Time-dependent changes in the growth of ultrathin ionic liquid films on Ag(111)

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Lexow M, Talwar T, Heller B, May B, Bhuin RG, Maier F, Steinrück HP
Zeitschrift: Physical Chemistry Chemical Physics
Verlag: ROYAL SOC CHEMISTRY
Jahr der Veröffentlichung: 2018
Band: 20
Heftnummer: 18
Seitenbereich: 12929-12938
ISSN: 1463-9076
eISSN: 1463-9084


Abstract

Various amounts of the ionic liquids (ILs) [C(1)C(1)Im][Tf2N] and [C(8)C(1)Im][Tf2N] were deposited in vacuo by physical vapour deposition (PVD) on single crystalline Ag(111) at room temperature and subsequently monitored by angle-resolved X-ray photoelectron spectroscopy (ARXPS) as a function of time. For very low coverages of up to one closed molecular layer, an initial wetting layer was rapidly formed for both ILs. Deposition of higher amounts of [C(1)C(1)Im][Tf2N] revealed an initial three-dimensional film morphology. On the time scale of hours, characteristic changes of the XPS signals were observed. These are interpreted as island spreading and a transformation towards a nearly two dimensional [C(1)C(1)Im][Tf2N] film as the final state. In contrast, a film morphology close to 2D was found from the very beginning for [C(8)C(1)Im][Tf2N] deposited on Ag(111) demonstrating the influence of the alkyl chain length on the growth kinetics. These studies also highlight the suitability of time-resolved ARXPS for the investigation of IL/solid interfaces, which play a crucial role in IL thin film applications such as in catalysis, sensor, lubrication, and coating technologies.


FAU-Autoren / FAU-Herausgeber

Bhuin, Radha Gobinda
Lehrstuhl für Physikalische Chemie II
Heller, Bettina
Lehrstuhl für Physikalische Chemie II
Lexow, Matthias
Lehrstuhl für Physikalische Chemie II
Maier, Florian Dr.
Lehrstuhl für Physikalische Chemie II
May, Benjamin
Lehrstuhl für Physikalische Chemie II
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II


Zitierweisen

APA:
Lexow, M., Talwar, T., Heller, B., May, B., Bhuin, R.G., Maier, F., & Steinrück, H.-P. (2018). Time-dependent changes in the growth of ultrathin ionic liquid films on Ag(111). Physical Chemistry Chemical Physics, 20(18), 12929-12938. https://dx.doi.org/10.1039/c8cp01411f

MLA:
Lexow, Matthias, et al. "Time-dependent changes in the growth of ultrathin ionic liquid films on Ag(111)." Physical Chemistry Chemical Physics 20.18 (2018): 12929-12938.

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Zuletzt aktualisiert 2018-02-08 um 13:08