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Dynamic wetting properties of PDMS pseudo-brushes: Four-phase contact point dynamics case

Rostami, Peyman ; Hormozi, Mohammad Ali ; Soltwedel, Olaf ; Azizmalayeri, Reza ; Klitzing, Regine von ; Auernhammer, Günter K. (2024)
Dynamic wetting properties of PDMS pseudo-brushes: Four-phase contact point dynamics case.
In: The Journal of Chemical Physics, 2023, 158 (19)
doi: 10.26083/tuprints-00026515
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Dynamic wetting properties of PDMS pseudo-brushes: Four-phase contact point dynamics case
Language: English
Date: 5 February 2024
Place of Publication: Darmstadt
Year of primary publication: 2023
Place of primary publication: Melville, NY
Publisher: AIP Publishing
Journal or Publication Title: The Journal of Chemical Physics
Volume of the journal: 158
Issue Number: 19
Collation: 9 Seiten
DOI: 10.26083/tuprints-00026515
Corresponding Links:
Origin: Secondary publication service
Abstract:

We investigate the wetting properties of PDMS (Polydimethylsiloxane) pseudo-brush anchored on glass substrates. These PDMS pseudobrushes exhibit a significantly lower contact angle hysteresis compared to hydrophobic silanized substrates. The effect of different molar masses of the used PDMS on the wetting properties seems negligible. The surface roughness and thickness of the PDMS pseudo-brush are measured by atomic force microscopy and x-ray reflectivity. The outcome shows that these surfaces are extremely smooth (topologically and chemically), which explains the reduction in contact angle hysteresis. These special features make this kind of surfaces very useful for wetting experiments. Here, the dynamics of the four-phase contact point are studied on these surfaces. The four-phase contact point dynamics on PDMS pseudo-brushes deviate substantially from its dynamics on other substrates. These changes depend only a little on the molar mass of the used PDMS. In general, PDMS pseudo-brushes increase the traveling speed of four-phase contact point on the surface and change the associated power law of position vs time.

Identification Number: Artikel-ID: 194703
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-265153
Classification DDC: 500 Science and mathematics > 530 Physics
500 Science and mathematics > 540 Chemistry
Divisions: 05 Department of Physics > Institute for Condensed Matter Physics > Soft Matter at Interfaces (SMI)
Date Deposited: 05 Feb 2024 12:17
Last Modified: 09 Feb 2024 07:34
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/26515
PPN: 515356468
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