Academic Journal
Tuneable interphase transitions in ionic liquid/carrier systems via voltage control
| Τίτλος: | Tuneable interphase transitions in ionic liquid/carrier systems via voltage control |
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| Συγγραφείς: | Li, Sichao, Author, Pilkington, Georgia, Author, Mehler, Filip, Author, Hammond, Oliver S., Author, Boudier, Anthony, Author, Vorobiev, Alexei, Author, Glavatskih, Sergei, Author, Rutland, Mark W., Professor, Author |
| Συνεισφορές: | Li, Sichao, Author, Pilkington, Georgia, Author, Mehler, Filip, Author, Hammond, Oliver S., Author, Boudier, Anthony, Author, Vorobiev, Alexei, Author, Glavatskih, Sergei, Author, Rutland, Mark W., Professor, Author |
| Πηγή: | Journal of Colloid and Interface Science. 652:1240-1249 |
| Θεματικοί όροι: | Electric double-layer structure, Interfacial layers, Neutron reflectivity, Non-halogenated ionic liquids, Quartz crystal microbalance |
| Περιγραφή: | The structure and interaction of ionic liquids (ILs) influence their interfacial composition, and their arrangement (i.e., electric double-layer (EDL) structure), can be controlled by an electric field. Here, we employed a quartz crystal microbalance (QCM) to study the electrical response of two non-halogenated phosphonium orthoborate ILs, dissolved in a polar solvent at the interface. The response is influenced by the applied voltage, the structure of the ions, and the solvent polarizability. One IL showed anomalous electro-responsivity, suggesting a self-assembly bilayer structure of the IL cation at the gold interface, which transitions to a typical EDL structure at higher positive potential. Neutron reflectivity (NR) confirmed this interfacial structuring and compositional changes at the electrified gold surface. A cation-dominated self-assembly structure is observed for negative and neutral voltages, which abruptly transitions to an anion-rich interfacial layer at positive voltages. An interphase transition explains the electro-responsive behaviour of self-assembling IL/carrier systems, pertinent for ILs in advanced tribological and electrochemical contexts. |
| Περιγραφή αρχείου: | |
| Σύνδεσμος πρόσβασης: | https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-336564 https://doi.org/10.1016/j.jcis.2023.08.111 |
| Βάση Δεδομένων: | SwePub |
| ISSN: | 00219797 10957103 |
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| DOI: | 10.1016/j.jcis.2023.08.111 |