Journal Article

PUBDB-2021-01452

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Precursor Film Spreading during Liquid Imbibition in Nanoporous Photonic Crystals

Cencha, L. G. ; Dittrich, G. ; Huber, P.Extern*DESY* ; Berli, C. L. A. ; Urteaga, R. (Corresponding author)

2020
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/PhysRevLett.125.234502  doi:10.3204/PUBDB-2021-01452

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.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. FS-Photon Science (FS-PS)

Research Program(s):

1. 6214 - Nanoscience and Materials for Information Technology (POF3-621) (POF3-621)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2020

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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