SCANNING-TUNNELING-MICROSCOPY OF CLUSTERS ADSORBED ON SUPERPERIODIC LATTICE OF HIGHLY ORIENTED PYROLYTIC-GRAPHITE

We observed superperiodic lattices in clusters deposited on HOPG surfa ces by STM. Furthermore, we clearly identified two types of bias-volta ge dependences in the corrugation of superperiodic lattices. Cluster a dsorption sites are strongly influenced by the superperiodic lattices. On the superperiodic lattices, clusters are found to form arrays. Thi s suggests that one can control the surface electronic structure as we ll as the cluster array by preparing graphitic sheets with various sta cking arrangements.