Scanning Tunneling Microscopy and Spectroscopy Studies of Individual Lander Molecules Anchored on a Copper Oxide Nanotemplate

作者：Naitoh Y; Rosei F^*; Gourdon A; Laegsgaard E; Stensgaard I; Joachim C; Besenbacher F

来源：Journal of Physical Chemistry C, 2008, 112(41): 16118-16122.

DOI：10.1021/jp8053197

By means of scanning tunneling microscopy (STM), scanning tunneling spectroscopy (STS), and current image tunneling spectroscopy (CITS), we have studied the electronic properties of individual "Lander" molecules anchored on a nanopatterned Cu(110) surface. To hinder surface diffusion during STM and STS imaging and spectroscopy studies at room temperature, the molecules are immobilized in the troughs of the Cu-O nanotemplate which forms on the Cu(110) surface by exposure to oxygen at high temperature. STS spectra extracted from CITS images reveal no lateral dependency over the molecules, which indicates that the electronic features above the center of the molecules as well as above the four spacer legs are very similar. An electronic gap of similar to 2.2 eV was determined from the dI/dV spectra, which is tentatively ascribed to the highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) gap of the Lander molecules.

• 出版日期2008-10-16