Planned Monolayer Assemblies by Adsorption
Abstract
Based on previous experimental results obtained in our laboratories, studies have been carried out with the main purpose of developing organic monolayer and multilayer films of ordered organic molecules that might show real potential as ultrathin protective or passivating coatings for certain practical applications. The research has focused on three interrelated issues: (i) a comparative study of the stability and structural perfection of some representative monolayer systems obtained by the Langmuir-Blodgett method and by self-assembly, and an evaluation of their performance as ultrathin barriers; (ii) an investigation of possible routes to the efficient in-situ chemical modification of preassembled monolayer; (iii) an exploration of the possible construction of high-quality multilayer structures via chemically-controlled self-assembly. The results demonstrate that high-quality mono and multilayer films may be obtained via self assembly, provided certain conditions related to the mode of film-to-surface binding and the geometry of the film forming molecules are fulfilled. For example, highly stable solid supported monolayer barriers, capable of efficiently blocking the passage of ions and molecules from an adjacent fluid phase, could be engineered on various solid substrates using long chain silanes that bind covalently to the underlying surface, while polymerizing laterally to form a compact two-dimensional network.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1988
- Accession Number
- ADA205088
Entities
People
- Jacob Sagiv
Organizations
- Weizmann Institute of Science