Distribution of ions in subsurface layers of liquid solutions studied by ARXPS

Baschenko, O.A.; Bökman, Fredrik; Bohman, Ove; Siegbahn, Hans

doi:10.1016/0368-2048(93)85002-3

Cited by 26 publications

(18 citation statements)

References 30 publications

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“…The evaluation program models the electron intensity loss in different depth layers and for elastic photoelectron scattering within the sample and accounts for the X-ray photoemission characteristics of the respective core levels, with details given in references. 95,62 The resulting depth concentration profiles of the three molecule species in a 1.0 molar solution are shown in Fig. 19 in units of the mean free electron path aei.…”

Section: Potassium Octanoate In Formamide Solutionmentioning

confidence: 99%

“…This was recently demonstrated in an angular resolved X-ray photoelectron spectroscopy (ARXPS) study by Baschenko et photoelectron data. 95 In this study a 0.5 M (and a 1.0 M) solution of potassium octanoate in formamide was analyzed on a rotating wheel wetted surface (equivalent to Fig. 1(d)), located in the focus of an X-ray photoelectron apparatus (Al Ka, by = 1486 eV).…”

Section: Potassium Octanoate In Formamide Solutionmentioning

confidence: 99%

See 1 more Smart Citation

Photoelectron Spectroscopy at Liquid Surfaces

Faubel

2000

Photoionization and Photodetachment

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Section: Potassium Octanoate In Formamide Solutionmentioning

confidence: 99%

Section: Potassium Octanoate In Formamide Solutionmentioning

confidence: 99%

Photoelectron Spectroscopy at Liquid Surfaces

Faubel

2000

Photoionization and Photodetachment

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“…With this technique, the fractional concentration‐depth profiles of components near the surface can be reconstructed and the surface structure can be described at molecular level. It has been adopted to investigate the surface structure of ionic surfactant solution for many decades 11–14. In the previous references,11, 12 with ARXPS, the fractional concentration‐depth profiles quaternary ammonium surfactants have been reconstructed as an exponential function, under the assumption that ions with opposite charge have an identical distribution near the surface.…”

Section: Introductionmentioning

confidence: 99%

Surface structure of cationic surfactant solutions investigated by angular resolved X‐ray photoelectron spectroscopy with calibrated transmission function

Wang

Morgner

2011

Surface & Interface Analysis

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The main goal of the present work is to investigate the surface structure of cationic surfactant solutions by angular resolved X-ray photoelectron spectroscopy (ARXPS) after calibrating transmission function of the spectrometer. We have estimated the transmission function of the ARXPS spectrometer, and with it, we investigated solution of tetrabutylammonium iodide in a nonaqueous polar solvent. By genetic algorithm, the fractional concentration-depth profiles of constituents were reconstructed. These depth profiles evidence the enrichment of surfactant and the depletion of solvent in the surface regime and verify the separate distributions of oppositely charged surfactant ions. From those profiles we draw a conclusion that there is a preferred orientation for cation present at the surface, and the possibility for cation to take this orientation is related to its surface amount.

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“…405) was used here. The sampling distances were converted into time of contact of the freshly prepared surface to the vacuum via equation (10). The experiment was reproduced three times for the mixture shown.…”

Section: W Ater and Formamidementioning

confidence: 99%

“…The exact shape and perpendicular extension of the segregation pro® le are not derivable from a macroscopic theoretical framework (equation (1)). Hopefully the availability of reliable experimental data will stimulate the development of a detailed molecular model for surface segregation at liquid surfaces, but so far only very few detailed studies on the shape of the concentration pro® les have been reported [10,11].…”

Section: Introductionmentioning

confidence: 99%

The static and dynamic surface composition of formamide-benzyl alcohol and water-formamide liquid mixtures studied by means of HeI photoelectron spectroscopy

Faubel¹,

Steiner²,

Toennies³

1997

Molecular Physics

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The static and dynamic surface composition of formamide-benzyl alcohol and water-formamide liquid mixtures studied by means of HeI photoelectron spectroscopy,The free surfaces of two binary liquid mixture systems over the whole range of bulk molar composition have been studied using HeI photoelectron spectroscopy in a thin, fast¯owing jet arrangement. The spectra of the ® rst group of mixtures, benzyl alcohol and formamide, are found to be deconvolutable by a weighted sum of the pure component spectra. Slight deviations in the procedure allow an estimate to be made of the surface orientation of single benzyl alcohol molecules on top of the formamide solvent. The relative surface composition in the top layer is extracted by the deconvolution procedure. Time relaxation of the surface composition is observed with time constants of the order of several tens of m s. The results of the second group of mixtures, water and formamide, show more complicated features, with one component rapidly evaporating on the time scale of the experiment. The relative surface composition is estimated by a constrained deconvolution involving mainly the ® rst two ionization bands of the components. The location of individual peak structures changes markedly with the mixture composition ratio. The energy values of the ® rst ionization bands indicate a solvent± solvate transition near a 2:1 to 3:1 bulk molar fraction of water. Time relaxation of the surface composition is observed also in these mixtures.

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Distribution of ions in subsurface layers of liquid solutions studied by ARXPS

Cited by 26 publications

References 30 publications

Photoelectron Spectroscopy at Liquid Surfaces

Photoelectron Spectroscopy at Liquid Surfaces

Surface structure of cationic surfactant solutions investigated by angular resolved X‐ray photoelectron spectroscopy with calibrated transmission function

The static and dynamic surface composition of formamide-benzyl alcohol and water-formamide liquid mixtures studied by means of HeI photoelectron spectroscopy

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