Direct Observation of Structural Evolution in Palmitic Acid Monolayers following Langmuir−Blodgett Deposition
| Autor: | Robert C. Dunn, Sarah A. Vickery and |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Materials science
Surfaces and Interfaces Condensed Matter Physics Surface pressure Langmuir–Blodgett film law.invention Palmitic acid chemistry.chemical_compound Optical microscope chemistry Chemical engineering law Monolayer Electrochemistry General Materials Science Dewetting Mica Spectroscopy Deposition (law) |
| Zdroj: | Langmuir. 17:8204-8209 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la010906y |
| Popis: | Confocal microscopy, atomic force microscopy, and near-field scanning optical microscopy are utilized to study the evolution in structure of palmitic acid monolayers transferred onto mica using the Langmuir−Blodgett technique. Monolayers transferred at a surface pressure of 1.5 mN/m contain condensed islands surrounded by expanded regions of the film. The densed-branch morphology of the condensed domains indicates a nonequilibrium growth mechanism driven by diffusion limited aggregation. Immediately following film transfer, significant evolution in the film structure is observed as palmitic acid in the expanded regions of the film diffuses toward and combines with the condensed domains. The data from the complementary high-resolution techniques suggest a mechanism for domain growth dominated by dewetting following film transfer. |
| Databáze: | OpenAIRE |
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