Moisture-induced autonomous surface potential oscillations for energy harvesting

Abstract A variety of autonomous oscillations in nature such as heartbeats and some biochemical reactions have been widely studied utilized for applications the fields bioscience engineering. Here, we report a unique phenomenon moisture-induced electrical potential on polymers, poly([2-(methacryloyloxy)ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide-co-acrylic acid), during diffusion water molecules. Chemical are modeled by kinetic simulations while system dynamic equations stability matrix analyzed to show chaotic which oscillates with hidden attractors induce surface oscillation. Using moisture ambient environment activation source, this self-excited chemoelectrical reaction could broad influences usages surface-reaction based devices systems. As proof-of-concept demonstration, an energy harvester is constructed achieved continuous production more than 15,000 seconds density 16.8 mJ/cm 2 . 2-Volts output voltage has produced power liquid crystal display toward practical five harvesters connected series.