https://doi.org/10.1140/epjd/e2005-00224-4
Electronic excitation of ice monomers on Au(111) by scanning tunneling microscopy
Vibrational spectra and induced processes
1
Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, 14195 Berlin, Germany
2
Institut für Festkörperphysik, Abteilung Oberflächen Appelstr. 2, 30167 Hannover, Germany
Corresponding author: a heiko.gawronski@physik.fu-berlin.de
Received:
24
February
2005
Revised:
9
June
2005
Published online:
9
August
2005
Scanning tunneling microscopy, inelastic tunneling spectroscopy, and electron induced manipulation are used to investigate electronic excitation of D2O monomers and small clusters adsorbed at the elbows of the Au(111) reconstruction. Diffusion of molecules, dissociation of clusters, and rearrangement of the reconstruction is induced by electronic excitation. Threshold energies of between 200 and 250 meV and of 446 meV are explained by combined vibrational modes of D2O molecules. External vibrational modes of D2O molecules on Au(111) are identified by inelastic tunneling spectroscopy at ≈18, 30, and 41 meV.
PACS: 68.43.-h – Chemisorption/physisorption: adsorbates on surfaces / 82.37.Gk – STM and AFM manipulations of a single molecule / 68.37.Ef – Scanning tunneling microscopy (including chemistry induced with STM) / 68.43.Pq – Adsorbate vibrations
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005
