Ultraviolet photoemission spectroscopy

Ultraviolet Photoelectron Spectroscopy Ultraviolet Photoemission Spectroscopy Molecular Photoelectron Spectroscopy... 

Ultraviolet photoemission spectroscopy Wavenumbers 8.065cm" = ImeV, 2000cm" length of 5 /tm... 

Ultraviolet photoemission spectroscopy( UPS) measurements of a Pd/ SiCVa-Si H structure indicate (Fortunato et al., 1984) that the mechanism responsible for the transport property variations is a change in the contact potential. In these experiments a few angstroms of a-Si have been deposited by an in situ evaporation onto a Pd/SiO substrate. Figure 5 shows the photoemission spectra obtained by synchrotron radiation at a photon energy of 30 eV and for three different conditions (1) after the a-Si deposition, (2) after the H2 exposure at 10-2 Torr for 2 min, and (3) after 02 exposure at 5 X 10-5 Torr and 110°C for 7 min. 

According to a combination of ultraviolet photoemission spectroscopy (UPS), LEED and ion scattering spectroscopy (ISS),53 the PH3 -exposed surface is covered by a P atom layer if annealed to 900 [K], This observation is also made if PH3 is adsorbed on the surface at 900 [K],... 

Angle-resolved ultraviolet photoemission spectroscopy ARUPS Electrons photoemitted from the valence and conduction bands of a surface are detected as a function of angle. This gives information on the dispersion of these bands (which is related to surface structure) and also structural information from the diffraction of the emitted electrons. Valence band structure... 

The surface dissociation of COj into CO(ads) and O(ads) has been proposed in the case of Na-modified Pd(lLl) and K-modified Pt(lll) 5 at submonolayer coverage on the basis of HREELS , and angle resolved ultraviolet photoemission spectroscopy (ARUPS). 59 pyjg presence of adsorbed atomic oxygen (a species capable of migrating into the bulk metal) for Na/Pd(lll) however, could not be detected with either of these techniques. 

Ultraviolet photoemission spectroscopy (UPS) has been used to measure the energy levels of small silver particles in a model system. We find that small particles have properties quite different from those of the bulk and that their electron-donating ability increases with size. The UPS difference spectrum of halogen chemisorbed to silver particles changes up to a size of 40 silver atoms, indicating the size range over which chemical properties are size dependent. 

I will illustrate the application of two techniques to the study of problems involving latent-image silver. These techniques are molecular orbital calculations and ultraviolet photoemission spectroscopy (UPS). The calculations are used to model the processes of formation of silver particles through photolysis. The spectroscopic measurements are used to determine properties of the silver particle as a function of its size. 

We have determined, both experimentally and theoretically, the one-electron density of states surrounding the Fermi level in polymeric sulfur nitride, (SN)X. The experimental measurements were performed using X-ray and ultraviolet photoemission spectroscopy (XPS and UPS), while the theoretical studies employed calculations based on OPW and pseudopotential band structures of (SN)X. 

In order to gain information on the elecronic structure of polymer sulfur nitride, (SN)X, we investigated the photoemission properties of this interesting material. The measurements were obtained on nonoriented (SN)X films using x-ray and variable ultraviolet photoemission spectroscopy (XPS and UPS) (1), (2). Table 1 shows the nitrogen and sulfur core levels in (SN)X and in neutral elements. 

Kera, S. et al.. Impact of an interface dipole layer on molecular level alignment at an organic-conductor interface studied by ultraviolet photoemission spectroscopy, Phys. Rev. B, 70, 085304, 2004. 

Angle-resolved photoemission spectroscopy (3, 24, 41-44) Angle-resolved ultraviolet photoemission spectroscopy (3, 42, 45-48)... 

Temperature programmed desorption (3, 157-159) Ultraviolet photoemission spectroscopy... 

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