Molecular insights into the electrowetting behavior of aqueous ionic liquids

Bhattacharjee, Sanchari; Khan, Sandip

doi:10.1039/d1cp01821c

Cited by 2 publications

(1 citation statement)

References 71 publications

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“…A handful of researchers cover this in their reviews of ILs responding to exposure of UV light, heat, pH, solvents, doping, magnetic fields, and EEFs. ,, In addition, a refrigeration cycle has been proposed that takes advantage of the effect that EEFs have on ionic phase-changing materials, which include imidazolium based ILs with chloride and bromide anions . EEFs have been employed to facilitate transport in biological systems, as a catalytic effect, to enhance lubrication, and to facilitate electrowetting of surfaces. ,− Nevertheless, studies examining the effect of EEFs on bulk thermodynamic properties of ILs such as density, heat capacity, phase behavior, and T g are rare …”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Simulation of the Influence of External Electric Fields on the Glass Transition Temperature of the Ionic Liquid 1-Ethyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide

Carmona Esteva,

Zhang,

Colón

et al. 2023

J. Phys. Chem. B

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We present the results of molecular dynamics simulations of the ionic liquid (IL) 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [C2C1im][NTf2] in the presence of external electric fields (EEFs) of varying strengths to understand the effects of EEFs on the glass transition temperature T g. We compute T g with an automated and objective method and observe a depression in T g when cooling the IL within an EEF above a critical strength. The effect is reversible, and glasses prepared with EEFs recover their original zero-field T g when heated. By examining the dynamics and structure of the liquid phase, we find that the EEF lowers the activation energy for diffusion, reducing the energetic barrier for movement and consequently T g. We show that the effect can be leveraged to drive an electrified nonvapor compression refrigeration cycle.

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