Adsorption behavior of iron phthalocyanine at the initial stage on Cu(100) surface |
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Authors: | R.A. Rehman Weidong Dou Huiqin Qian Hongying Mao Frederik Floether Hanjie Zhang Haiyang Li Pimo He Shining Bao |
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Affiliation: | 1. Physics Department, Zhejiang University, Hangzhou, 310027, China;2. Physics Department, Forman Christian College University, Lahore-54600, Pakistan;3. Department of Physics, Shaoxing University, Shaoxing, 312000, China;4. Homerton College, University of Cambridge, UK |
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Abstract: | The adsorption behavior of iron phthalocyanine (FePc) on the Cu(100) surface at the initial stage has been investigated by combining scanning tunneling microscopy (STM) and density functional theory (DFT) calculations. At low coverage, FePc molecules deposited on the sample surface at room temperature tend to adsorb dispersedly with their molecular planes parallel to the crystallographic directions of the substrate. Another interesting STM observation for the sub-monolayer coverage is that the molecular axes of FePc are aligned along [037] (as well as ) azimuth. At the monolayer coverage and elevated temperature, two types of ordered structures are observed. The FePc adsorption sites for the experimentally observed two distinct ordered domains have been revealed through DFT calculations. With further increasing the coverage, molecular clusters are formed particularly near the step edges. |
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