Showing papers in "Applications of Surface Science in 1983"

TL;DR: In this article, the authors focused on XPS studies of silicon in a number of diverse environments and demonstrated the interconnection of XPS techniques and results over fields that often seem totally divorced from one another.

TL;DR: In this article, the effect of ion-induced decomposition of the surface of a semiconductor material was investigated using X-ray photoelectron spectroscopy (XPS).

TL;DR: In this article, it was concluded that surface reduction by impurity carbon is responsible for the formation of Cu I from Cu II and that charge transfer between bulk and surface layer causes the retransition.

TL;DR: In this article, the present status of the field emission cathode array development program at SRI International is reported, and the results show that cathodes of this type can achieve current densities of more than 50 A/cm 2, and that lifetimes of well in excess of 50,000 h can be expected under controlled conditions.

TL;DR: In this article, it was shown that the dispersion contribution to metal-oxide interfacial energies is not the only important term, but also the insulator refractive index is useful as a classifier.

TL;DR: In this paper, the results of X-ray photoemission spectroscopy (XPS) and Auger electron spectrographs were used to characterize the adsorbates of K+ and OH.

TL;DR: In this paper, the authors showed that the active state for B-type impregnated cathodes can be reproduced by a near monolayer of the stoichiometric BaO on the W surface, where the density of Ba atoms (or O atoms) in this "monolayer" should be ∼ one half that of the W atoms.

TL;DR: In this paper, an increase of the electron density of the metallic nickel due to the presence of potassium is given, and no experimental evidence of a direct interaction between the promoter and the adsorbed CO was found.

TL;DR: In this paper, electron energy loss spectroscopy was used to study the reaction of submonolayer doses of HCOOH with a Pt(111)-O surface and showed a nonlinear coverage dependence of scattering coefficients for either, or both, the adsorbed oxygen or formate species.

TL;DR: In this article, the authors showed that the Si(92 eV) Auger peak splits into two peaks upon alloying, making identification of alloyed silicon possible, and that surface silicon is in an alloyed form for both Cu3Si and Cu0.95Si0.05.

TL;DR: The surface composition of a number of Pt-Cu alloys varying in their bulk composition from approximately 40 up to 80 at% Pt has been studied by Auger Electron Spectroscopy.

TL;DR: In this paper, the oxidation states of thin Ba films on Ir have been studied using an analysis of interatomic Auger lines and the results showed that the magnitude of all AES lines whose energy indicated an O valence state was observed to increase with oxidation while those ascribed to Ba valence states decreased.

TL;DR: In this article, a method for removing the contribution of inelastically scattered Auger electrons from an Auger electron spectrum is presented, where each spectral data point is defined as a delta function which is convolved with an inelastic scattering function.

TL;DR: In this article, a model is developed to interpret the changes in the work function upon coadsorption of two or more different species on metal surfaces, where both mobile and localized random adsorption are considered.

TL;DR: In this article, the formation and oxidation of the Pd/Si interface is observed at room temperature, and intermixing produces a surface phase consisting of Pd silicide with some dissolved C. The dependence of the Si(L2,3VVV) lineshape on Pd coverage and on annealing suggests that the local environment of Si in the silicide is that of a mixture of pd3Si and Pd4Si rather than that of Pdr2Si, which is formed when Pd is deposited on elemental Si.

TL;DR: In this article, a method of determining the thickness of vapor-deposited thin Ba films is described, which is expressed in terms of numbers of Ba monolayers which were defined and characterized on W(100) and Ir (100) substrates using Low Energy Electron Diffraction (LEED) and Auger Electron Spectroscopy (AES).

TL;DR: In this article, a mathematical treatment of the currentvoltage characteristics of a planar diode has been used to evaluate work function distributions of cathode surfaces, and results obtained on various cathode types operated at different temperature and time are presented.

TL;DR: The relationship between the positions of the peaks at ∼ 417-420 and ∼ 411-415 eV is shown to be a sensitive indicator of the average stoichiometry of the surface as mentioned in this paper.

TL;DR: In this article, the compositions and properties of the oxides formed at 400°C on Fe-Cr alloys were studied and it was found that for the Cr additions (Cr = 3%), the oxide consists mainly of iron.

TL;DR: In this article, a thermodynamic model has been formulated to describe the effects of temperature and composition on the chemistry of barium and barium oxide (Ba/BaO) generation from dispenser cathode impregnants.

TL;DR: In this article, the absorption and oxidation of methanol on Ag(111) has been studied by photoelectron spectroscopy and showed that for thick multilayers an enhanced intensity for the carbon 1s compared to the oxygen 1s occurs which can be explained by simple considerations of the escape depth.

TL;DR: In this article, the authors performed in situ observation of the Ag electrode surface when DC current was passed through a system of P O 2,Ag∣ZrO 2 -CaO∣Ag, P O′ 2.

TL;DR: In this article, the authors examined the surfaces of four cathode types: CD, M, Scandate, and scandate cathodes in terms of surface models which would be consistent with the observed data.

TL;DR: In this paper, an improved vibrating capacitor is described which is particularly suited for kinetic studies and the adsorption of CO on a Fe(110) surface has been studied by means of the change in the work function.

TL;DR: In this article, the surface composition and the state of oxidation of barium are studied and their variations are also observed as a function of the temperature on new cathodes and on cathodes after long operation time.

TL;DR: XPS measurement of the effect of xanthate adsorption on galena samples treated with deoxygenated and oxygenated xanthates solutions have been made as discussed by the authors, where the Pb 4f, S 2P, C 1s and O 1s levels were recorded.

TL;DR: In this paper, a model for the adsorption is proposed assuming formation of an ordered first monolayer reaching a maximal amount of order at complete substrate coverage, and the order is rapidly lost in the successive layers.

TL;DR: In this article, a model compound has been synthesised to simulate an amine cured epoxy resin IET spectra of the compound adsorbed on a junction from solution suggest that bonding to the oxide occurs by chemisorption Possible modes of bonding are discussed with reference to IETS results for related compounds.

TL;DR: In this article, the Schottky part of the characteristics (saturation region) of thermionic cathodes, taking into account both space charge and initial velocities, can be accurately represented by an analytic expression.

TL;DR: In this paper, a classification system for stratified surfaces is proposed and methods for analysis are presented. And the concepts of stratified surface are discussed using both theoretical and experimental examples, and it is shown that these data analysis techniques are far more useful for the specification of engineering surfaces than is the usual technique of reporting parameters obtained from analysis of surface profiles as a whole.