  In this work we studied processing of poly(dimethylsiloxane) (PDMS) surfaces
using dielectric barrier discharge (DBD) plasma in two different assemblies,
one using the primary plasma jet obtained from a conventional DBD and the other
using a DBD plasma jet transfer. The evolution of water contact angle (WCA) in
function of plasma processing time and in function of aging time as well as the
changes in the surface roughness of PDMS samples for both plasma treatments
have been studied. We also compared vibrational and rotational temperatures for
both plasmas and for the first time the vibrational temperature (T_vib) for the
transferred plasma jet has been shown to be higher as compared with the primary
jet. The increment in the T_vib value seems to be the main reason for the
improvements in adhesion properties and surface wettability for the transferred
plasma jet. Possible explanations for the increase in the vibrational
temperature are presented.
