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SUMMARY:Angstrom-Scale Fluidic Channels: Molecular Transport
DTSTART:20230317T140000
DTEND:20230317T150000
DTSTAMP:20260415T080902Z
UID:7c1d448d4625325a041e0213e5a641983108dad907c4d073d77da82c
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Radha Boya\, University of Manchester (UK)\nBIOENGINEERI
 NG SEMINAR\n \nAbstract:\nUnderstanding molecular transport in nano/angst
 rom scale channels has practical relevance in applications such as membran
 e desalination\, blue energy\, supercapacitors and batteries\, as well as 
 in understanding ionic flow through biological channels. Synthetic Å-chan
 nels are now a reality with the emergence of several cutting-edge bottom-u
 p and top-down fabrication methods. In particular\, the use of atomically 
 thin 2D-materials and nanotubes as components to build fluidic conduits ha
 s pushed the limits of fabrication to the Å-scale. In this talk\, I will 
 discuss about angstrom (Å)-scale capillaries which are rectangular slit-s
 haped channels and are created by extracting one-atomic layer out of a cry
 stal [1]. The Å-capillary is an antipode of graphene and can be dubbed as
  “2D-nothing”. What is intriguing here is\, the dimensions of the thin
 nest channels being comparable to the size of a water molecule.\nThe Å-ca
 pillaries have helped probe several intriguing molecular-scale phenomena e
 xperimentally\, including: water flow under extreme atomic-scale confineme
 nt [1] complete steric exclusion of ions [3\,5]\, specular reflection and 
 quantum effects in gas reflections off a surface [2\,7]\, voltage gating o
 f ion flows [4] translocation of DNA [6]. I will present ionic flows induc
 ed by stimuli (electric\, pressure\, concentration gradient) and discuss t
 he importance of ionic parameters that are often overlooked in the selecti
 vity between ions [7]\, along with ionic memory effects [8].\n\nAcknowledg
 ements\nI acknowledge the contributions to this work from my collaborators
  and colleagues A.K. Geim\, A. Keerthi\, A. Ismail\, K. Gopinadhan\, A. Es
 fandiar\, S. Goutham\, Y. You\, S. J Haigh\, R.Sajja\, A.Bhardwaj\, G.H-Na
 m from University of Manchester\; L. Bocquet\, P. Robin\, T. Emmerich\, T.
  Mouterde\, A. Poggioli\, A. Siria\, from Micromégas team\, ENS Paris\; m
 y theory collaborators F.C. Wang\, M. Neek-Amal.\n\nReferences:\n[1] B. Ra
 dha et al.\, Molecular transport through capillaries made with atomic-scal
 e precision. Nature 538\, 222 (2016).\n[2] A. Keerthi et al.\, Ballistic m
 olecular transport through two-dimensional channels\, Nature (2018)\, 558\
 , 420.\n[3] A. Esfandiar et al.\, Size effect in ion transport through ang
 strom-scale slits. Science 358\, 511 (2017).\n[4] T. Mouterde et al.\, Mol
 ecular streaming and voltage gated response in Angstrom scale channels. Na
 ture 567\, 87 (2019).\n[5] K. Gopinadhan et al.\, Complete ion exclusion a
 nd proton transport through monolayer water. Science 363\, 145 (2019).\n[6
 ] Y. You\, A.Ismail et al.\, Angstrofluidics: walking to the limit. Annual
  Reviews for Materials Research 52\, 189\, (2022).\n[7] S. Goutham et al.\
 , Beyond steric selectivity of ions using angstrom-scale capillaries\, Nat
 ure Nanotechnology in press (2023)\; arXiv:2212.09584.\n[8] P. Robin et al
 .\, Long-term memory and synapse-like dynamics of ionic carriers in two-di
 mensional nanofluidic channels\, Science (2023) in press\, arXiv:2205.0765
 3.\n\n\nBio:\nProf. Radha Boya FRSC is a Professor\, Royal Society Univers
 ity Research fellow and Kathleen Ollerenshaw fellow at the University of M
 anchester. After completing her PhD in India and a brief post-doctoral sti
 nt in the United States\, she has secured a series of highly prestigious i
 nternational research fellowships that have enabled her to rapidly build h
 er research profile in the United Kingdom. She has published 60 research p
 apers including several of these in Nature and Science journals. Radha was
  awarded an ERC starting grant\, Analytical Chemistry Young Innovator awar
 d\, Philip Leverhulme Prize in Physics\, RSC Marlow award\, UNESCO-L’Or
 éal International Rising Talent\, L’Oréal UK & Ireland women in scienc
 e fellow\, and was recognized as an inventor of MIT Technology Review's gl
 obal "Innovators under 35" list.\n\n\nZoom link for attending remotely: ht
 tps://epfl.zoom.us/j/63480398209
LOCATION:BM 5202 https://plan.epfl.ch/?room==BM%205202 https://epfl.zoom.u
 s/j/63480398209
STATUS:CONFIRMED
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