Coating surfaces with N-alkylated polyethylenimines (PEIs), namely branched N,N-hexyl,methyl-PEI via covalent attachment to glass or linear N, N-dodecyl, methyl-PEI by physical deposition ("painting'') onto polyethylene, enables the resultant materials to quickly and efficiently disinfect aqueous solutions of (non-enveloped) poliovirus and rotavirus. Biotechnol. Bioeng. 2011;108: 720-723. (C) 2010 Wiley Periodicals, Inc.