The surface density gradient of grafted poly (ethylene glycol): preparation, characterization and protein adsorption.

@article{Lin1994TheSD,
  title={The surface density gradient of grafted poly (ethylene glycol): preparation, characterization and protein adsorption.},
  author={Y S Lin and Vladimir Hlady and C G G{\"o}lander},
  journal={Colloids and surfaces. B, Biointerfaces},
  year={1994},
  volume={3 1-2},
  pages={49-62}
}
A surface density gradient of grafted poly (ethylene glycol) (PEG) chains was prepared using two-phase silanization of a flat silica surface. The first step was to create the surface density gradient of isocyanatopropyldimethylsilyl groups and to hydrolyze the isocyanato moiety into an amine. These surface amines were reacted with an excess of aldehyde-terminated PEG. The PEG-silica surface was characterized by dynamic contact angle measurements, X-ray photoelectron spectroscopy and… CONTINUE READING

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