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DTSTAMP:20261109T160202Z
UID:6a5e2438da2bc750467273@ist.ac.at
DTSTART:20261203T110000
DTEND:20261203T120000
DESCRIPTION:Speaker: Adrien Sutter\nhosted by Baptiste Coquinot / Misha Lem
 eshko\nAbstract: Friction at solid-liquid interfaces governs liquid transp
 ort at the nanoscale and sets the performance of nanofluidic systems\, as 
 membranes for desalination and osmotic energy harvesting. Yet\, the unders
 tanding of its microscopic origins remains limited. Standard theoretical a
 nd numerical studies\, that genuinely do not consider fluctuations of the 
 solid material\, fail for example to explain anomalously low friction meas
 ured experimentally in carbon nanotubes. Here\, we develop a field theory 
 of the solid-liquid interface that incorporates both classical and quantum
  fluctuations of the confining solid. We provide a dynamical analogue\, fo
 r solid-liquid interfaces\, of the structural lubricity between incommensu
 rate solids: when the solid's phonons oscillate faster than the liquid mol
 ecules rearrange at the interface\, they dynamically smooth out the surfac
 e corrugation and friction can be significantly reduced. Under strong conf
 inement\, the same mechanism applies symmetrically to the liquid: long-wav
 elength acoustic modes in the liquid itself can further suppress friction.
  Such a regime is expected in nanometre-wide carbon nanotubes\, where it i
 mplies a strong dependence of the friction with the tube length\, that has
  not been explored yet. Finally\, our results suggests that driven phonon 
 excitations opens a way towards frictionless nanofluidic transport.
LOCATION:Moonstone Bldg / Ground floor / Seminar Room F (I24.EG.030f)\, IST
 A
ORGANIZER:cpetz@ist.ac.at
SUMMARY:Adrien Sutter: The LLAMA effect: phonon-induced dynamical lubricity
  in nanoscale liquid flows
URL:https://talks-calendar.ista.ac.at/events/6753
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