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Keywords:

  • Biocompatible materials;
  • Heparin gradients;
  • Protein immobilization;
  • Plasma polymerization;
  • Glycosaminoglycans
Thumbnail image of graphical abstract

A gradient of functional heparin is fabricated onto a surface chemical gradient of plasma-polymerized allyl amine (see figure). While heparin functionality changes across the gradient, increased adsorption of heparin onto the surface is not accompanied with a continued, corresponding rise in heparin function.