Photoinduced Formation of Wrinkled Microstructures with Long-Range Order in Thin Oxide Films


  • This work was supported by Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), and the Italian Ministero dell'Università e della Ricerca (MiUR) through grants FIRB2003 (RBNEO33KMA). We thank Massimo Piccinini and Mariangela Cestelli Guidi for the support in the infrared experiments. Hiroshi Watanabe is acknowledged for the fruitful discussions. Supporting Information is available online from Wiley InterScience or from the authors.


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Thin oxide films with long-range ordered microstructures were fabricated by a wrinkling process initiated by photopolymerization. The faster polymerization of the film surface generates a buckling effect to create patterns in the films. The removal of the organic polymer by thermal treatment leaves titania microstructures having long-range order. This method of producing micropatterned structures can find several applications in photonics.