Photoelectron Spectroscopy

Hüfner, S.

doi:10.1007/978-3-662-03150-6

Cited by 839 publications

(508 citation statements)

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“…This geometry minimizes anisotropy effects in the resulting photoelectron spectra. 15 The emitted photoelectrons exit the interaction zone through a skimmer, which is situated approximately 2 mm from the liquid surface. Subsequently, their kinetic energy is determined by a hemispherical electron energy analyzer (VG Scienta, R4000).…”

Section: Xps Experimentsmentioning

confidence: 99%

“…14,15 The main advantages of XPS are that both the chemical state and the microscopic spatial distribution of the compounds can be probed directly. Utilizing this technique together with a liquid micro-jet setup, measured surface compositions of succinic acid in aqueous solution (SuccH 2 ) for various concentrations and pH values are reported in this work.…”

Section: Introductionmentioning

confidence: 99%

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Succinic acid in aqueous solution: connecting microscopic surface composition and macroscopic surface tension

Werner

Julin

Dalirian

et al. 2014

Phys. Chem. Chem. Phys.

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PostprintThis is the accepted version of a paper published in Physical Chemistry, Chemical Physics -PCCP. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the original published paper (version of record):Werner, J., Julin, J., Dalirian, M., Prisle, N., Ohrwall, G. et al. (2014) Succinic acid in aqueous solution: connecting microscopic surface composition and macroscopic surface tension. The water-vapor interface of aqueous solutions of succinic acid, where pH value and bulk concentration were varied, has been studied using surface sensitive X-ray photoelectron spectroscopy (XPS) and molecular dynamics (MD) simulations. It was found that succinic acid has a considerably higher propensity to reside in the aqueous surface region than its deprotonated form, which is effectively depleted from the surface due to the two strongly hydrated carboxylate groups. From both XPS experiments and MD simulations a strongly increased concentration of the acid form in the surface region compared to the bulk concentration was found and quantified. Detailed analysis of the surface of succinic acid solutions at different bulk concentrations led to the conclusion that succinic acid saturates the aqueous surface at high bulk concentrations. With the aid of MD simulations the thickness of the surface layer could be estimated, which enabled the quantification of surface concentration of succinic acid as multiple of the known bulk concentration. The obtained enrichment factors were successfully used to model surface tension of these binary aqueous solutions using two different models that account for surface enrichment. This underlines the close correlation of increased concentration at the surface relative to the bulk and reduced surface tension of aqueous solutions of succinic acid. The results of this study shed light on the microscopic origin of surface tension, a macroscopic property. Furthermore, the impact of the results from this study on atmospheric modeling is discussed.

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Section: Xps Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Succinic acid in aqueous solution: connecting microscopic surface composition and macroscopic surface tension

Werner

Julin

Dalirian

et al. 2014

Phys. Chem. Chem. Phys.

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“…Three different experimental techniques have been employed to study the decay of the electronic states at metal surfaces. Photoelectron spectroscopy (PES) [24][25][26] accesses the decay rate through the spectral lineshape and linewidth [27]. It is limited to occupied states below the Fermi energy.…”

Section: Introductionmentioning

confidence: 99%

Decay of electronic excitations at metal surfaces

Echenique

Berndt

Chulkov

et al. 2004

Surface Science Reports

437

403

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“…They are actually observed in the case for H 2 molecule ðH 2 ! H þ 2 Þ photoemission spectrum [12], the ''0-0'' peak at E 0 and the satellites at E ¼ E 0 À no 0 with the characteristic energy of the oscillator o 0 . The ''0-0'' peak corresponds to a transition between the ground states of the neutral and of the ionized system, while the satellites reflect the transitions to vibrationally excited states.…”

Section: Resultsmentioning

confidence: 99%

Laser-excited photoemission spectroscopy study of superconducting boron-doped diamond

Yokoya

Nakamura

Matushita

et al. 2006

Science and Technology of Advanced Materials

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We have investigated the low-energy electronic state of boron-doped diamond thin film by the laser-excited photoemission spectroscopy. A clear Fermi-edge is observed for samples doped above the semiconductor-metal boundary, together with the characteristic structures at 150 Â n meV possibly due to the strong electron-lattice coupling effect. In addition, for the superconducting sample, we observed a shift of the leading edge below T c indicative of a superconducting gap opening. We discuss the electron-lattice coupling and the superconductivity in doped diamond. r

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Photoelectron Spectroscopy

Abstract: Library of Congress Cataloging-in-Publication Data. Hiifner, Stefan, 1935-. Photoelectron spectroscopy: principles and applications/Stefan Hiifner. p. em.-(Springer series in solid-state sciences; 82) Includes bibliographical references and index.

Cited by 839 publications

References 0 publications

Succinic acid in aqueous solution: connecting microscopic surface composition and macroscopic surface tension

Succinic acid in aqueous solution: connecting microscopic surface composition and macroscopic surface tension

Decay of electronic excitations at metal surfaces

Laser-excited photoemission spectroscopy study of superconducting boron-doped diamond

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