Ordering of air-oxidized decanethiols on Au(111)
TLDR
In this paper, the authors used scanning tunneling microscopy and X-ray photoelectron spectroscopy to show that decanethiolate molecules oxidize into decanesulfonates that organize into a hitherto unknown striped phase.Abstract:
Self-assembled monolayers (SAMs) of alkanethiols on gold are a commonly used platform for nanotechnology owing to their ease of preparation and high surface coverage. Unfortunately, the gold-sulfur bond is oxidized at ambient conditions which alters the stability and structure of the monolayer. We show using scanning tunneling microscopy and X-ray photoelectron spectroscopy that decanethiolate molecules oxidize into decanesulfonates that organize into a hitherto unknown striped phase. Air-exposed SAMs oxidize, as can be determined by a shift of the S 2p peak and the appearance of O 1s photoelectrons as part of the decanethiol monolayer transforms into a lamellae-like decanesulfonate structure when exposed to air. The herringbone structure of the Au(111) surface is preserved, indicating that the interaction between the molecules and the surface is rather weak as these findings are substantiated by density functional theory calculations.read more
Citations
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An Arylazopyrazole-Based N-Heterocyclic Carbene as a Photoswitch on Gold Surfaces: Light-Switchable Wettability, Work Function, and Conductance.
D. Thao Nguyen,Matthias Freitag,Christian Gutheil,Kai Sotthewes,Bonnie J. Tyler,Marcus Böckmann,Mowpriya Das,Friederike Schlüter,Nikos L. Doltsinis,Heinrich F. Arlinghaus,Bart Jan Ravoo,Frank Glorius +11 more
TL;DR: The properties of AAP-BIMe@Au illustrate its suitability as a molecular switch for novel electronic devices, and is the first example of a photoswitchable NHC on an Au surface.
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Comparative study of structural order, thermal desorption behavior, and work function change of self-assembled monolayers of pentafluorobenzenethiols and tetrafluorobenzenethiols on Au(1 1 1)
Hungu Kang,Hungu Kang,Sicheon Seong,Eisuke Ito,Takashi Isoshima,Masahiko Hara,Hyo Jae Yoon,Jaegeun Noh +7 more
TL;DR: In this paper, the effect of dipole directions in fluorinated aromatic thiol SAMs using scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), thermal desorption spectrography (TDS), and Kelvin probe (KP) measurements was examined.
Journal ArticleDOI
Formation and Surface Structures of Highly Ordered Self-Assembled Monolayers of Alkyl Selenocyanates on Au(111) via Ambient-Pressure Vapor Deposition
Seulki Han,Sicheon Seong,Young Ji Son,Yasuyuki Yokota,Tomohiro Hayashi,Masahiko Hara,Jaegeun Noh +6 more
TL;DR: In this article, the formation and surface structures of self-assembled monolayers (SAMs) of octyl selenocyanate (OSC, CH3(CH2)7-SeCN) on Au(111) prepared by solution and ambient-pressure vapor deposition were inve...
Journal ArticleDOI
Nanoscale Work Function Contrast Induced by Decanethiol Self-Assembled Monolayers on Au(111).
Martina Tsvetanova,Valent J S Oldenkotte,M. Candelaria Bertolino,Yuqiang Gao,Martin Herman Siekman,Jurriaan Huskens,Harold J.W. Zandvliet,Kai Sotthewes +7 more
TL;DR: The pillow effect, governing the lowering of the work function due to lying-down molecular tails in the striped low density phases, seems to have quite a similar contribution as the surface dipole effect emerging in the dense standing-up decanethiol phases.
Journal ArticleDOI
Ein auf Arylazopyrazol basierendes N-heterocyclisches Carben als Photoschalter auf Goldoberflächen: Lichtschaltbare Benetzbarkeit, Austrittsarbeit und Leitwert
D. Thao Nguyen,Matthias Freitag,Christian Gutheil,Kai Sotthewes,Bonnie J. Tyler,Marcus Böckmann,Mowpriya Das,Friederike Schlüter,Nikos L. Doltsinis,Heinrich F. Arlinghaus,Bart Jan Ravoo,Frank Glorius +11 more
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