An epitaxial organic film. The self-assembled monolayer of docosanoic acid on silver(111)
- Almaden Research Center, San Jose, CA (United States)
Docosanoic acid in solution spontaneously forms an ordered self-assembled (SA) monolayer on the silver(111) surface, exposing methyl groups to the atmosphere. The contact wetting angles for water and hexadecane are 116[degrees] and 55[degrees], respectively. Surface X-ray diffraction shows that the in-plane structure of the SA monolayer is p(2 [times] 2). The SA monolayer is present in domains of about 215 A with a mosaic spread of 0.85[degrees]C. The chains within the monolayer are titled at 27 [+-] 1[degrees] from the surface normal toward the near neighbors. We conclude that the carboxylate group is bound nearly normal to specific sites on the Ag surface and that this determines the interchain spacing. The tilt angle is a consequence of this interchain spacing. 17 refs., 6 figs., 1 tab.
- OSTI ID:
- 5989470
- Journal Information:
- Langmuir; (United States), Vol. 9:4; ISSN 0743-7463
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
SILVER
MOLECULAR STRUCTURE
X-RAY DIFFRACTION
ADSORPTION
CARBOXYLIC ACIDS
FILMS
HEXADECANE
SOLUTIONS
ALKANES
COHERENT SCATTERING
DIFFRACTION
DISPERSIONS
ELEMENTS
HYDROCARBONS
METALS
MIXTURES
ORGANIC ACIDS
ORGANIC COMPOUNDS
SCATTERING
SORPTION
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties
360602 - Other Materials- Structure & Phase Studies
360601 - Other Materials- Preparation & Manufacture