Abstract
Argon plasma-induced graft polymerization of a solution-coated macromonomer, poly(ethylene glycol) methyl ether methacrylate (PEGMA), on the Si(100) surface was carried out to impart anti-fouling properties to the Si(100) surface. The surface composition and microstructure of the PEGMA graft-polymerized Si(100) surfaces were characterized by X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FTIR), and atomic force microscopy (AFM) measurements. The extent of crosslinking in the plasma-graft polymerized PEGMA (pp-PEGMA) was estimated by gel fraction determination. In general, an appropriate RF power of about 15 W and a PEGMA macromonomer concentration of about 1 wt% in the coating solution for plasma polymerization produced a high graft yield of pp-PEGMA on the Si(100) surface (the pp-PEGMA-g-Si surface). The Si(100) surface with a high concentration of the grafted pp-PEGMA was effective in preventing bovine serum albumin (BSA) adsorption and platelet adhesion.
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