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Effects of liquid surface tension on gas capillaries and capillary forces at superamphiphobic surfaces
RISE Research Institutes of Sweden. KTH Royal Institute of Technology, Sweden.ORCID-id: 0000-0001-8971-3397
KTH Royal Institute of Technology, Sweden.
RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign.ORCID-id: 0000-0002-4746-6559
RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign.ORCID-id: 0000-0003-1634-6789
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2023 (engelsk)Inngår i: Scientific Reports, E-ISSN 2045-2322, Vol. 13, nr 1, artikkel-id 6794Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The formation of a bridging gas capillary between superhydrophobic surfaces in water gives rise to strongly attractive interactions ranging up to several micrometers on separation. However, most liquids used in materials research are oil-based or contain surfactants. Superamphiphobic surfaces repel both water and low-surface-tension liquids. To control the interactions between a superamphiphobic surface and a particle, it needs to be resolved whether and how gas capillaries form in non-polar and low-surface-tension liquids. Such insight will aid advanced functional materials development. Here, we combine laser scanning confocal imaging and colloidal probe atomic force microscopy to elucidate the interaction between a superamphiphobic surface and a hydrophobic microparticle in three liquids with different surface tensions: water (73 mN m−1), ethylene glycol (48 mN m−1) and hexadecane (27 mN m−1). We show that bridging gas capillaries are formed in all three liquids. Force-distance curves between the superamphiphobic surface and the particle reveal strong attractive interactions, where the range and magnitude decrease with liquid surface tension. Comparison of free energy calculations based on the capillary menisci shapes and the force measurements suggest that under our dynamic measurements the gas pressure in the capillary is slightly below ambient. © 2023, The Author(s).

sted, utgiver, år, opplag, sider
Nature Research , 2023. Vol. 13, nr 1, artikkel-id 6794
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Identifikatorer
URN: urn:nbn:se:ri:diva-64423DOI: 10.1038/s41598-023-33875-9Scopus ID: 2-s2.0-85153917455OAI: oai:DiVA.org:ri-64423DiVA, id: diva2:1756581
Merknad

M.E. thanks SSF, the Swedish Foundation for Strategic Research (Grant No. FID15-0029) and Omya International AG for funding. H.T. acknowledges the Alexander von Humboldt Foundation for financial support. D.V. likes to acknowledge financial support via the Priority Programme 2171. A.S. is researcher at Pro2BE at Karlstad University, a research environment for Processes and products for a circular forest-based bioeconomy. M.E. thanks SSF, the Swedish Foundation for Strategic Research (Grant No. FID15-0029) and Omya International AG for funding. H.T. acknowledges the Alexander von Humboldt Foundation for financial support. D.V. likes to acknowledge financial support via the Priority Programme 2171. A.S. is researcher at Pro2BE at Karlstad University, a research environment for Processes and products for a circular forest-based bioeconomy.

Tilgjengelig fra: 2023-05-12 Laget: 2023-05-12 Sist oppdatert: 2023-12-20bibliografisk kontrollert

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