Keiichi Funasaka

Papers

Total Citations

145

H-Index

About

Keiichi Funasaka is a leading figure in the field of electro-active polymers and soft robotics, with a particular focus on developing novel actuators that respond to environmental stimuli. His most impactful work centers on humidity-sensitive polypyrrole (PPy) films, which he demonstrated can undergo rapid and intensive bending upon exposure to water vapor. This groundbreaking discovery, detailed in his highly cited 2013 paper (145 citations), introduced a fundamentally new type of motor that directly transduces the chemical free energy of sorption into mechanical work. By harnessing this principle, Funasaka has pioneered a class of soft actuators that operate without external power sources, opening new pathways for autonomous, environment-responsive devices. His work bridges materials chemistry and mechanical engineering, offering elegant solutions for micro-robotics, smart textiles, and energy-harvesting systems. Through his innovative use of conducting polymers, Funasaka continues to inspire research into bio-inspired, self-actuating materials that blur the line between sensors and motors.