Surface Property Modification of Polylactic Acid by Ion Implantation

Abstract

Abstract:We describe our investigations of the surface physicochemical and biological properties 9 of polylactic acid modified by silver, argon and carbon ion implantation to doses of 1 × 10 14 , 1 × 10 15 10 and 1 × 10 16 ion/cm 2 at energies of 20 keV (for C and Ar) and 40 keV (for Ag). X-ray analysis shows 11 enhancement of coherent scattering regions and lattice constant increase after ion implantation. 12Secondary electron mass-spectrometry indicates that Ag concentration in the subsurface layer is 13 less than 80%, but at a depth of 500 nm does not exceed 1-2%. The silver forms metal particles in