Self-assembled molecular chains formed by selective adsorption of lead-phthalocyanine on InSb(100)-(4x2)/c(8x2)

We study the structure of ultra thin lead-phthalocyanine (PbPc) overlayers deposited on the indium terminated InSb(100)-(4x2)/c(8x2) reconstructed surface by low-energy electron diffraction and scanning tunneling microscopy. The diffraction pattern for the PbPc monolayer grown on this surface corresponds to a 4x3 structure. We show that this structure is induced by a selective adsorption of the PbPc molecules on the indium stripes of the InSb(100) substrate. The adsorption is dominated by the interaction between the central lead atom of the molecule and the topmost indium atoms of the surface. (C) 2003 American Institute of Physics.