Back to All Media Water-Responsive Materials for Evaporation Energy Harvesting Many important physiological functions of living organisms (e.g., plant seed dispersal, bacterial spore activation) rely on water-responsive materials that mechanically deform in response to changes in relative humidity. Share Article Many important physiological functions of living organisms (e.g., plant seed dispersal, bacterial spore activation) rely on water-responsive materials that mechanically deform in response to changes in relative humidity.