Formation of one-dimensional C60 rows on TiO2(110)-1 x 2-cross-link structure and their local polymerization.
Adsorption and growth of a C(60) monolayer on a TiO(2)(110)-1 x 2-cross-link structure were investigated by scanning tunneling microscopy (STM). Single C(60) molecules were preferentially anchored at the cross-link site due to interaction with undercoordinated Ti cations, and C(60) rows grew along the troughs between the 1 x 2-added rows. The C(60) monolayer structure is characterized by closely packed (r(C(60)-C(60)) = 1.0 nm) C(60) rows that are paired with every second added row (separation of paired rows is 1.1 nm). By applying a high negative bias voltage (-3.5 V) to an STM tip on the C(60) monolayer, C(60) oligomers were formed accompanied with the contraction of C(60)-C(60) distance along the C(60) row and bright contrast in the STM image.
Fukui
Ken-ichi
K
Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, Ookayama, Tokyo 152-8551, Japan. kfukui@chem.titech.ac.jp
Sakai
Motoyoshi
M