Durable Icephobic and Superhydrophobic Silicon Nanowire Surfaces

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Authors

Date

2025-11-26

Department

Department of Chemistry and Materials Science
Department of Applied Physics

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Language

en

Pages

11

Series

ACS Applied Materials and Interfaces, Volume 17, issue 47, pp. 65242-65252

Abstract

Superhydrophobic surfaces hold great promise for various engineering applications. However, their fragility and limited durability in real-world scenarios pose significant challenges. Here, a durable superhydrophobic and icephobic surface is fabricated using the metal-assisted chemical etching method to create silicon nanowires within inverted pyramidal microstructures. Mechanical robustness is introduced by applying a hard coating to the structure through titanium film deposition, followed by annealing in a nitrogen atmosphere, which forms titanium silicide and titanium nitride. The hard-coated surfaces can endure up to 60 g of sand abrasion or 20 icing–shearing cycles while still retaining their superhydrophobic properties (advancing and receding contact angles of approximately 150°) and icephobic properties (ice adhesion strength of approximately 10 kPa).

Description

Publisher Copyright: © 2025 The Authors. Published by American Chemical Society

Keywords

air plastron, hard coating, impact test, indentation, metal-assisted chemical etching, superhydrophobicity

Other note

DOI

10.1021/acsami.5c13616

Citation

Mirmohammadi, S M, Heikkilä, M, Fieber, L, Awashra, M, Hamed, S, Bhusare, S, Mohanty, G, Ras, R H A, Jokinen, V & Franssila, S 2025, 'Durable Icephobic and Superhydrophobic Silicon Nanowire Surfaces', ACS Applied Materials and Interfaces, vol. 17, no. 47, pp. 65242-65252. https://doi.org/10.1021/acsami.5c13616

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https://urn.fi/URN:NBN:fi:aalto-202512109036

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[article-cris] Kemian tekniikan korkeakoulu / CHEM