Reply to comment on 'The structure of monolayer SiO_2 on Mo(112): A 2-D [Si-O-Si] network or isolated [SiO_4] units?'

摘要

First, in response to the above Comment [1] it is important to consider the following experimental observations: (i) high resolution electron energy loss spectroscopy (HREELS) [2] and infrared reflection adsorption spectroscopy (IRAS) [3-6] show intense asymmetric vibrational modes related to Si-O-Mo (1048 cm~(-1) in HREELS and 1056-1059 cm~(-1) in IRAS), whereas no active asymmetric vibrational modes related to Si-O-Si (1176 cm~(-1) in HREELS and 1200-1250 cm~(-1) in IRAS) are in evidence for SiO_2(1 ML)/Mo(112), (see Fig. 1). These data indicate the absence of Si-O-Si species, i.e. the presence of isolated [SiO_4] units [2], or that the axis of the bonding in the Si-O-Si moities are essentially parallel to the substrate surface.