Polymer-on-Polymer Stamping: Universal Approaches to Chemically Patterned Surfaces

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• 作者：Xueping Jiang ; Haipeng Zheng ; Shoshana Gourdin ; and Paula T. Hammond
• 刊名：Langmuir
• 出版年：2002
• 出版时间：April 2, 2002
• 年：2002
• 卷：18
• 期：7
• 页码：2607 - 2615
• 全文大小：750K
• 年卷期：v.18,no.7(April 2, 2002)
• ISSN：1520-5827

文摘

A new approach to create chemically patterned surfaces utilizing polymers and copolymers is introduced.In this approach, chemical patterns are achieved by the direct stamping of functional polymers onto asurface containing complementary functional groups. The resulting pattern is then used as a template forthe further deposition of materials on the surface. This concept can be applied to various functional polymerand substrate systems as well as different thin film deposition techniques. This approach is demonstratedwith the direct stamping of polystyrene-poly(acrylic acid) block copolymers (PS-PAA) to create alternatinghydrophobic/hydrophilic regions and polyelectrolytes to create alternating positively and negatively chargedregions. This approach has been used for patterning surfaces and templating materials deposition. Whena patterned polyelectrolyte film is used as the base layer or substrate in this process, functionality canbe incorporated in the underlying layer, making this approach particularly relevant to device and sensorapplications. This approach is universal to a number of substrates, many of which can be used to adsorba polyelectrolyte layer to provide a functional surface. Various substrates such as Si, glass, and plasticcan be patterned with this method with relative ease, and without the need for traditional alkanethiol orsilane monolayers. Factors such as stamping temperature, contact time, and substrate pretreatment onthe nature of the transferred pattern have been investigated and will be discussed.