Figure 2.

Water contact angles as a function of the number of calendering nips. For TiO2 nanoparticle-coated and the reference paperboard. The values are taken after 2 s of the droplet application on the surface.

Stepien et al. Nanoscale Research Letters 2013 8:444   doi:10.1186/1556-276X-8-444
Download authors' original image