---
OA_place: repository
OA_type: green
_id: '21273'
abstract:
- lang: eng
text: In this paper we examine how porosity fluctuations affect the hydrodynamic
permeability of a porous matrix or membrane. We introduce a fluctuating Darcy
model, which couples the Navier-Stokes equation to the space- and time-dependent
porosity fluctuations via a Darcy friction term. Using a perturbative approach,
a Dyson equation for hydrodynamic fluctuations is derived and solved to express
the permeability in terms of the matrix fluctuation spectrum. Surprisingly, the
model reveals strong modifications of the fluid permeability in fluctuating matrices
compared to static ones. Applications to various matrix excitation models, the
breathing matrix, phonons, and active forcing, highlight the significant influence
of matrix fluctuations on fluid transport, offering insights for optimizing membrane
design for separation applications.
acknowledgement: "The authors acknowledge support from ERC project n-AQUA, Grant Agreement
No. 101071937.\r\nB.C. and A.S. acknowledge support from the CFM Foundation. B.C.
acknowledges support from\r\nthe NOMIS Foundation."
article_number: '014201'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Albert
full_name: Dombret, Albert
last_name: Dombret
- first_name: Adrien
full_name: Sutter, Adrien
last_name: Sutter
- first_name: Baptiste
full_name: Coquinot, Baptiste
id: f8417bd4-f599-11ee-a482-b927e3ed1e8e
last_name: Coquinot
orcid: 0000-0001-5524-596X
- first_name: Nikita
full_name: Kavokine, Nikita
last_name: Kavokine
- first_name: Benoit
full_name: Coasne, Benoit
last_name: Coasne
- first_name: Lydéric
full_name: Bocquet, Lydéric
last_name: Bocquet
citation:
ama: Dombret A, Sutter A, Coquinot B, Kavokine N, Coasne B, Bocquet L. Hydrodynamic
permeability of fluctuating porous membranes. Physical Review Fluids. 2026;11(1).
doi:10.1103/m8h6-1wfk
apa: Dombret, A., Sutter, A., Coquinot, B., Kavokine, N., Coasne, B., & Bocquet,
L. (2026). Hydrodynamic permeability of fluctuating porous membranes. Physical
Review Fluids. American Physical Society. https://doi.org/10.1103/m8h6-1wfk
chicago: Dombret, Albert, Adrien Sutter, Baptiste Coquinot, Nikita Kavokine, Benoit
Coasne, and Lydéric Bocquet. “Hydrodynamic Permeability of Fluctuating Porous
Membranes.” Physical Review Fluids. American Physical Society, 2026. https://doi.org/10.1103/m8h6-1wfk.
ieee: A. Dombret, A. Sutter, B. Coquinot, N. Kavokine, B. Coasne, and L. Bocquet,
“Hydrodynamic permeability of fluctuating porous membranes,” Physical Review
Fluids, vol. 11, no. 1. American Physical Society, 2026.
ista: Dombret A, Sutter A, Coquinot B, Kavokine N, Coasne B, Bocquet L. 2026. Hydrodynamic
permeability of fluctuating porous membranes. Physical Review Fluids. 11(1), 014201.
mla: Dombret, Albert, et al. “Hydrodynamic Permeability of Fluctuating Porous Membranes.”
Physical Review Fluids, vol. 11, no. 1, 014201, American Physical Society,
2026, doi:10.1103/m8h6-1wfk.
short: A. Dombret, A. Sutter, B. Coquinot, N. Kavokine, B. Coasne, L. Bocquet, Physical
Review Fluids 11 (2026).
corr_author: '1'
date_created: 2026-02-17T08:10:09Z
date_published: 2026-01-21T00:00:00Z
date_updated: 2026-02-23T12:01:57Z
day: '21'
department:
- _id: MiLe
doi: 10.1103/m8h6-1wfk
external_id:
arxiv:
- '2512.11368'
intvolume: ' 11'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2512.11368
month: '01'
oa: 1
oa_version: Preprint
publication: Physical Review Fluids
publication_identifier:
eissn:
- 2469-990X
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
status: public
title: Hydrodynamic permeability of fluctuating porous membranes
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 11
year: '2026'
...
---
OA_place: publisher
OA_type: hybrid
PlanS_conform: '1'
_id: '21840'
abstract:
- lang: eng
text: The transport properties of nanofluidic channels are usually studied under
constant (DC) voltage or pressure driving. However, the frequency response under
sinusoidal (AC) drivings offers rich insights into the time-dependent transport
mechanisms. Inspired by recent electrochemical approaches, we investigate the
couplings between ionic and electronic transport under AC driving. We show that
conduction electrons of the channel walls participate in ionic current via capacitive
electrochemical coupling, defining a critical frequency and length scale where
electron-dominated conductivity emerges. We further analyze how electron–ion coupling
modifies electro-osmotic flows and demonstrate that fluctuation-induced momentum
transfer between the electrolyte and wall electrons produces distinct AC transport
signatures, depending on the charge carrier polarity. Altogether, we establish
a frequency-dependent transport matrix that couples ionic, electronic, and hydrodynamic
flows. These findings establish AC nanofluidic transport as a powerful probe of
interfacial phenomena under confinement and suggest new directions for engineering
nanofluidic functionalities through electron–electrolyte coupling.
acknowledgement: The authors thank Nicolas Chapuis for fruitful discussions. L.B.
acknowledges support from the ERC project n-AQUA under Grant Agreement No. 101071937.
B.C. acknowledges support from the CFM Foundation and the NOMIS Foundation. N.K.
acknowledges support from the Swiss National Science Foundation (SNSF) under Grant
No. CRSK-2_237930.
article_number: '134704'
article_processing_charge: Yes (in subscription journal)
article_type: original
arxiv: 1
author:
- first_name: Baptiste
full_name: Coquinot, Baptiste
id: f8417bd4-f599-11ee-a482-b927e3ed1e8e
last_name: Coquinot
orcid: 0000-0001-5524-596X
- first_name: Mathieu
full_name: Lizée, Mathieu
last_name: Lizée
- first_name: Lydéric
full_name: Bocquet, Lydéric
last_name: Bocquet
- first_name: Nikita
full_name: Kavokine, Nikita
last_name: Kavokine
citation:
ama: Coquinot B, Lizée M, Bocquet L, Kavokine N. Electron–electrolyte coupling in
AC transport through nanofluidic channels. The Journal of Chemical Physics.
2026;164(13). doi:10.1063/5.0313352
apa: Coquinot, B., Lizée, M., Bocquet, L., & Kavokine, N. (2026). Electron–electrolyte
coupling in AC transport through nanofluidic channels. The Journal of Chemical
Physics. AIP Publishing. https://doi.org/10.1063/5.0313352
chicago: Coquinot, Baptiste, Mathieu Lizée, Lydéric Bocquet, and Nikita Kavokine.
“Electron–Electrolyte Coupling in AC Transport through Nanofluidic Channels.”
The Journal of Chemical Physics. AIP Publishing, 2026. https://doi.org/10.1063/5.0313352.
ieee: B. Coquinot, M. Lizée, L. Bocquet, and N. Kavokine, “Electron–electrolyte
coupling in AC transport through nanofluidic channels,” The Journal of Chemical
Physics, vol. 164, no. 13. AIP Publishing, 2026.
ista: Coquinot B, Lizée M, Bocquet L, Kavokine N. 2026. Electron–electrolyte coupling
in AC transport through nanofluidic channels. The Journal of Chemical Physics.
164(13), 134704.
mla: Coquinot, Baptiste, et al. “Electron–Electrolyte Coupling in AC Transport through
Nanofluidic Channels.” The Journal of Chemical Physics, vol. 164, no. 13,
134704, AIP Publishing, 2026, doi:10.1063/5.0313352.
short: B. Coquinot, M. Lizée, L. Bocquet, N. Kavokine, The Journal of Chemical Physics
164 (2026).
date_created: 2026-05-07T08:53:03Z
date_published: 2026-04-07T00:00:00Z
date_updated: 2026-05-18T07:34:57Z
day: '07'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1063/5.0313352
external_id:
arxiv:
- '2505.02478'
file:
- access_level: open_access
checksum: a896969c829be2a79859bd277f87b44c
content_type: application/pdf
creator: dernst
date_created: 2026-05-18T07:31:23Z
date_updated: 2026-05-18T07:31:23Z
file_id: '21889'
file_name: 2026_JourChemPhysics_Coquinot.pdf
file_size: 5497515
relation: main_file
success: 1
file_date_updated: 2026-05-18T07:31:23Z
has_accepted_license: '1'
intvolume: ' 164'
issue: '13'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
publication: The Journal of Chemical Physics
publication_identifier:
eissn:
- 1089-7690
issn:
- 0021-9606
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: Electron–electrolyte coupling in AC transport through nanofluidic channels
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 164
year: '2026'
...
---
OA_place: publisher
OA_type: hybrid
PlanS_conform: '1'
_id: '22145'
abstract:
- lang: eng
text: An in-operando electro-intercalation method for the on-chip synthesis of alkali-metal-intercalated
materials and their Raman spectroscopic and transport characterization in ultrahigh
vacuum (UHV) is developed. We apply this method to synthesize fulleride superconductors
via Rb+ intercalation into a C60 film. During the intercalation, we monitor the
stoichiometry via UHV-Raman spectroscopy and probe superconductivity via transport
measurements. An increase of the superconducting transition temperature from 7.0
K to 14.5 K is observed when the stoichiometry is tuned from Rb2.7C60 to Rb3C60.
In our experiment, an ionic Rb+ flux into the host material is induced by an applied
electronic current via a Butler–Volmer-type mechanism. Electro-intercalation captivates
through improved stoichiometric precision, the ability to smoothly vary stoichiometry
via duration of current application, and the absence of a lower limit of the volume
of the host material. It represents a powerful concept for the on-chip synthesis
of intercalated materials, battery research, and beyond.
acknowledgement: 'A.G. and K.P.S. acknowledge the DFG through CRC 1238 (277146847,
A01) and DFG project SE 2575. K.P.S., P.S., and A.G. would like to thank the Center
for Micro- and Nanostructures (ZMNS) for providing the cleanroom facilities. K.P.S.
thanks Daniele Nazari for help with ALD of Al2O3 films. Financial support from FFG
Austria (CrystalGate) is acknowledged. A.G. thanks John Weaver for discussions about
the structure of RbxC60. B.C. acknowledges support from the NOMIS Foundation. First-principles
simulations were supported as part of user project CNMS2025-R-03182 at the Center
for Nanophase Materials Sciences (CNMS), which is a US Department of Energy, Office
of Science User Facility at Oak Ridge National Laboratory. J.J. and J.H. acknowledge
the computational resources provided by the ACCESS (Advanced Cyberinfrastructure
Coordination Ecosystem: Services & Support) program through allocation TG-DMR110037;
the National Energy Research Scientific Computing Center (NERSC), a DOE Office of
Science User Facility supported under Contract No. DE-AC02-05CH11231, through NERSC
award BES-ERCAP0031261; and the Compute and Data Environment for Science (CADES)
Baseline at Oak Ridge National Laboratory, supported by the Office of Science of
the U.S. Department of Energy under Contract No. DE-AC05-00OR22725. The authors
acknowledge TU Wien Bibliothek for financial support through its Open access funding
provided by Technische Universitat Wien.'
article_processing_charge: Yes (via OA deal)
article_type: original
author:
- first_name: Konstantin P.
full_name: Shchukin, Konstantin P.
last_name: Shchukin
- first_name: Oliver N.
full_name: Gallego Lacey, Oliver N.
last_name: Gallego Lacey
- first_name: Baptiste
full_name: Coquinot, Baptiste
id: f8417bd4-f599-11ee-a482-b927e3ed1e8e
last_name: Coquinot
orcid: 0000-0001-5524-596X
- first_name: Jacek
full_name: Jakowski, Jacek
last_name: Jakowski
- first_name: Jingsong
full_name: Huang, Jingsong
last_name: Huang
- first_name: Patrik
full_name: Staudenmayer, Patrik
last_name: Staudenmayer
- first_name: Yannic
full_name: Falke, Yannic
last_name: Falke
- first_name: Ram Prakash
full_name: Pandeya, Ram Prakash
last_name: Pandeya
- first_name: Alexander
full_name: Grüneis, Alexander
last_name: Grüneis
citation:
ama: Shchukin KP, Gallego Lacey ON, Coquinot B, et al. On-chip tuning of superconductivity
in fullerides via current-driven Rb+ intercalation. ACS Nano. 2026;20(24):17360-17372.
doi:10.1021/acsnano.6c02466
apa: Shchukin, K. P., Gallego Lacey, O. N., Coquinot, B., Jakowski, J., Huang, J.,
Staudenmayer, P., … Grüneis, A. (2026). On-chip tuning of superconductivity in
fullerides via current-driven Rb+ intercalation. ACS Nano. American Chemical
Society. https://doi.org/10.1021/acsnano.6c02466
chicago: Shchukin, Konstantin P., Oliver N. Gallego Lacey, Baptiste Coquinot, Jacek
Jakowski, Jingsong Huang, Patrik Staudenmayer, Yannic Falke, Ram Prakash Pandeya,
and Alexander Grüneis. “On-Chip Tuning of Superconductivity in Fullerides via
Current-Driven Rb+ Intercalation.” ACS Nano. American Chemical Society,
2026. https://doi.org/10.1021/acsnano.6c02466.
ieee: K. P. Shchukin et al., “On-chip tuning of superconductivity in fullerides
via current-driven Rb+ intercalation,” ACS Nano, vol. 20, no. 24. American
Chemical Society, pp. 17360–17372, 2026.
ista: Shchukin KP, Gallego Lacey ON, Coquinot B, Jakowski J, Huang J, Staudenmayer
P, Falke Y, Pandeya RP, Grüneis A. 2026. On-chip tuning of superconductivity in
fullerides via current-driven Rb+ intercalation. ACS Nano. 20(24), 17360–17372.
mla: Shchukin, Konstantin P., et al. “On-Chip Tuning of Superconductivity in Fullerides
via Current-Driven Rb+ Intercalation.” ACS Nano, vol. 20, no. 24, American
Chemical Society, 2026, pp. 17360–72, doi:10.1021/acsnano.6c02466.
short: K.P. Shchukin, O.N. Gallego Lacey, B. Coquinot, J. Jakowski, J. Huang, P.
Staudenmayer, Y. Falke, R.P. Pandeya, A. Grüneis, ACS Nano 20 (2026) 17360–17372.
das_tickbox: '0'
date_created: 2026-06-28T22:01:34Z
date_published: 2026-06-23T00:00:00Z
date_updated: 2026-06-29T09:00:33Z
day: '23'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1021/acsnano.6c02466
external_id:
pmid:
- '42260723'
file:
- access_level: open_access
checksum: 01ec8ee6fab7bf563df7af13f6b43045
content_type: application/pdf
creator: dernst
date_created: 2026-06-29T08:58:12Z
date_updated: 2026-06-29T08:58:12Z
file_id: '22150'
file_name: 2026_ACSNano_Shchukin.pdf
file_size: 6290296
relation: main_file
success: 1
file_date_updated: 2026-06-29T08:58:12Z
has_accepted_license: '1'
intvolume: ' 20'
issue: '24'
keyword:
- fulleride
- intercalation
- alkali metal
- superconductivity
- Raman
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
page: 17360-17372
pmid: 1
publication: ACS Nano
publication_identifier:
eissn:
- 1936-086X
issn:
- 1936-0851
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: yes
title: On-chip tuning of superconductivity in fullerides via current-driven Rb+ intercalation
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 20
year: '2026'
...