A tunable method for nonwetting surfaces based on nanoimprint lithography and hydrothermal growth

Hak Jong Choi, Ju Hyeon Shin, Soyoung Choo, Jinseung Kim, Heon Lee

    Research output: Contribution to journalArticlepeer-review

    19 Citations (Scopus)

    Abstract

    In nature, some living things exhibit special wettability properties such as superhydrophobicity. Many scientists have tried to mimic these properties for utilizing them in various applications. Especially, surface morphology is as important as the surface energy to create the superhydrophobicity. In this study, we used a hybrid method - a combination of sol-gel-based nanoimprint lithography and hydrothermal growth - to tune the surface morphology. Ten kinds of TiO2 structures were fabricated using this method and their wetting properties for various liquids and evaporation of water were analyzed. In particular, TiO2 nano- and hierarchical structures, which possess superhydrophobicity, were compared on the basis of these measurements. From these analyses, we confirmed that TiO2 hierarchical structures formed the most stable superhydrophobic state, which have the contact angles over 160° for water and the longest time for natural evaporation of water, compared to other ten kinds of TiO2 structures.

    Original languageEnglish
    Pages (from-to)8417-8424
    Number of pages8
    JournalJournal of Materials Chemistry A
    Volume1
    Issue number29
    DOIs
    Publication statusPublished - 2013 Aug 7

    ASJC Scopus subject areas

    • General Chemistry
    • Renewable Energy, Sustainability and the Environment
    • General Materials Science

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