Selective bonding of pyrazine to silicon(100)-2x1 surfaces: the role of nitrogen atoms |
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Authors: | Huang Hai Gou Huang Jing Yan Ning Yue Sheng Xu Guo Qin |
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Institution: | Department of Chemistry, National University of Singapore, 10 Kent Ridge, Singapore 119260, Singapore. |
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Abstract: | The covalent binding of pyrazine on Si(100) have been investigated using high-resolution electron energy loss spectroscopy (HREELS) and x-ray photoelectron spectroscopy. Experimental results clearly suggest that the attachment occurs exclusively through the bonding of the two para-nitrogen atoms with the surface without the involvement of the carbon atoms, as evidenced from the retention of the (sp2) C-H stretching mode in HREELS and a significant down shift of 1.6 eV in the binding energy of N 1s. The binding mechanism for pyrazine on Si(100) demonstrates that reaction channels for heteroatomic aromatic molecules are strongly dependent on the electronic properties of the constituent atoms. |
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