Mechanically cycling gelatin bilayers

Abstract There is a growing interest in making stimuli-responsive polymer systems, particularly ones that are bio-inspired/biomimetic and could perform mechanical work. Here, biological device made from gelatin described can mechanically cycle back forth response to solution pH ionic strength (IS) changes. The bilayer has one layer of Type A the other B gelatin, which have two different isoelectric points therefore ionization states at given pH. cycles when swells more than layer, occurs because or IS change. Maximum bending 10, significantly layer. results show ability use unique properties sources design simple purely machine.