Mechanisms for Covalent Immobilization of Horseradish Peroxidase on Ion-Beam-Treated Polyethylene
Figure 9
(a) line of XPS fitted spectra of UHMWPE before and after PIII treatment with Ar ions of 20 keV energy and 1016 ions/cm2 fluence. Untreated polyethylene has 532.5 eV low intensity line of oxygen in CO bond. The PIII-treated polyethylene has two lines: 532.5 eV of CO and NO bonds and 533.8 eV of C–O and N–O bonds. (b) line of XPS fitted spectra of UHMWPE before and after PIII treatment with Ar ions of 20 keV energy and 1016 ions/cm2 fluence. The untreated polyethylene does not contain nitrogen. The PIII-treated polyethylene has two lines: 399.2 eV of CN and NO bonds and 400.1 eV of C–N and N–O bonds. (c) line of XPS fitted spectra of UHMWPE before and after PIII treatment with Ar ions of 20 keV energy and 1016 ions/cm2 fluence. The untreated polyethylene has singlet line at 285 eV. The PIII-treated polyethylene has a number of lines: 284.5 eV and 285 eV of hydrocarbon bonds, and 285.8, 286.8, 288, and 289.5 eV of carbon in various oxygen and nitrogen bonds.
