The Development of Auger Spectroscopy as a Probe of Local Electronic Structure

Weightman, P.

doi:10.1051/mmm:1995123

Cited by 34 publications

(6 citation statements)

References 95 publications

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“…3,4 In general, such studies have been limited to determining the changes in the intensity of characteristic elemental spectra, for example, N 1s and C 1s in order to obtain insight into different functionalities. However, in principle, electron spectroscopy techniques have the potential to yield information on local electronic structure 5 that can lead to a detailed understanding of the bonds formed between proteins and surfaces. In this work, we apply electron spectroscopy techniques to study the changes in the surface electronic structure of a Si polymer, poly(dimethylsiloxane) (PDMS).…”

Section: Introductionmentioning

confidence: 99%

Changes in the electronic structure of silicone rubber surfaces induced by oxygen plasma treatment

Haines

Beamson

Williams

et al. 2007

Surface & Interface Analysis

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The electron spectroscopy of poly(dimethylsiloxane) (PDMS) and PDMS following oxygen plasma treatment and subsequent exposure of the plasma-treated surface to glycine are compared. The results obtained for the Auger parameter show no significant differences, whereas the results for the valence band spectra are consistent with the changes that are expected to occur as a result of the replacement of CH 3 groups by oxygen and OH groups during the plasma treatment and by the adsorption of glycine. Differences observed in line shape of the Si KLV spectra for PDMS and pure Si are attributed to the changes in the local Si environment in PDMS. The oxygen plasma treatment introduces a small shift in the local p DOS to lower binding energies and exposure of the plasma-treated surface to glycine introduces a similar small shift in the p DOS to higher binding energies.

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Section: Introductionmentioning

confidence: 99%

Changes in the electronic structure of silicone rubber surfaces induced by oxygen plasma treatment

Haines

Beamson

Williams

et al. 2007

Surface & Interface Analysis

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“…While Auger signals are detected by XPS spectrometers, E kin may also be directly measured in Auger electron spectroscopy (AES), which by itself constitutes a highly developed experimental method for chemical analysis [1,[40][41][42]. The process of the Auger transition can be described by two basic steps.…”

Section: Auger Effectmentioning

confidence: 99%

“…Auger electron spectroscopy (AES) is a widely used experimental method for the measurement of Auger electron kinetic energies [1,[40][41][42]. Analogous to the case of core-level binding energies, the Auger electron kinetic energies are atom specific and sensitive to the chemical environment.…”

Section: Auger Kinetic Energy and Parameter Shiftmentioning

confidence: 99%

First principle calculations of core-level binding energy and Auger kinetic energy shifts in metallic solids

Olovsson

Marten

Holmström

et al. 2010

Journal of Electron Spectroscopy and Related Phenomena

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We present a brief overview of recent theoretical studies of the core-level binding energy shift (CLS) in solid metallic materials. The focus is on first principles calculations using the complete screening picture, which incorporates the initial (ground state) and final (core-ionized) state contributions of the electron photoemission process in x-ray photoelectron spectroscopy (XPS), all within density functional theory (DFT). Considering substitutionally disordered binary alloys, we demonstrate that on the one hand CLS depend on average conditions, such as volume and overall composition, while on the other hand they are sensitive to the specific local atomic environment. The possibility of employing layer resolved shifts as a tool for characterizing interface quality in fully embedded thin films is also discussed, with examples for CuNi systems. An extension of the complete screening picture to core-core-core Auger transitions is given, and new results for the influence of local environment effects on Auger kinetic energy shifts in fcc AgPd are presented.

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“…Thus the values of µ will not become equal. Thus, since it is likely that both sp and sd bands are involved, we follow Weightman (1995) in writing: The situation for the present series is shown in ® gure 7 as a plot of ¬ 0 Al versus µ Al for the series of compounds.…”

Section: } 5 Discussionmentioning

confidence: 96%

An X-ray photoelectron study of valence charge in transition metal aluminides

Castle¹

2000

Philosophical Magazine A

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In an earlier paper we proposed a new method for interpretation of background structure in X-ray photoelectron (XP) spectra and showed that this could be used to study bonding states in intermetallic compounds using, as an example, a particular Ti± Al alloy. In this paper we have applied this method to study a set of aluminides: Me± Al alloys, where Me represents a transition metal: Ti, V, Fe, Ni or Nb. The method for background interpretation is based on a peak-shape parameter µ, which links the intrinsic energy loss structure, associated with a given line in the XP spectrum, to the atomic number. This parameter is thus related to the number of ® nal state con® gurations available to the photoexcited atom or ion and we show, now, how the value for aluminium varies across a series of compounds with the transition metals. The results for µ are accompanied by measurement of the Auger parameters which may be indicative of the charge transfer occurring between Al and Me and thus are also in¯uenced by the ® nal state con® guration. The approximate proportionality found between these two parameters gives con® rmation that µ may be a sensitive probe of the ® nal state and bonding e ects and con® rms the extent to which aluminium orbitals interact with the 3d transition metal structure of vanadium, iron and nickel, and the 4d of Nb. This is in full accord with the results obtained from the TiAl alloy. Complementary information was obtained by comparing the values of µ for the pure metals with those for the vanadium, iron, nickel, niobium and aluminium peaks in the intermetallic compound. XP spectra have been obtained from the alloys and these are also presented in the paper. As a result of this work it is concluded that the ® nal state features of the spectra result from charge transfer between sp and sd valence bands.

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The Development of Auger Spectroscopy as a Probe of Local Electronic Structure

Cited by 34 publications

References 95 publications

Changes in the electronic structure of silicone rubber surfaces induced by oxygen plasma treatment

Changes in the electronic structure of silicone rubber surfaces induced by oxygen plasma treatment

First principle calculations of core-level binding energy and Auger kinetic energy shifts in metallic solids

An X-ray photoelectron study of valence charge in transition metal aluminides

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