AVS 51st International Symposium
    Surface Science Tuesday Sessions
       Session SS-TuP

Paper SS-TuP42
Deconvolution of the Fuchs-Kliewer Phonon Spectrum of Co@sub 3@O@sub 4@(110) Single Crystal Surfaces

Tuesday, November 16, 2004, 4:00 pm, Room Exhibit Hall B

Session: Poster Session
Presenter: E.M. Malone, University of Nebraska-Lincoln
Authors: E.M. Malone, University of Nebraska-Lincoln
S.C. Petitto, University of Nebraska-Lincoln
M.A. Langell, University of Nebraska-Lincoln
Correspondent: Click to Email
The Fuchs-Kliewer phonon spectrum of single crystal Co@sub 3@O@sub 4@(110) has been treated with a Fourier transform log deconvolution method which removes multiple scattering features from the single loss spectrum. Auger electron spectroscopy (AES), X-ray photoelectron spectroscopy (XPS) and low-energy electron diffraction (LEED) first characterized the Co@sub 3@O@sub 4@ crystal establishing the cleanliness, composition, and order of the (110) surface. High resolution electron energy loss spectroscopy (HREELS) was then used to obtain the phonon spectrum over the incident electron energy range of 2.25 to 14.25 eV. Due to the strong dipole cross section for the Fuchs-Kliewer phonon modes, intense multiple electron scattering was detected, which provided a complicated and overlapping combination of all possible loss modes. Deconvolution removed the multiple loss modes to produce well-resolved Fuchs-Kliewer fundamental phonon losses at 26.8, 47.5, 71.1 and 84.7 meV (216, 383, 573 and 683 cm-1). The series of multiple loss peaks were also identified using standard peak fitting procedures, which also confirmed the single loss energies obtained with the deconvolution procedure.