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Electric property of ionic liquid films
1Current Research – Electric field effect of magnetism in Pd and Pt
NaCl
What are ionic liquids?
Normally ionic crystals are solid at room temperature
801℃
They turn liquid at high temperature
Current Research – Electric field effect of magnetism in Pd and Pt
2
The larger the ions, the lower the melting point
Room temperature molten salt (RTMS, = ionic liquid)
TMPA TFSI Melting point 22℃
What are ionic liquids?
TMPA (cation) TFSI (anion)
Current Research – Electric field effect of magnetism in Pd and Pt
3
What are ionic liquid films (ILF)?
TMPA (cation) TFSI (anion)
Ionic liquid film
T. Ueki and M. Watanabe, Macromolecules 41, 3739 (2008).
polymerization
4Current Research – Electric field effect of magnetism in Pd and Pt
Electrostatic properties of ILF
D. Hayakawa et al., AIP Advances 6, 115305 (2016).
𝜀0𝑆𝐶 =
2𝑑EDL
𝜅EDL+𝑡MgO
𝜅MgO
From simple circuit analysis,
: surface area: EDL thickness: relative permittivity of EDL: MgO thickness: relative permittivity of MgO
Ions can move around freely to create Electric Double Layer (EDL)
→Large electron modulation!
5Current Research – Electric field effect of magnetism in Pd and Pt
Electrostatic properties of ILF𝜀0𝑆𝐶
𝐶 =2𝑑EDL
𝜅EDL+𝑡MgO
𝜅MgO
From impedance analysis,
D. Hayakawa et al., AIP Advances 6, 115305 (2016).
Inclement: Intercept:
If we assume , which is often the case with other ionic liquids, the thickness of EDL is around 1nm
Techniques and skills• IT
Microsoft Office Suite, Origin• Programming
LabVIEW• Techniques
Circuit analysis, impedance analysis, etc.• Equipment
SMU (source measurement unit), turbo pump, etc.
6Current Research – Electric field effect of magnetism in Pd and Pt
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