Twisted and tubular silica structures by anionic surfactant fibers encapsulation
| Autor: | Thomas Bürgi, Valentina Marchionni, Laure Guénée, Mahshid Chekini, Manish Sharma |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
L-arginine ddc:500.2 02 engineering and technology 010402 general chemistry 01 natural sciences Chiral mesoporous silica Biomaterials Colloid and Surface Chemistry Pulmonary surfactant Amphiphile Organic chemistry Aqueous solution Self-assembly 021001 nanoscience & nanotechnology Chiral anionic surfactant 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Chemical engineering Transmission electron microscopy Colloidal gold ddc:540 Organic fiber Encapsulation 0210 nano-technology Mesoporous material Chirality (chemistry) |
| Zdroj: | Journal of Colloid and Interface Science, Vol. 477 (2016) pp. 166-175 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2016.05.049 |
| Popis: | Organic molecules imprinting can be used for introducing specific properties and functionalities such as chirality to mesoporous materials. Particularly organic self-assemblies can work as a scaffold for templating inorganic materials such as silica. During recent years chiral imprinting of anionic surfactant for fabrication of twisted rod-like silica structures assisted by co-structuring directing agent were thoroughly investigated. The organic self-assemblies of anionic surfactants can also be used for introducing other shapes in rod-like silica structures. Here we report the formation of amphiphilic N-miristoyl-l-alanine self-assemblies in aqueous solution upon stirring and at presence of l-arginine. These anionic surfactant self-assemblies form fibers that grow by increasing the stirring duration. The fibers were studied using transmission electron microscopy, infra-red spectroscopy and vibrational circular dichroism. Addition of silica precursor 1,2-bis(triethoxysilyl)ethylene and co-structuring directing agent N-trimethoxysilylpropyl-N,N,N-trimethylammonium chloride at different stages of fibers' growth leads to formation of different silica structures. By controlling stirring duration, we obtained twisted tubular silica structures as a result of fibers encapsulation. We decorated these structures with gold nanoparticles by different methods and measured their optical activity. |
| Databáze: | OpenAIRE |
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