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SUMMARY:Optimizing liquid-solid slip in nanofluidic systems - Laurent Joly
 \, Univ Lyon\, Univ Claude Bernard Lyon 1\, CNRS\, Institut Lumière Mati
 ère
DTSTART:20220720T100000Z
DTEND:20220720T103000Z
UID:TALK176504@talks.cam.ac.uk
CONTACT:Dr Christoph Schran
DESCRIPTION:Nanofluidic systems\, e.g. natural nanoporous materials or eng
 ineered nanochannels made from new 2D materials\, could provide alternativ
 e solutions to critical societal challenges such as water desalination or 
 energy harvesting. At the nanoscale\, surface effects become crucial\; in 
 particular\, liquid-solid slip arising from low liquid-solid friction can 
 boost the performance of nanofluidic systems. In that context\, I will ill
 ustrate with some recent work how molecular dynamics simulations can help 
 understand the molecular mechanisms of liquid-solid friction\, and optimiz
 e liquid-solid slip.\n\nFirst\, I will briefly discuss some recent progres
 s regarding the molecular modeling of interfacial slip and friction [1]\, 
 and show how ab initio molecular dynamics can provide a new insight into t
 he structural and dynamical origin of liquid-solid friction [2]. Then\, I 
 will discuss a challenge related to nanofluidic systems for electricity pr
 oduction: optimal performance indeed requires charged and slipping surface
 s\, while these two properties are contradictory. Here we have shown that 
 the charge-friction relationship strongly depends on how the surface charg
 e is generated\, and identified promising candidates for optimal charge-fr
 iction coupling [3]. Finally\, I will show that water slip can be boosted 
 when the liquid is "supercooled"\, and investigate the origin of this unex
 pected effect [4].\n\nReferences\n\n[1]	H. Oga\, T. Omori\, C. Herrero\, S
 . Merabia\, L. Joly\, Y. Yamaguchi: “Theoretical framework for the atomi
 stic modeling of frequency-dependent liquid-solid friction”\, Phys. Rev.
  Research 3\, L032019 (2021)\n\n[2]	G. Tocci\, M. Bilichenko\, L. Joly\, M
 . Iannuzzi: “Ab initio Nanofluidics: Disentangling the role of the energ
 y landscape and of density correlations on liquid/solid friction”\, Nano
 scale 12\, 10994 (2020)\n\n[3]	Y. Xie\, L. Fu\, T. Niehaus\, L. Joly: “L
 iquid-solid slip on charged walls: the dramatic impact of charge distribut
 ion”\, Phys. Rev. Lett. 125\, 014501 (2020)\n\n[4]	C. Herrero\, G. Tocci
 \, S. Merabia\, L. Joly: “Fast Increase of Nanofluidic Slip in Supercool
 ed Water: the Key Role of Dynamics”\, Nanoscale 12\, 20396 (2020)
LOCATION:Cambridge University Engineering Department\, Lecture Theater 2
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