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Hydrophobic/oleophilic structures based on macroporous silicon: Effect of topography and fluoroalkyl silane functionalization on wettability

  • Datos identificativos

    Identificador: imarina:9173182
    Autores:
    Formentin, PilarMarsal, Lluis F
    Resumen:
    © 2021 by the authors. Licensee MDPI, Basel, Switzerland. The effect of the morphology and chemical composition of a surface on the wettability of porous silicon structures is analyzed in the present work. Hydrophobic and superhydrophobic macroporous substrates are attractive for different potential applications. Herein, different hydropho-bic macroporous silicon structures were fabricated by the chemical etching of p-type silicon wafers in a solution based on hydrofluoric acid and coated with a fluoro silane self-assembled monolayer. The surface morphology of the final substrate was characterized using a scanning electron microscope. The wettability was assessed from contact angle measurements using water and organic solvents that present low surface energy. The experimental data were compared with the classical wetting states theoretical models described in the literature. Perfluoro-silane functionalized macroporous silicon surfaces presented systematically higher contact angles than untreated silicon substrates. The influence of porosity on the surface wettability of macoporous silicon structures has been estab-lished. These results suggest that the combination of etching conditions with a surface chemistry modification could lead to hydrophobic/oleophilic or superhydrophobic/oleophobic structures.
  • Otros:

    Autor según el artículo: Formentin, Pilar; Marsal, Lluis F
    Departamento: Enginyeria Electrònica, Elèctrica i Automàtica
    Autor/es de la URV: Formentín Vallés, Pilar / Marsal Garví, Luis Francisco
    Palabras clave: Wettability Perfluoro-silane Oleophilic Macroporous silicon Hydrophobic Contact angle
    Resumen: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. The effect of the morphology and chemical composition of a surface on the wettability of porous silicon structures is analyzed in the present work. Hydrophobic and superhydrophobic macroporous substrates are attractive for different potential applications. Herein, different hydropho-bic macroporous silicon structures were fabricated by the chemical etching of p-type silicon wafers in a solution based on hydrofluoric acid and coated with a fluoro silane self-assembled monolayer. The surface morphology of the final substrate was characterized using a scanning electron microscope. The wettability was assessed from contact angle measurements using water and organic solvents that present low surface energy. The experimental data were compared with the classical wetting states theoretical models described in the literature. Perfluoro-silane functionalized macroporous silicon surfaces presented systematically higher contact angles than untreated silicon substrates. The influence of porosity on the surface wettability of macoporous silicon structures has been estab-lished. These results suggest that the combination of etching conditions with a surface chemistry modification could lead to hydrophobic/oleophilic or superhydrophobic/oleophobic structures.
    Áreas temáticas: Physics, applied Nanoscience & nanotechnology Materials science, multidisciplinary Materials science (miscellaneous) Materials science (all) General materials science General chemical engineering Engenharias ii Chemistry, multidisciplinary Chemical engineering (miscellaneous) Chemical engineering (all)
    Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
    Direcció de correo del autor: lluis.marsal@urv.cat pilar.formentin@urv.cat pilar.formentin@urv.cat
    Identificador del autor: 0000-0002-5976-1408
    Fecha de alta del registro: 2024-10-12
    Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
    Enlace a la fuente original: https://www.mdpi.com/2079-4991/11/3/670
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referencia al articulo segun fuente origial: Nanomaterials. 11 (3): 1-11
    Referencia de l'ítem segons les normes APA: Formentin, Pilar; Marsal, Lluis F (2021). Hydrophobic/oleophilic structures based on macroporous silicon: Effect of topography and fluoroalkyl silane functionalization on wettability. Nanomaterials, 11(3), 1-11. DOI: 10.3390/nano11030670
    DOI del artículo: 10.3390/nano11030670
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2021
    Tipo de publicación: Journal Publications
  • Palabras clave:

    Chemical Engineering (Miscellaneous),Chemistry, Multidisciplinary,Materials Science (Miscellaneous),Materials Science, Multidisciplinary,Nanoscience & Nanotechnology,Physics, Applied
    Wettability
    Perfluoro-silane
    Oleophilic
    Macroporous silicon
    Hydrophobic
    Contact angle
    Physics, applied
    Nanoscience & nanotechnology
    Materials science, multidisciplinary
    Materials science (miscellaneous)
    Materials science (all)
    General materials science
    General chemical engineering
    Engenharias ii
    Chemistry, multidisciplinary
    Chemical engineering (miscellaneous)
    Chemical engineering (all)
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