Plasma-based sterilization can destroy thermal matter effectively,
such as bacteria, virus and metabolic product, and has
become a technique widely used on experimental and also
industrial scale [1–4]. However, the safety of sterilization in terms
of material damage is always a concern. When plasma acts on
micro-organisms, the surface of substrate is impacted consequentially,
especially to polymers, which are used in modern medical
devices and transplantable materials more and more. Plasma
containing electrons, ions, and radicals can affect the polymer
surface to an extent of several hundred to several thousand
angstroms, and alter their physicochemical stability. How much do
these changes influence the medical properties of polymer surface
has attracted more and more attention.