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Self-assembly of poly(ethylene glycol)-poly(alkyl phosphonate) terpolymers on titanium oxide surfaces: synthesis, interface characterization, investigation of nonfouling properties, and long-term stability.
Journal article

Self-assembly of poly(ethylene glycol)-poly(alkyl phosphonate) terpolymers on titanium oxide surfaces: synthesis, interface characterization, investigation of nonfouling properties, and long-term stability.

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  • 2009-08-21
Published in:
  • Langmuir : the ACS journal of surfaces and colloids. - 2010
Adsorption
Buffers
Darkness
Humans
Hydrogen-Ion Concentration
Molecular Weight
Organophosphonates
Oxidation-Reduction
Photochemical Processes
Photoelectron Spectroscopy
Polyethylene Glycols
Proteins
Surface Properties
Time Factors
Titanium
English This contribution deals with the self-assembling of a terpolymer on titanium oxide (TiO(2)) surface. The polymer structure was obtained by polymerization of different methacrylates, i.e., alkyl-phosphonated, butyl and PEG methacrylate, in the presence of a chain transfer agent. The resulting PEG-poly(alkyl phosphonate) material, characterized mainly by SEC and NMR, self-organized at the interface of TiO(2). AR-XPS demonstrated the binding of phosphonate groups to TiO(2) substrate and the formation of a PEG-brush layer at the outermost part of the system. The stability of this terpolymer adlayer, after exposure to solutions of pH 2, 7.4, and 9 up to 3 weeks, was evaluated quantitatively by XPS and ellipsometry. We demonstrated an overall stability improvements of this coating against desorption in contact with aqueous solutions in comparison with reference self-assembly systems. Finally, the PEG-terpolymer adlayer proved to impart to TiO(2) substrate antifouling properties when exposed to full blood serum.
Language
  • English
Open access status
closed
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Persistent URL
https://sonar.ch/global/documents/164318
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