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VERSION:2.0
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SUMMARY:CECAM Workshop: "Fluids in porous materials: From fundamental phys
 ics to engineering applications"
DTSTART:20230619T133000
DTEND:20230621T163000
DTSTAMP:20260509T191304Z
UID:81c48ef6e8be04180e84a84908beab36ef591ee76c8b369987b70d02
CATEGORIES:Conferences - Seminars
DESCRIPTION:You can apply to participate and find all the relevant informa
 tion (speakers\, abstracts\, program\,...) on the event website: https://
 www.cecam.org/workshop-details/1203\n\nDescription\nLiquid intrusion in n
 anoporous systems (“wetting”) is the process by which the fluid replac
 es the pre-existing vapor/gas phase present in the medium. Extrusion ("d
 rying") is the opposite process. For long time\, the theoretical descript
 ion of intrusion/extrusion has been based on the capillary theory of multi
 phase systems (see\, e.g.\, Ref. [1]). During the last 10-15 years\, some 
 progress has been made developing rigorous statistical mechanics approache
 s describing intrusion/extrusion as a rare event (see\, e.g.\, [2]). Among
  other advancements\, this led to the discovery of unconventional wetting 
 paths of cavities that could explain some experimental results\, but also 
 highlighted mismatches with the empirical evidence [3]. This suggested tha
 t the quasi-static description of the intrusion/extrusion process one obta
 ins with well-established simulation techniques may be insufficient [4]. M
 oreover\, novel (sub)nanoporous materials attracted the interest of experi
 mentalists\, adding significant theoretical challenges: i) they cannot be 
 described by continuum models\, ii)  are highly flexible\, iii) might cha
 nge configuration during the process (e.g.\, biological channels)\, iv) pr
 esent shallow interconnected pores defeating classical Cassie-Baxter/Wenze
 l behavior\, v) present an unusually low intrusion pressure\, etc. Related
  problems and challenges are also encountered in the processes of solvent 
 evaporation from nanoporous materials.\nNanoporous materials immersed in l
 iquids are promising for their potential applicability to develop novel te
 chnologies. In some cases intrusion/extrusion may be accompanied by other 
 phenomena\, such as triboelectrification and heat flow\, which call for a 
 comprehensive description of these processes and make them potentially usa
 ble to scavenge low-grade energy available in the environment. The peculia
 r behavior of water in nanopores is central also for several phenomena of 
 biomedical interest\, including selectivity\, conduction\, and gating mech
 anisms of ion channels [1]\, which can serves as a source of inspiration f
 or technologies for water purification\, nanopore sensing\, nanofluidic ci
 rcuits\, and drug delivery. Understanding the physical origin of these pro
 perties and developing quantitative tools to engineer them is the key for 
 the progress of nanopore-based technologies.\nUnderstanding intrusion/extr
 usion/evaporation in system with complex chemistry and topology\, and thei
 r combination with other phenomena is still in its infancy. The objective 
 of this workshop is to gather experimentalists and theoreticians to discus
 s fundamental and technological aspects of these processes\, including:\n\
 n	Fundamental questions on the intrusion/extrusion/evaporation mechanism\,
  energetics\, and kinetics in complex porous systems: disordered grafted p
 orous systems\, metal- or covalent-organic framework\, porous polymeric ma
 terials [5]\, soft porous media – biological channels. This includes\, f
 or example\, how liquid penetrates in porous materials - e.g.\, via conden
 sation or via a cascade advancement? – and its dependence on the morphol
 ogical characteristics of the porous media – e.g.\, cage-like vs channel
 -like systems – and their chemical nature – e.g.\, hydrogen bonding wi
 th some atoms of the material.\n	Challenges in the simulation of intrusion
 /extrusion/evaporation: quasi-static (e.g.\, string method) vs “dynamica
 l” methods (e.g.\, transition interface sampling)\, and multiscale aspec
 ts in time and space in general.\n	Challenges in the experimental investig
 ation of intrusion/extrusion/evaporation: in situ structural measureme
 nts\, heat flux\, charging/discharging of the liquid/solid interface\, ion
 ic conduction across nanopores\, stability of ultrathin liquid films.\n	Id
 entify possible novel technological applications of these systems and esta
 blishing collaborations among the participants to tackle them.\n\nReferenc
 e\n[1] N. Patankar\, Langmuir\, 20\, 7097-7102 (2004)\n[2] A. Le Donne\, 
 A. Tinti\, E. Amayuelas\, H. Kashyap\, G. Camisasca\, R. Remsing\, R. Roth
 \, Y. Grosu\, S. Meloni\, Advances in Physics: X\, 7\, (2022)\n[3] P. Lv\
 , Y. Xue\, H. Liu\, Y. Shi\, P. Xi\, H. Lin\, H. Duan\, Langmuir\, 31\, 1
 248-1254 (2015)\n[4] S. Marchio\, S. Meloni\, A. Giacomello\, C. Casciola\
 , Nanoscale\, 11\, 21458-21470 (2019)\n[5] D. Wu\, F. Xu\, B. Sun\, R. Fu
 \, H. He\, K. Matyjaszewski\, Chem. Rev.\, 112\, 3959-4015 (2012)
LOCATION:BCH 2103 https://plan.epfl.ch/?room==BCH%202103
STATUS:CONFIRMED
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