Large-Scale Patterning of Zwitterionic Molecules on a Si(111)-7 × 7 Surface

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• 作者：Mohamed El Garah ; Younes Makoudi ; Éric Duverger ; Frank Palmino ; Alain Rochefort ; Frédéric Chérioux
• 刊名：ACS Nano
• 出版年：2011
• 出版时间：January 25, 2011
• 年：2011
• 卷：5
• 期：1
• 页码：424-428
• 全文大小：338K
• 年卷期：0
• ISSN：1936-086X

文摘

The formation of a large scale pattern on Si(111)-7 × 7 reconstruction is still a challenge. We report herein a new solution to achieve this type of nanostructuration by using of zwitterionic molecules. The formation of a large-scale pattern is successfully obtained due to the perfect match between the molecular geometry and the surface topology and to electrostatic interactions between molecules and surface. The adsorption is described by high-resolution scanning tunneling microscopy (STM) images and supported by density functional theory and STM calculations.