371430.fig.002
Figure 2: Oxygen concentration in the modified layer and depth concentration profile of oxygen, determined from RBS measurements, on plasma-treated LDPE (plasma), LDPE treated with plasma and then grafted with glycine (Gly), polyethylene glycol (PEG), bovine serum albumin (BSA), colloidal carbon particles (C), or a combination of BSA and C (BSA+C).