Entropic trapping of macromolecules by mesoscopic periodic voids in a polymer hydrogel

Lei Liu, Pusheng Li & Sanford A. Asher*
Nature 1999, 397, 141
and the previous one by Asher group:
Polymerized colloidal crystal hydrogel films as intelligent chemical sensing materials
John H. Holtz & Sanford A. Asher
Nature 1997, 389, 829