An Approach to Fabrication of Metal Nanoring Arrays

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• 作者：Maryam Bayati ; Piotr Patoka ; Michael Giersig ; Elena R. Savinova
• 刊名：Langmuir
• 出版年：2010
• 出版时间：March 2, 2010
• 年：2010
• 卷：26
• 期：5
• 页码：3549-3554
• 全文大小：1001K
• 年卷期：v.26,no.5(March 2, 2010)
• ISSN：1520-5827

文摘

Fabrication of tailored nanomaterials with desired structure and properties is the greatest challenge of modern nanotechnology. Herein, we describe a wet chemical method for the preparation of large area metal nanoring arrays. This method is based on self-assembly of polystyrene sphere template on a flat substrate and wicking/reducing metal precursor into the interstices between the template and the substrate. In this article, platinum, gold, and copper nanorings were fabricated by applying 505 nm polystyrene spheres onto highly oriented pyrolytic graphite (HOPG) and Si(100) substrates, followed by reducing the templated metal salt with NaBH₄. AFM images reveal formation of arrays of metal nanorings comprising metal nanoparticles with the average ring height of 5.7 ± 0.8 nm and diameter of 167.3 ± 8.9 nm. XPS confirms that these structures are metallic.