Topic
Photoemission spectroscopy
About: Photoemission spectroscopy is a research topic. Over the lifetime, 10821 publications have been published within this topic receiving 250888 citations. The topic is also known as: photoelectron spectroscopy & PES.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, a negative ion photoelectron spectrometer using time-of-flight for both ion mass selection and photo-electron energy analysis is described and demonstrated on the 532 nm photodetachment of the well-known O − and O − 2 ions.
149 citations
TL;DR: In this article, the change of atomic and electronic structures of fluorinated single-walled carbon nanotubes (SWCNTs) using x-ray photoemission spectroscopy (XPS), electrical resistivity measurements, and transmission electron microscopy (TEM) was investigated.
Abstract: We have investigated the change of atomic and electronic structures of fluorinated single-walled carbon nanotubes (SWCNTs) using x-ray photoemission spectroscopy (XPS), electrical resistivity measurements, and transmission electron microscopy (TEM). The fluorine content increases with increasing reaction temperature up to 300 °C. XPS indicated that the fluorinated SWCNT reveals an ionic-bonding character at low concentration and covalent-bonding character at high concentration. The resistivity increases with reaction temperatures, resulting from the band gap enlargement at high fluorine concentration. It is also observed from TEM that the fluorination at reaction temperature above 250 °C leads to the disintegration of the CNT structures and formation of various phases such as multiwall-like and turbostratic morphologies.
148 citations
TL;DR: The effects of photon wave vector on wave vector conservation, and methods for the removal of phonon-associated smearing of features and photoelectron diffraction effects are assessed.
Abstract: Traditional ultraviolet/soft X-ray angle-resolved photoemission spectroscopy (ARPES) may in some cases be too strongly influenced by surface effects to be a useful probe of bulk electronic structure. Going to hard X-ray photon energies and thus larger electron inelastic mean-free paths should provide a more accurate picture of bulk electronic structure. We present experimental data for hard X-ray ARPES (HARPES) at energies of 3.2 and 6.0 keV. The systems discussed are W, as a model transition-metal system to illustrate basic principles, and GaAs, as a technologically-relevant material to illustrate the potential broad applicability of this new technique. We have investigated the effects of photon wave vector on wave vector conservation, and assessed methods for the removal of phonon-associated smearing of features and photoelectron diffraction effects. The experimental results are compared to free-electron final-state model calculations and to more precise one-step photoemission theory including matrix element effects.
148 citations
TL;DR: In this article, a detailed analysis of line shape studies of bulk-and surface-emission peaks measured on noble-metal surfaces and their interpretation in terms of electron and photohole lifetimes, electron-phonon interaction and defect scattering is presented.
147 citations
TL;DR: A detailed mechanism for the reaction of Ti with polyimides is described in this paper, and this mechanism is confirmed by model pyromellitimide reaction with Ti0 suspension in solution.
Abstract: Chemical bonding and reaction of in situ deposited Ti on a series of polyimide surfaces have been investigated. X‐ray photoelectron spectroscopy has been used to probe site specific information for bonding of various functional groups of polyimide molecules, while ultraviolet photoelectron spectroscopy has been applied to monitor the change of the Ti d bands and the polyimide molecular orbitals near the Fermi energy as a function of overlayer coverage. At low coverages, the polyimide surfaces react strongly with Ti and strong charge transfer via the carbonyl group occurs. As the coverage increases, a Ti–C bond formation has been identified. A detailed mechanism for the reaction of Ti with polyimides is described, and this mechanism is confirmed by model pyromellitimide reaction with Ti0 suspension in solution.
147 citations