Oxygen plasma treatments of polydimethylsiloxane surfaces: effect of the atomic oxygen on capillary flow in the microchannels 
R. Bartali, E. Morganti, L. Lorenzelli, V. Micheli, G. Gottardi, M. Scarpa, M. K. Safeen, P. Rajesh, N. Laidani
Micro & Nano Letters, 2017, Vol. 12, Iss. 10, pp. 754–757 doi: 10.1049/mnl.2017.0230