DOI: 10.1063/1.453862. The orientation of Langmuir–Blodgett monolayers using NEXAFS

The orientation of Langmuir–Blodgett monolayers using NEXAFS

10.1063/1.453862

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

Carbon K-shell NEXAFS (near edge x-ray absorption fine structure) spectra of oriented hydrocarbon chains in Langmuir–Blodgett (LB) monolayers were measured and used to study the orientation of these molecules. The LB monolayers were assembled from arachidic acid or cadmium or calcium arachidate on the oxidized Si(111) surface. The observed NEXAFS resonances are assigned to transitions to excited states which are localized on individual CH2 groups or C–C bonds. From a detailed analysis using curve-fitting techniques of the angular dependence of the various spectral peaks, the hydrocarbon chains of the cadmium arachidate monolayer is estimated to lie within 15° of the surface normal, the hydrocarbon chains of the calcium arachidate monolayer is estimated to be tilted by 33±5° from the surface normal, while the arachidic acid monolayer is not ordered at all. The determined chain orientations are discussed in terms of a microscopic model involving lateral interactions between the zig–zag hydrocarbon chains.

Bibliography

Outka, D. A., StÃ¶hr, J., Rabe, J. P., & Swalen, J. D. (1988). The orientation of LangmuirâBlodgett monolayers using NEXAFS. The Journal of Chemical Physics, 88(6), 4076â4087.

Authors 4

D. A. Outka (first)
J. Stöhr (additional)
J. P. Rabe (additional)
J. D. Swalen (additional)

References 26 Referenced 183

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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 9:10 a.m.)
Deposited	1 year, 6 months ago (Feb. 10, 2024, 2:30 a.m.)
Indexed	1 year, 6 months ago (Feb. 11, 2024, 6:41 a.m.)
Issued	37 years, 5 months ago (March 15, 1988)
Published	37 years, 5 months ago (March 15, 1988)
Published Print	37 years, 5 months ago (March 15, 1988)

Funders 0

None

BibTeX

@article{Outka_1988, title={The orientation of Langmuir–Blodgett monolayers using NEXAFS}, volume={88}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.453862}, DOI={10.1063/1.453862}, number={6}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Outka, D. A. and Stöhr, J. and Rabe, J. P. and Swalen, J. D.}, year={1988}, month=mar, pages={4076–4087} }

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