Oriented perylene incorporated optically anisotropic 2D silica films
| Autor: | Deepa Sriramulu, Andrew A. Bettiol, Suresh Valiyaveettil, Shuvan Prashant Turaga |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
General Chemical Engineering 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Contact angle chemistry.chemical_compound symbols.namesake Carbon film chemistry Chemical engineering Polymerization symbols Organic chemistry Wetting van der Waals force Thin film 0210 nano-technology Bifunctional Perylene |
| Zdroj: | RSC Advances. 7:32692-32702 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c7ra05036d |
| Popis: | Controlling the assembly of molecules in thin films is essential for developing functional materials for sensitive and smart coatings. Highly oriented heterogeneous and optically anisotropic 2D silica films were prepared at the liquid–liquid interface using octadecylsilane and perylenesilane as starting materials. The film formation involved the organization of molecules assisted by van der Waals interactions and network formation from silica polymerization. All films were fully characterized using a wide range of instruments. Wetting behavior of the thin film was established using contact angle measurement. The octadecylsilica (O-Si) film showed a water contact angle of ∼107° on the hydrophobic side and ∼70° on the hydrophilic side. The films prepared from perylenesilane (P-Si) and mixtures of perylenesilane and octadecylsilane (POx-Si) through hydrolysis, were fully characterized and showed higher contact angle than the O-Si films. As expected, an increase in the concentration of octadecylsilane in POx-Si film led to the disruption of the π–π stacking of perylene groups, followed by changes in optical properties of the film, which were established using spectroscopic techniques. Such bifunctional anisotropic films can be used for creating interesting functional coatings on different substrates. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|