Template-Assisted Formation of Gradient Concentric Gold Rings

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• 作者：Suck Won Hong ; Jun Xu ; Zhiqun Lin
• 刊名：Nano Letters
• 出版年：2006
• 出版时间：December 2006
• 年：2006
• 卷：6
• 期：12
• 页码：2949 - 2954
• 全文大小：522K
• 年卷期：v.6,no.12(December 2006)
• ISSN：1530-6992

文摘

Gradient concentric rings of polymers, including (poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) and poly(methylmethacrylate) (PMMA), with unprecedented regularity were formed by repeated "stick-slip" motion of the contact line in a sphere-on-flatgeometry. Subsequently, polymer rings served as templates to direct the formation of concentric Au rings. Three methods were described.The first two methods made use of either UV (i.e., on MEH-PPV) or thermal treatment (i.e., on PMMA) on Au-sputtered polymer rings, followedby ultrasonication. The last method, however, was much more simple and robust, involving selective removal of Au and polymer (i.e., PMMA)consecutively.