN JOURNAL OF NANOTECHNOLOGY

收录刊物：SCIE、EI、PubMed、Scopus

卷号：8

期号：1

页面范围：892-905

ISSN号：2190-4286

关键字：organic thin films; selenolates; self-assembled monolayers; thiolates; triptycene

摘要：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.