Liquid/solid interface of ultrathin ionic liquid films: [C 1C1Im][Tf2N] and [C8C 1Im][Tf2N] on Au(111)

Journal article


Publication Details

Author(s): Cremer T, Stark MW, Deyko A, Steinrück HP, Maier F
Journal: Langmuir
Publisher: American Chemical Society
Publication year: 2011
Volume: 27
Journal issue: 7
Pages range: 3662-3671
ISSN: 0743-7463
eISSN: 1520-5827


Abstract


Ultrathin films of two imidazolium-based ionic liquids (IL), [C CIm][TfN] (= 1,3-dimethylimidazolium bis(trifluoromethyl)imide) and [CCIm][TfN] (= 1-methyl-3-octylimidazolium bis(trifluoromethyl)imide) were prepared on a Au(111) single-crystal surface by physical vapor deposition in ultrahigh vacuum. The adsorption behavior, orientation, and growth were monitored via angle-resolved X-ray photoelectron spectroscopy (ARXPS). Coverage-dependent chemical shifts of the IL-derived core levels indicate that for both ILs the first layer is formed from anions and cations directly in contact with the Au surface in a checkerboard arrangement and that for [CC Im][TfN] a reorientation of the alkyl chain with increasing coverage is found. For both ILs, geometry models of the first adsorption layer are proposed. For higher coverages, both ILs grow in a layer-by-layer fashion up to thicknesses of at least 9 nm (>10 ML). Moreover, beam damage effects are discussed, which are mainly related to the decomposition of [TfN] anions directly adsorbed at the gold surface. © 2011 American Chemical Society.



FAU Authors / FAU Editors

Cremer, Till Dr.
Lehrstuhl für Physikalische Chemie II
Deyko, Alexey Dr.
Lehrstuhl für Physikalische Chemie II
Maier, Florian Dr.
Lehrstuhl für Physikalische Chemie II
Stark, Michael Werner
Lehrstuhl für Physikalische Chemie II
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


Research Fields

D Catalytic Materials
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Cremer, T., Stark, M.W., Deyko, A., Steinrück, H.-P., & Maier, F. (2011). Liquid/solid interface of ultrathin ionic liquid films: [C 1C1Im][Tf2N] and [C8C 1Im][Tf2N] on Au(111). Langmuir, 27(7), 3662-3671. https://dx.doi.org/10.1021/la105007c

MLA:
Cremer, Till, et al. "Liquid/solid interface of ultrathin ionic liquid films: [C 1C1Im][Tf2N] and [C8C 1Im][Tf2N] on Au(111)." Langmuir 27.7 (2011): 3662-3671.

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Last updated on 2019-22-07 at 07:15