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UID:68511fdc52a49948339117@ist.ac.at
DTSTART:20250710T110000
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DESCRIPTION:Speaker: Mathieu Lizée\nhosted by Baptiste Coquinot\nAbstract:
  Van-der Waals friction of liquids on solid surfaces involves the matching
  of liquid and solid dynamical modes. In a recent work\, we used glycerols
  glassy nature to tune the liquids molecular frequency over several decade
 s. Using a custom tuning-fork AFM\, we probed the friction of supercooled 
 glycerol on mica across a range of temperatures [1]. We observe a 100-fold
  increase in slip length upon cooling\, and demonstrate that friction scal
 es linearly with the liquid's relaxation rate at high temperature. This sc
 aling reveals a resonant coupling between substrate phonons and liquid den
 sity fluctuations\, suggesting that phononic engineering could be a powerf
 ul strategy to control flow resistance in nanoscale systems.Building on th
 e idea to use glassy liquids in nanofluidics\, I will further discuss the 
 effects of dimensionality on glass transition [2]. Here\, we confine a sin
 gle monolayer of glycerol within atomically smooth\, 7-thick 2D channels b
 uilt from graphite\, realizing the first bidimensional molecular glass for
 mer. Through temperature-dependent ionic conductivity measurements\, we fi
 nd very surprisingly that glycerol remains cooperative in 2D in a striking
  similarity with the 3D behavior. Molecular dynamics simulations confirm t
 his picture and even\, suggest that confinement alone can amplify glassy c
 orrelations rather than suppress them.Together\, these two approaches unve
 il the impressive conceptual wealth of glassy nanofluidics. This emerging 
 framework opens new avenues for tuning interfacial transport and kinetics 
 in biological and catalytic systems\, especially as glassy liquids are alr
 eady widespread in nature and industry.[1] Lize\, M.\, Coquinot\, B.\, Mar
 iette\, G.\, Siria\, A.\, & Bocquet\, L. (2024). Anomalous friction of sup
 ercooled glycerol on mica. Nature Communications\, 15(1)\, 6129.[2] Not pu
 blished yet
LOCATION:Sunstone Bldg / Ground floor / Big Seminar Room B / 63 seats (I23.
 EG.102)\, ISTA
ORGANIZER:cpetz@ist.ac.at
SUMMARY:Mathieu Lizée: Glassy Nanofluidics: How collective liquid dynamics
  shape interfacial transport
URL:https://talks-calendar.ista.ac.at/events/5896
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