Rational design of static wetting on roughness-engineered heterogeneous surfaces

Surface roughness and chemical composition are crucial in controlling the static wetting properties of surfaces. Here, conventional surface structuring methods used in Si microfabrication are used as a reference to analyze the impact of precisely engineered surface roughness. The static wettability...

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Detalles Bibliográficos
Autores: Martí Balaguer, Gerard|||0000-0002-5888-6671, Serra-Peralta, Marc|||0000-0002-8000-8701, Rius, Gemma|||0000-0003-0552-1043
Tipo de recurso: artículo
Fecha de publicación:2024
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:310295
Acceso en línea:https://ddd.uab.cat/record/310295
https://dx.doi.org/urn:doi:10.1063/5.0237554
Access Level:acceso abierto
Palabra clave:Microfabrication
Etching
Photolithography
Finite-element analysis
Liquid solid interfaces
Hydrophobic effect
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spelling Rational design of static wetting on roughness-engineered heterogeneous surfacesMartí Balaguer, Gerard|||0000-0002-5888-6671Serra-Peralta, Marc|||0000-0002-8000-8701Rius, Gemma|||0000-0003-0552-1043MicrofabricationEtchingPhotolithographyFinite-element analysisLiquid solid interfacesHydrophobic effectSurface roughness and chemical composition are crucial in controlling the static wetting properties of surfaces. Here, conventional surface structuring methods used in Si microfabrication are used as a reference to analyze the impact of precisely engineered surface roughness. The static wettability of rough chemically heterogeneous surfaces is experimentally studied through contact angle measurements and compared against computational simulations to categorize the wetting behavior of water droplets. Heterogeneous samples are observed to already show significant dependence on the surface fraction covered by each material. Furthermore, owing to the presence of a resist layer on top of the Si pillars, intermediate states between the Wenzel (W) and Cassie-Baxter (CB) models are observed. Consistent with these models, we find that local chemical modifications of microstructured surfaces are crucial for controlling their surface wettability properties. Additionally, a comparison of equivalent microstructures made of Si or polydimethylsiloxane (PDMS) reveals the quantitative impact of the hydrophilic/hydrophobic nature of the material on the evolution of the wetting properties with increasing roughness factors. While Si surfaces behave according to the W model, PDMS surfaces show intermediate wetting states at significantly lower roughness levels. Bubbles trapped beneath water droplets demonstrate the existence of intermediate states that cannot be defined by either the W or CB models. By combining experimental results with finite element simulations, we not only demonstrate wettability control through specific roughness and chemical modifications but also provide insight into how these parameters interact to accurately predict and adjust static wetting properties. 22024-01-0120242024-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/310295https://dx.doi.org/urn:doi:10.1063/5.0237554reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengAgencia Estatal de Investigación https://doi.org/10.13039/501100011033 RyC-2026-21412Agencia Estatal de Investigación https://doi.org/10.13039/501100011033 CEX2023-001397-MAgencia Estatal de Investigación https://doi.org/10.13039/501100011033 FPU019/04322open accesshttp://purl.org/coar/access_right/c_abf2Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:3102952026-06-06T12:50:31Z
dc.title.none.fl_str_mv Rational design of static wetting on roughness-engineered heterogeneous surfaces
title Rational design of static wetting on roughness-engineered heterogeneous surfaces
spellingShingle Rational design of static wetting on roughness-engineered heterogeneous surfaces
Martí Balaguer, Gerard|||0000-0002-5888-6671
Microfabrication
Etching
Photolithography
Finite-element analysis
Liquid solid interfaces
Hydrophobic effect
title_short Rational design of static wetting on roughness-engineered heterogeneous surfaces
title_full Rational design of static wetting on roughness-engineered heterogeneous surfaces
title_fullStr Rational design of static wetting on roughness-engineered heterogeneous surfaces
title_full_unstemmed Rational design of static wetting on roughness-engineered heterogeneous surfaces
title_sort Rational design of static wetting on roughness-engineered heterogeneous surfaces
dc.creator.none.fl_str_mv Martí Balaguer, Gerard|||0000-0002-5888-6671
Serra-Peralta, Marc|||0000-0002-8000-8701
Rius, Gemma|||0000-0003-0552-1043
author Martí Balaguer, Gerard|||0000-0002-5888-6671
author_facet Martí Balaguer, Gerard|||0000-0002-5888-6671
Serra-Peralta, Marc|||0000-0002-8000-8701
Rius, Gemma|||0000-0003-0552-1043
author_role author
author2 Serra-Peralta, Marc|||0000-0002-8000-8701
Rius, Gemma|||0000-0003-0552-1043
author2_role author
author
dc.subject.none.fl_str_mv Microfabrication
Etching
Photolithography
Finite-element analysis
Liquid solid interfaces
Hydrophobic effect
topic Microfabrication
Etching
Photolithography
Finite-element analysis
Liquid solid interfaces
Hydrophobic effect
description Surface roughness and chemical composition are crucial in controlling the static wetting properties of surfaces. Here, conventional surface structuring methods used in Si microfabrication are used as a reference to analyze the impact of precisely engineered surface roughness. The static wettability of rough chemically heterogeneous surfaces is experimentally studied through contact angle measurements and compared against computational simulations to categorize the wetting behavior of water droplets. Heterogeneous samples are observed to already show significant dependence on the surface fraction covered by each material. Furthermore, owing to the presence of a resist layer on top of the Si pillars, intermediate states between the Wenzel (W) and Cassie-Baxter (CB) models are observed. Consistent with these models, we find that local chemical modifications of microstructured surfaces are crucial for controlling their surface wettability properties. Additionally, a comparison of equivalent microstructures made of Si or polydimethylsiloxane (PDMS) reveals the quantitative impact of the hydrophilic/hydrophobic nature of the material on the evolution of the wetting properties with increasing roughness factors. While Si surfaces behave according to the W model, PDMS surfaces show intermediate wetting states at significantly lower roughness levels. Bubbles trapped beneath water droplets demonstrate the existence of intermediate states that cannot be defined by either the W or CB models. By combining experimental results with finite element simulations, we not only demonstrate wettability control through specific roughness and chemical modifications but also provide insight into how these parameters interact to accurately predict and adjust static wetting properties.
publishDate 2024
dc.date.none.fl_str_mv 2
2024-01-01
2024
2024-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/310295
https://dx.doi.org/urn:doi:10.1063/5.0237554
url https://ddd.uab.cat/record/310295
https://dx.doi.org/urn:doi:10.1063/5.0237554
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Agencia Estatal de Investigación https://doi.org/10.13039/501100011033 RyC-2026-21412
Agencia Estatal de Investigación https://doi.org/10.13039/501100011033 CEX2023-001397-M
Agencia Estatal de Investigación https://doi.org/10.13039/501100011033 FPU019/04322
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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