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@ARTICLE{Cencha:456316,
author = {Cencha, Luisa G. and Dittrich, Guido and Huber, Patrick and
Berli, Claudio L. A. and Urteaga, Raul},
title = {{P}recursor {F}ilm {S}preading during {L}iquid {I}mbibition
in {N}anoporous {P}hotonic {C}rystals},
journal = {Physical review letters},
volume = {125},
number = {23},
issn = {1079-7114},
address = {College Park, Md.},
publisher = {APS},
reportid = {PUBDB-2021-01452},
pages = {234502},
year = {2020},
abstract = {When a macroscopic droplet spreads, a thin precursor film
of liquid moves ahead of the advancing liquid-solid-vapor
contact line. Whereas this phenomenon has been explored
extensively for planar solid substrates, its presence in
nanostructured geometries has barely been studied so far,
despite its importance for many natural and technological
fluid transport processes. Here we use porous photonic
crystals in silicon to resolve by light interferometry
capillarity-driven spreading of liquid fronts in pores of
few nanometers in radius. Upon spatiotemporal rescaling the
fluid profiles collapse on master curves indicating that all
imbibition fronts follow a square-root-of-time broadening
dynamics. For the simple liquid (glycerol) a sharp front
with a widening typical of Lucas-Washburn capillary-rise
dynamics in a medium with pore-size distribution occurs. By
contrast, for a polymer (PDMS) a precursor film moving ahead
of the main menisci entirely alters the nature of the
nanoscale transport, in agreement with predictions of
computer simulations.},
cin = {DOOR ; HAS-User / FS-PS},
ddc = {530},
cid = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)FS-PS-20131107},
pnm = {6214 - Nanoscience and Materials for Information Technology
(POF3-621)},
pid = {G:(DE-HGF)POF3-6214},
experiment = {EXP:(DE-MLZ)NOSPEC-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:33337190},
UT = {WOS:000595043900011},
doi = {10.1103/PhysRevLett.125.234502},
url = {https://bib-pubdb1.desy.de/record/456316},
}