文摘
Copper phthalocyanine (CuPc) on reconstructed rutile TiO2 was studied with ultrahigh vacuum variabletemperature scanning tunneling microscopy. On cross-linked TiO2(110)-(1 × 2), the CuPc molecules at lowcoverages sparsely lay flat at the link sites and tilted in troughs between [001] rows. Increase of the CuPccoverage led to the trapping of the CuPc molecules by the rectangular surface cells fenced by the oxygencolumns along the [001] direction and the cross-link rows. Each cell could trap one CuPc molecule atintermediate coverages and two CuPc molecules at higher coverages. On TiO2(210), the CuPc moleculestilted in defect-free areas and lay at defect sites with their molecular planes parallel to the substrate surface.Further increase of the CuPc coverage induced the formation of one- and two-dimensional assemblies onTiO2(210).