Facile One-Step Fabrication of an Undercut Structure by Solution Dewetting on a Water/Ice Mold

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• 作者：Longjian Xue ; Rubo Xing ; Yanchun Han
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：June 3, 2010
• 年：2010
• 卷：114
• 期：21
• 页码：9845-9849
• 全文大小：227K
• 年卷期：v.114,no.21(June 3, 2010)
• ISSN：1932-7455

文摘

This paper reports a facile one-step method for making undercut structures by dewetting of poly(methyl methacrylate) (PMMA) chloroform solution on an ice/water mold. The ice mold is prepared by filling the microchannels with water (micromolding in capillaries (MIMIC) method) and then freezing. The curving surface of water mold stripes and the trapezoidal structure of ice mold stripes work as complementary structures devoted to the formation of undercut structures. The undercut structures with angles of 60° and 40° are obtained, which is determined by the states of ice or water mold. Meanwhile, if the solution concentration is increased, patterned polymer films with different configurations of undercut structures or microchannels would be gained.