Imperial College London
Portrait Picture

Professor Fernando Bresme

Faculty of Natural Sciences, Department of Chemistry

Professor of Chemical Physics
 
 
 
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Contact

 

+44 (0)20 7594 5886f.bresme Website

 
 
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Assistant

 

Miss Ravinder Dhaliwal +44 (0)20 7594 5717

 
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Location

 

207CMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Di:2020:10.1021/acsnano.0c05043,
author = {Di, Lecce S and Kornyshev, AA and Urbakh, M and Bresme, F},
doi = {10.1021/acsnano.0c05043},
journal = {ACS Nano},
pages = {13256--13267},
title = {Lateral ordering in nanoscale ionic liquid films between charged surfaces enhances lubricity.},
url = {http://dx.doi.org/10.1021/acsnano.0c05043},
volume = {14},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Electric fields modify the structural and dynamical properties of room temperature ionic liquids (RTILs) providing a physical principle to develop tunable lubrication devices. Using nonequilibrium molecular dynamics atomistic simulations, we investigate the impact of the composition of imidazolium RTILs on the in-plane ordering of ionic layers in nanogaps. We consider imidazolium cations and widely used anions featuring different molecular structures, spherical ([BF4]-), elongated surfactant-like ([C2SO4]-), and elongated with a more delocalized charge ([NTf2]-). The interplay of surface charge, surface polarity, and anion geometry enables the formation of crystal-like structures in [BF4]- and [NTf2]- nanofilms, while [C2SO4]- nanofilms form disordered layers. We study how the ordering of the ionic liquid lubricant in the nanogap affects friction. Counterintuitively, we find that the friction force decreases with the ability of the RTILs to form crystal-like structures in the confined region. The crystallization can be activated or inhibited by changing the polarity of the surface, providing a mechanism to tune friction with electric fields.
AU  - Di,Lecce S
AU  - Kornyshev,AA
AU  - Urbakh,M
AU  - Bresme,F
DO  - 10.1021/acsnano.0c05043
EP  - 13267
PY  - 2020///
SN  - 1936-0851
SP  - 13256
TI  - Lateral ordering in nanoscale ionic liquid films between charged surfaces enhances lubricity.
T2  - ACS Nano
UR  - http://dx.doi.org/10.1021/acsnano.0c05043
UR  - https://www.ncbi.nlm.nih.gov/pubmed/33054180
UR  - https://pubs.acs.org/doi/10.1021/acsnano.0c05043
UR  - http://hdl.handle.net/10044/1/83551
VL  - 14
ER  -
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