title: Selective bonding of pyrazine to silicon(100)-2x1 surfaces: the role of nitrogen atoms.
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.
authors.affiliation: Department of Chemistry, National University of Singapore, 10 Kent Ridge, Singapore 119260, Singapore.
authors.forename: Hai Gou
authors.initials: HG
authors.lastname: Huang
authors.forename: Jing Yan
authors.initials: JY
authors.lastname: Huang
authors.forename: Yue Sheng
authors.initials: YS
authors.lastname: Ning
authors.forename: Guo Qin
authors.initials: GQ
authors.lastname: Xu