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