| 301. Retsch, M.; Walther, A.; Loos, K.; Müller, A.H.E.: Synthesis of Dense Poly(acrylic acid) brushes and Their Interaction with Amine-Functional Silsesquioxane Nanoparticles, Langmuir 24(17), 9421-9429 (2008) -- DOI: 10.1021/la8009767 -- PDF | |
| Abstract: Poly(acrylic acid) polyelectrolyte brushes were synthesized by surface-initiated atom transfer radical polymerization (SI-ATRP) of tert-butyl acrylate on planar gold surfaces and subsequent hydrolysis. Three types of monolayers with different number of thiol binding sites per initiating unit were used. The binding strength to the gold surface turned out to be of crucial importance for the formation of uniform brush layers after acidic hydrolysis. The monolayers and polymer brushes were characterized by ellipsometry, infrared spectroscopy, water contact angle, atomic force microscopy and x-ray photoelectron spectroscopy. Their interaction with diglycidylaminopropyl-silsesquioxane nanoparticles at various pH was studied by surface plasmon resonance. |
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- Project: DFG MU896/19: Novel organic-inorganic nanoassembly systems based on pH-induced complexation of water-soluble cationic silica nanoparticles and anionic polyelectrolytes