@article{Liu2023, 
author = {Yangbiao Liu and Marc Zeplichal and Sonja Katzbach and Adrian Wiesner and Saunak Das and Andreas Terfort and Michael Zharnikov},
title = {Aromatic self-assembled monolayers with pentafluoro-λ6-sulfanyl (−SF5) termination: Molecular organization and charge transport properties},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {5},
pages = {7991-8002},
url = {https://www.sciopen.com/article/10.1007/s12274-022-5350-8},
doi = {10.1007/s12274-022-5350-8},
abstract = {A series of molecules with oligophenylene backbone, thiolate anchoring group, and pentafluoro-λ6-sulfanyl (−SF5) tail group was synthesized and used as precursors to form self-assembled monolayers (SAMs) on Au(111) substrates. The resulting SAMs feature dense molecular packing, upright molecular orientation, and chemically homogeneous SAM-ambient interface, comprised entirely of the −SF5 moieties. These SAMs exhibit exceptional wetting and electrostatic properties, showing advancing water contact angles up to 103° and work function values up to 5.96 eV—probably the highest values reported for any aromatic monolayers on gold. They also feature a comparably low value of the tunnelling decay coefficient (0.38 ± 0.07 Å−1), typical of oligophenylene backbone, which is not affected by the introduction of the −SF5 group. The latter also hardly affects the current densities at a specific bias compared to analogous monolayers with other electronegative tail groups. The superior electrostatic and good charge transport properties of the designed, SF5-terminated SAMs make them potentially useful for interface engineering in organic electronics and photovoltaics.}
}