Using scanning tunneling microscopy (STM) together with density functional theory (DFT) the growth behavior of perylene on the Cu(100) substrate has been investigated. As revealed by STM images, perylene molecules prefer to adopt lying configuration with their molecular plane parallel to the substrate, and two symmetrically equivalent ordered domains were observed. DFT calculations show that perylene molecule prefers to adsorb on the top site of substrate Cu atoms with its long molecular axis aligning along the [011] or [01–1] azimuth of the substrate which is the most stable adsorption geometry according to its highest binding energy. Consequently, two adsorption structures of c(8×4) and c(8×6), each containing two perylene molecules per unit cell, are proposed based on our STM images. The growth mechanism for ordered perylene domains on Cu(100) can be attributed to the balance between weak adsorbate-adsorbate interaction and comparable adsorbate-substrate interaction.
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21 May 2011
Research Article|
May 18 2011
The initial growth behavior of perylene on Cu(100)
Fang Hu;
Fang Hu
1Department of Physics,
Zhejiang University
, Hangzhou 310027, China
2Fundamental Department,
Ningbo Institute of Technology
, Ningbo 315100, China
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Hanjie Zhang;
Hanjie Zhang
1Department of Physics,
Zhejiang University
, Hangzhou 310027, China
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Hongying Mao;
Hongying Mao
1Department of Physics,
Zhejiang University
, Hangzhou 310027, China
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Qing Liao;
Qing Liao
1Department of Physics,
Zhejiang University
, Hangzhou 310027, China
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a)
Author to whom correspondence should be addressed. Electronic mail: [email protected].
J. Chem. Phys. 134, 194702 (2011)
Article history
Received:
February 10 2011
Accepted:
April 27 2011
Citation
Fang Hu, Hanjie Zhang, Hongying Mao, Qing Liao, Pimo He; The initial growth behavior of perylene on Cu(100). J. Chem. Phys. 21 May 2011; 134 (19): 194702. https://doi.org/10.1063/1.3591968
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