Advanced Materials

Nanoparticle Actuators



The actuator response of a thin porous film of functionalized gold nanoparticles is found to be fast (< 0 .5 s) and require low voltages (< 0.6 V, see Figure), relative to other comparable systems. The mechanism of reaction is based on non-Faradaic double-layer charging of the films in electrolyte solution. Response can be controlled by varying the nature of the molecules coating the nanoparticles, the thickness of the film, and the electrolyte.