2008 Volume 51 Issue 3 Pages 124-127
We investigated the adsorption process of copper phthalocyanine (CuPc) on the clean and the hydrogen terminated 6H-SiC(0001)-(3×3) surfaces using scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy and Auger electron spectroscopy. When CuPc was deposited on the clean (3×3) surface, we observed bright 1-spot shapes in the STM image. These protrusions with 1-spot shape correspond to the CuPc molecules adsorbed on the clean (3×3) surface. When CuPc was deposited on the hydrogen-adsorbed (3×3) surface, both bright 1-spot and 4-spots shapes appeared. These results indicate that the interaction between CuPc and the surface structure affects the shape of the CuPc in the STM image.
