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| VOLUME 92 (2010) | ISSUE 7 | PAGE 495 |
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Initial stage of flourofullerene molecules adsorption on Si surface
A. I. Oreshkin
 , R. Z. Bakhtizin*, P. Murugan∇, V. Kumar , N. Fukui , T. Hashizume , T. Sakurai°+Moscow State University, Department of Physics, 119992 Moscow, Russia *Department of Physical Electronics, Bashkir State University, 450074 Ufa, Russia ∇Central Electrochemical Research Institute, 630006 Karaikudi, Tamil Nadu, India Dr. Vijay Kumar Foundation, 1969 Sector 4, 122001 Gurgaon, Haryana, IndiaWPI-AIMR, Tohoku University 2-1-1 Katahira, Aoba-ku, 980-8577 Sendai, Japan Advanced Research Laboratory, Hitachi, Ltd. Hatoyama, 350-0395 Saitama, Japan°Tohoku University 2-1-1 Katahira, Aoba-ku, 980-8577 Sendai, Japan
Abstract
Spatially resolved images of an individual C60F18 fluorofullerene molecule on Si(100)-2 × 1 surface have been obtained using scanning tunneling microscopy (STM). STM results and ab initio calculations show that the fluorofullerene molecules interact with the Si(100)-2×1 surface with F atoms pointing down towards the surface. The adsorption energy of a C60F18 molecule on Si(100)-2×1 surface is  eV, which is much higher than the adsorption energy
of the same molecule on Si(111)-7×7 surface (6.65 eV).
C60F18 molecules are located in the
troughs in-between the dimer rows
occupying the four-dimer site on Si(100)-2×1 surface.
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