The virucidal activity of polyethylene slides painted with N,N-dodecyl,methyl-PEI and glass slides covalently derivatized with N,N-hexyl,methyl-PEI against poliovirus. In each set of two bars, the left one corresponds to polyethylene slides, whereas the right one to glass slides. “No slide” refers to a 30 min incubation at room temperature of poliovirus in aqueous solution and serves as a benchmark for 0% virucidal activity. “Bare slide” shows poliovirus incubated between two untreated polyethylene slides or two underivatized glass slides. “Slide coated with polycation” refers to coatings with N,N-dodecyl,methyl-PEI and N,N-hexyl,methyl-PEI and shows approximately 100% virucidal activity in the case of incubation with a painted polyethylene slide and 100% virucidal activity in the case of incubation with a covalently modified glass slide. Each experiment was carried out at least in triplicate. For other conditions, see Materials and Methods Section.