title: Single Molecule Vibrational Spectroscopy: CO Bonding to Edge and Terrace Positions on Ag, Au, and Pd Islands on NiAl(110).
abstract: The vibrational properties of single CO molecules adsorbed on nanosized Ag, Au, and Pd islands on a NiAl(110) surface were studied with a scanning tunneling microscope. The sensitivity of single molecule vibrational spectroscopy to aspects of the local environment is demonstrated by comparative studies of CO-metal bond vibrations at island terrace and island edge sites. Vibrational spectra of single CO molecules adsorbed on Ag, Au, and Pd island terraces showed peaks at 27, 32, and 44 meV, respectively, which are assigned to the hindered rotational mode. CO molecules on Au and Pd island edges, on the other hand, showed blue-shifted hindered rotational modes at 34 and 46 meV, respectively. On Au islands, CO molecules showed a strong preference for adsorption on edges, while no such preference was observed on Pd.
authors: Department of Physics and Astronomy and Department of Chemistry, University of California , Irvine, California 92697-4575, United States.
authors: T M
authors: TM
authors: Wallis
authors: Department of Physics and Astronomy and Department of Chemistry, University of California , Irvine, California 92697-4575, United States.
authors: N
authors: N
authors: Nilius
authors: Department of Physics and Astronomy and Department of Chemistry, University of California , Irvine, California 92697-4575, United States.
authors: W
authors: W
authors: Ho