Experimental Three-Dimensional Description of the Liquid Hexadecane/Graphite Interface

By using an atomic force microscope based on a quartz tuning fork sensor, a 3-dimensional description of the interface between liquid hexadecane and a highly oriented pyrolytic graphite surface can be achieved at room temperature. The C16H34 monolayer in contact with the substrate surface exhibits a...

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Bibliographic Details
Published in:Langmuir 2009-01, Vol.25 (2), p.639-642
Main Authors: Van, L. Pham, Kyrylyuk, V, Polesel-Maris, J, Thoyer, F, Lubin, C, Cousty, J
Format: Article
Language:English
Subjects:
Alkanes - chemistry
Chemistry
Colloidal state and disperse state
Electrodes
Exact sciences and technology
General and physical chemistry
Graphite - chemistry
Membranes, Artificial
Microscopy, Atomic Force
Microscopy, Scanning Tunneling
Quartz
Surface physical chemistry
Surface Properties
Temperature
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Summary:By using an atomic force microscope based on a quartz tuning fork sensor, a 3-dimensional description of the interface between liquid hexadecane and a highly oriented pyrolytic graphite surface can be achieved at room temperature. The C16H34 monolayer in contact with the substrate surface exhibits a lamellar structure whereas no observation at the liquid/graphite interface by scanning tunnelling microscopy was reported for this alkane. The second layer shows very weak corrugations corresponding to lamella boundaries. Force/distance curves show at least four oscillations separated by 0.4 nm except for the first period with a 0.38 nm distance that corresponds to the layer closer the substrate. Such a description agrees well with molecular dynamics results obtained on alkane/solid interfaces.
ISSN:0743-7463
1520-5827
DOI:10.1021/la803665k