Gold nanowire mesh electrode for electromechanical device

Abstract

Ionic polymer-metal composite (IPMC) actuators were prepared with Nafion film as the ionic polymer and gold nanowire (Au-NW) mesh film as the metal electrodes by hot-pressing, which shortened preparation time within 1 h. As a reference, IPMC actuator consisting of Nafion film and gold foil (Au-foil) was also prepared. Au-NW mesh film can be an electrode with thinner (about 150 nm) and lower surface resistivity (about 0.5 Ω sq−1) than the conventional electrode prepared by electroless plating. Larger contact area of the Au-NW mesh electrode than the Au-foil electrode resulted in better actuation performance (60% larger peak-to-peak displacement in actuation). It was confirmed that the transformation behavior of Au-NWs differed depending on the external stimuli condition. Namely Au-NWs transformed to Au nanoparticles in the case of the heat stimulus only. Meanwhile, Au-NWs transformed to plates in the case of the heat and pressure stimuli. While higher temperature improved the adhesion of Au-NW mesh electrode to the Nafion surface, it induced the transformation of nanowire to plates. The IPMC actuator that the Au-NW mesh electrodes were hot-pressed at 90 ºC exhibited the highest capacitance and the largest peak-to-peak displacement in actuation. This research expanded the application field of gold nanowires to the electromechanical devices.

Self-standing bacterial cellulose-reinforced poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) doped with graphene oxide composite electrodes for high-performance ionic electroactive soft actuators

“…, Pd, Pt, Ag, and Au) on both sides. 9–17 Under an external electric field, the hydrated cations in Nafion flow towards the cathode through the ion nanochannels, causing the cathode side to swell and eventually bend toward the anode.…”

“…1,6,[8][9][10][11] Typical IEAPs are ionic polymer metal composites (IPMCs), which are composed of a central ionexchange polymer (e.g., Naon, Flemion, and Aciplex) and electroless plated metal electrodes (e.g., Pd, Pt, Ag, and Au) on both sides. [9][10][11][12][13][14][15][16][17] Under an external electric eld, the hydrated cations in Naon ow towards the cathode through the ion nanochannels, causing the cathode side to swell and eventually bend toward the anode.…”

High-Performance Nanocellulose-Based Ionic Electroactive Soft Actuators

“…A common example of IEAP is an ionic polymer metal composite (IPMC), which has a sandwich structure with an intermediate ion-exchange membrane (e.g., Nafion, PVDFg-PSS) and chemically plated metal electrodes (e.g., Pt, Pd, Ag, Au) on both sides [10][11][12][13][14][15][16][17][18][19]. The bending deformation of IPMC is caused by the migration of internally hydrated cations under the action of the excitation voltage [20].…”