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Electro-responsivit...
Electro-responsivity of ionic liquid boundary layers in a polar solvent revealed by neutron reflectance
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- Pilkington, Georgia A. (author)
- KTH,Yt- och korrosionsvetenskap,KTH Royal Institute of Technology, Sweden,Surface and Corrosion Science, Department of Chemistry, KTH Royal Institute of Technology,KTH Royal Inst Technol, Dept Chem, Surface & Corros Sci, Stockholm, Sweden
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- Harris, Kathryn L (author)
- KTH,Maskinkonstruktion (Inst.),System and Component Design, Department of Machine Design, KTH Royal Institute of Technology,KTH Royal Institute of Technology, Sweden,KTH Royal Inst Technol, Dept Machine Design, Syst & Component Design, Stockholm, Sweden
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- Bergendal, Erik (author)
- KTH,Yt- och korrosionsvetenskap,KTH Royal Institute of Technology, Sweden,Surface and Corrosion Science, Department of Chemistry, KTH Royal Institute of Technology,KTH Royal Inst Technol, Dept Chem, Surface & Corros Sci, Stockholm, Sweden
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- Reddy, Akepati Bhaskar (author)
- KTH,Maskinkonstruktion (Inst.),System and Component Design, Department of Machine Design, KTH Royal Institute of Technology,KTH Royal Institute of Technology, Sweden,KTH Royal Inst Technol, Dept Machine Design, Syst & Component Design, Stockholm, Sweden
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- Pálsson, Gunnar K. (author)
- Uppsala universitet,Materialfysik
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- Vorobiev, Alexei (author)
- Uppsala universitet,Materialfysik
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- Antzutkin, Oleg N. (author)
- Luleå tekniska universitet,Kemiteknik,Lulea Univ Technol, Chem Interfaces, Lulea, Sweden
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- Glavatskih, Sergei (author)
- KTH,Maskinkonstruktion (Avd.),KTH Royal Institute of Technology, Sweden ; Ghent University, Belgium,System and Component Design, Department of Machine Design, KTH Royal Institute of Technology,KTH Royal Inst Technol, Dept Machine Design, Syst & Component Design, Stockholm, Sweden;Univ Ghent, Dept Elect Energy Syst & Automat, Ghent, Belgium
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- Rutland, Mark W. (author)
- KTH,RISE,Kemi och material,KTH Royal Institute of Technology, Sweden,Yt- och korrosionsvetenskap,RISE Research Institutes of Sweden,Surface and Corrosion Science, Department of Chemistry, KTH Royal Institute of Technology,KTH Royal Inst Technol, Dept Chem, Surface & Corros Sci, Stockholm, Sweden;RISE Res Inst Sweden, Surfaces Proc & Formulat, Stockholm, Sweden
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(creator_code:org_t)
- AIP Publishing, 2018
- 2018
- English.
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In: Journal of Chemical Physics. - : AIP Publishing. - 0021-9606 .- 1089-7690. ; 148:19
- Related links:
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https://doi.org/10.1...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Using neutron reflectivity, the electro-responsive structuring of the non-halogenated ionic liquid (IL) trihexyl(tetradecyl)phosphonium-bis(mandelato)borate, [P6,6,6,14][BMB], has been studied at a gold electrode surface in a polar solvent. For a 20% w/w IL mixture, contrast matched to the gold surface, distinct Kiessig fringes were observed for all potentials studied, indicative of a boundary layer of different composition to that of the bulk IL-solvent mixture. With applied potential, the amplitudes of the fringes from the gold-boundary layer interface varied systematically. These changes are attributable to the differing ratios of cations and anions in the boundary layer, leading to a greater or diminished contrast with the gold electrode, depending on the individual ion scattering length densities. Such electro-responsive changes were also evident in the reflectivities measured for the pure IL and a less concentrated (5% w/w) IL-solvent mixture at the same applied potentials, but gave rise to less pronounced changes. These measurements, therefore, demonstrate the enhanced sensitivity achieved by contrast matching the bulk solution and that the structure of the IL boundary layers formed in mixtures is strongly influenced by the bulk concentration. Together these results represent an important step in characterising IL boundary layers in IL-solvent mixtures and provide clear evidence of electro-responsive structuring of IL ions in their solutions with applied potential.
Subject headings
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Keyword
- Electrodes
- Gold
- Ionic liquids
- Ions
- Mixtures
- Reflection
- Solvents
- Applied potentials
- Bulk concentration
- Contrast matching
- Enhanced sensitivity
- Liquid boundary layers
- Neutron reflectance
- Neutron reflectivity
- Solvent mixtures
- Boundary layers
- Chemistry of Interfaces
Publication and Content Type
- ref (subject category)
- art (subject category)
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