Autor según el artículo: Formentín P; Marsal LF

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: pilar.formentin@urv.cat pilar.formentin@urv.cat lluis.marsal@urv.cat

Identificador del autor: 0000-0002-5976-1408

Fecha de alta del registro: 2023-02-19

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: http://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: Formentín P; Marsal LF (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