Molecular assembly of tetracene on the (2 × 1)O reconstructed Cu(1 1 0) surface

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• 作者：Hongying Mao ; Weidong Dou ; Ateeq ur Rehman ; Qing Liao ; Hanjie Zhang ; Haiyang Li ; Pimo He ; Shining Bao
• 关键词：Organic semiconductor ; Scanning tunneling microscopy ; Nanotemplate ; DFT
• 刊名：Applied Surface Science
• 出版年：2010
• 出版时间：15 March 2010
• 年：2010
• 卷：256
• 期：11
• 页码：3598-3602
• 全文大小：630 K

文摘

Using a combination of scanning tunneling microscopy (STM) and density functional theory calculations, we have studied the adsorption of tetracene on the Cu(1 1 0) (2 × 1)O substrate. At monolayer coverage the adsorbed molecules are in the flat-laying geometry with their long axis along the close-packed [0 0 1] direction of the substrate and a long-range ordered structure on the length scale up to 100 nm has been observed. DFT calculation results indicate a stronger interaction between tetracene molecules and Cu(1 1 0) substrate than Cu(1 1 0) (2 × 1)O substrate. The preferential adsorption sites have also been pointed out on both substrates. The observed wavelike structure is explained by the interdigitation of C–H bonds of adjacent molecules.