VIBRATIONAL SPECTROSCOPY OF CO/CU(211) WITH A CO TERMINATED TIP

Vibrational excitations of an isolated CO molecule adsorbed on a Cu(211) surface have been, for the first time, observed with a CO terminated scanning tunneling microscope tip. Both the frustrated translational and rotational modes were observed, and in agreement with the case of a metallic tip. The presence of a CO molecule on the tip, transferred by controlled vertical manipulation, strongly influences the frustrated translational mode of the CO molecule, while it does not affect the frustrated rotational mode. The present work demonstrates that scanning tunneling vibrational spectroscopy is also possible with a molecule at the end of the tip, opening new interesting fields of research and putting some more light on the still open question of inelastic tunneling and its selection rules.

[1]  Ho,et al.  Single-molecule vibrational spectroscopy and microscopy , 1998, Science.

[2]  Gwyn P. Williams,et al.  A high resolution helium atom scattering and far infrared study of the dynamics and the lateral potential energy surface of CO molecules chemisorbed on Cu(001) , 1998 .

[3]  Gerd Meyer,et al.  BASIC STEPS OF LATERAL MANIPULATION OF SINGLE ATOMS AND DIATOMIC CLUSTERS WITH A SCANNING TUNNELING MICROSCOPE TIP , 1997 .

[4]  K. Rieder,et al.  Controlled vertical manipulation of single CO molecules with the scanning tunneling microscope: A route to chemical contrast , 1997 .

[5]  P. Sautet.  Atomic adsorbate identification with the STM: a theoretical approach , 1997 .

[6]  Meyer,et al.  Scanning Tunneling Microscopy Manipulation of Native Substrate Atoms: A New Way to Obtain Registry Information on Foreign Adsorbates. , 1996, Physical review letters.

[7]  A. Graham,et al.  A He‐atom scattering study of the frustrated translational mode of CO chemisorbed on defects on copper surfaces , 1996 .

[8]  G. Meyer.  A simple low‐temperature ultrahigh‐vacuum scanning tunneling microscope capable of atomic manipulation , 1996 .

[9]  J. Toennies,et al.  High-Resolution Helium Atom Time-of-Flight Spectroscopy of Low-Frequency Vibrations of Adsorbates. , 1996, Chemical reviews.

[10]  Williams,et al.  Adsorbate-substrate resonant interactions observed for CO on Cu(100) in the far infrared. , 1990, Physical review letters.

[11]  D. Eigler,et al.  Positioning single atoms with a scanning tunnelling microscope , 1990, Nature.

[12]  P. Hansma.  Inelastic electron tunneling , 1977 .

[13]  J. Lambe,et al.  Molecular Vibration Spectra by Electron Tunneling , 1966 .