Journal ArticleDOI
Investigation of the depth of preferential surface ordering in liquids: A photoelectron spectroscopic investigation of liquid mixtures
V. Bindu,T. Pradeep +1 more
TLDR
In this paper, angle resolved x-ray photoelectron spectroscopic studies of a series of liquid mixtures of a perfluoropolyether (Krytox 16350) and a polyphenylether (Santovac-5) show that the former spreads on the latter and the film thickness could even be smaller than the photoelectram mean free path.Abstract:
Angle resolved x-ray photoelectron spectroscopic studies of a series of liquid mixtures of a perfluoropolyether (Krytox 16350) and a polyphenylether (Santovac-5) show that the former spreads on the latter and the film thickness could even be smaller than the photoelectron mean free path. The molecular ordering in krytox remain as that of the free liquid which is manifested in the enhancement of the relative intensity of specific features in the photoelectron spectrum as the electron take-off angle is decreased. The preferential ordering is limited to the very top and an upper limit of this thickness is estimated to be about 8 A. This observation is in accordance with molecular dynamics simulations of long chain hydrocarbon liquids.read more
Citations
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Journal ArticleDOI
Tilted orientation of molecular chains at the surface of a series of perfluoropolyether liquids: an X-ray photoelectron spectroscopic investigation
V. Bindu,K. Smitha,T. Pradeep +2 more
TL;DR: Angle resolved X-ray photoelectron spectroscopic (XPS) studies of a series of perfluoropolyethers of general formula F[CF(CF3)CF2O] n CF2CF3, where n = 27, 65, and >70, show that there is preferential ordering of-CF3 groups at the liquid surfaces as discussed by the authors.
Journal ArticleDOI
Computational Investigation of Lithium-Ion Transport Mechanisms in Perfluoropolyether Polymers
Yukiko Kamikawa,Koji Amezawa +1 more
TL;DR: In this article , the coordination structures and diffusion in PFPEs terminated with hydroxyl or carboxyl moieties and poly(ethylene oxide) (PEO) embedded with lithium and bis(trifluoromethylsulfonyl)imide ions were characterized using molecular dynamics.
References
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Isomerization reaction dynamics and equilibrium at the liquid-vapor interface of water. A molecular-dynamics study
Ilan Benjamin,Andrew Pohorille +1 more
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Preferential molecular ordering at the surface of a liquid perfluoropolyether revealed by x‐ray photoelectron spectroscopy
S. Ramasamy,T. Pradeep +1 more
TL;DR: In this paper, the surface chemical constitution of a liquid perfluorinated polyether, F[CF(CF3)CF2O]27(ave)CF 2CF3 has been investigated by x-ray photoelectron spectroscopy.
Journal ArticleDOI
Attenuation length measurements in cadmium arachidate Langmuir-Blodgett films
Murali Sastry,P. Ganguly,S. Badrinarayanan,A.B. Mandale,Sudhakar R. Sainkar,D. V. Paranjape,Kashinath R. Patil,S. K. Chaudhary +7 more
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Journal ArticleDOI
Chemical constitution of a perfluoropolyether liquid surface. A photoelectron spectroscopic study
TL;DR: Angle resolved X-ray photoelectron spectroscopy from a liquid perfluoropolyether showed that its surface is primarily composed of chain ends oriented nearly perpendicular to the surface as discussed by the authors.
Journal ArticleDOI
Surface Structure of A Liquid Perfluoropolyether Examined by Reactive Ion/Surface Scattering
TL;DR: In this paper, the microscopic structures of perfluorinated polyether (PFPE) liquid surfaces are characterized by ion/surface collision experiments in a mass spectrometer and the results are compared to those obtained with a fluorinated self-assembled monolayer (F-SAM) surface.
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