Surface-Initiated Ring-Opening Polymerization of L-lactide onto Hydroxy Terminated Surface Templates

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Abstract:

The combination of patterning techniques, such as scanning probe based lithography, with the “grafting from” approach of polymer brushes opens the possibility to create structured functional substrates for the fabrication of sensors, electronic devices and others. The use of the surface-initiated ring-opening polymerization furthermore allows the introduction of biodegradable and technologically relevant polymer systems. These surface templates were obtained by the electro-oxidation of an n-octadecyltrichlorosilane coated silicon substrate and were subsequently functionalized with a second functional trichlorosilane, self-assembled onto the oxidized areas. A two step reaction sequence led to the formation of -OH functionalities. These hydroxy moieties served as covalently linked initiator templates for the ring-opening polymerization of L-lactide. Via this technique polymer brushes could be obtained with a height in the order of 30 nm. The created structures were further characterized by FT-IR and XPS spectroscopy as well as AFM microscopy.





Keywords: AFM; L-lactide; electro-oxidation; polymer brushes; ring-opening polymerization; surface modification

Document Type: Research Article

DOI: http://dx.doi.org/10.2174/157341310790945605

Publication date: April 1, 2010

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  • Current Nanoscience publishes authoritative reviews and original research reports, written by experts in the field on all the most recent advances in nanoscience and nanotechnology. All aspects of the field are represented including nano- structures, synthesis, properties, assembly and devices. Applications of nanoscience in biotechnology, medicine, pharmaceuticals, physics, material science and electronics are also covered. The journal is essential to all involved in nanoscience and its applied areas.
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