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ISBN 9783843920940

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978-3-8439-2094-0, Reihe Mikrosystemtechnik

Vitaliy Kondrashov
Novel Silicon and Polymer Nanograss Surfaces - Generation, Wetting Properties and the Prevention of Icing

160 Seiten, Dissertation Albert-Ludwigs-Universität Freiburg im Breisgau (2015), Softcover, B5

Zusammenfassung / Abstract

This work describes methods to generate water-repellent surfaces decorated with silicon and polymer-based "nanograss". The silicon nanograss was fabricated using dry etching processes and the polymeric nanograss was generated from silicon masters using a novel double replication method. The obtained surfaces were subjected to condensation and icing experiments. In conclusion of these experiments a model is developed, which allows a much improved understanding of the nucleation mechanism and origin of an ice formation delay on nanostructured water-repellent surfaces. Finally, a mechanically stable nanograss-based surface with excellent wetting properties was obtained by generating a surface with a hierarchical roughness.